Update PostgreSQL driver library

vendor/github.com/lib/pq/README.md

@@ -10,7 +10,7 @@
 ## Docs
 
 For detailed documentation and basic usage examples, please see the package
-documentation at <http://godoc.org/github.com/lib/pq>.
+documentation at <https://godoc.org/github.com/lib/pq>.
 
 ## Tests
 

vendor/github.com/lib/pq/bench_test.go

@@ -0,0 +1,434 @@
+package pq
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"io"
+	"math/rand"
+	"net"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/lib/pq/oid"
+)
+
+var (
+	selectStringQuery = "SELECT '" + strings.Repeat("0123456789", 10) + "'"
+	selectSeriesQuery = "SELECT generate_series(1, 100)"
+)
+
+func BenchmarkSelectString(b *testing.B) {
+	var result string
+	benchQuery(b, selectStringQuery, &result)
+}
+
+func BenchmarkSelectSeries(b *testing.B) {
+	var result int
+	benchQuery(b, selectSeriesQuery, &result)
+}
+
+func benchQuery(b *testing.B, query string, result interface{}) {
+	b.StopTimer()
+	db := openTestConn(b)
+	defer db.Close()
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		benchQueryLoop(b, db, query, result)
+	}
+}
+
+func benchQueryLoop(b *testing.B, db *sql.DB, query string, result interface{}) {
+	rows, err := db.Query(query)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		err = rows.Scan(result)
+		if err != nil {
+			b.Fatal("failed to scan", err)
+		}
+	}
+}
+
+// reading from circularConn yields content[:prefixLen] once, followed by
+// content[prefixLen:] over and over again. It never returns EOF.
+type circularConn struct {
+	content   string
+	prefixLen int
+	pos       int
+	net.Conn  // for all other net.Conn methods that will never be called
+}
+
+func (r *circularConn) Read(b []byte) (n int, err error) {
+	n = copy(b, r.content[r.pos:])
+	r.pos += n
+	if r.pos >= len(r.content) {
+		r.pos = r.prefixLen
+	}
+	return
+}
+
+func (r *circularConn) Write(b []byte) (n int, err error) { return len(b), nil }
+
+func (r *circularConn) Close() error { return nil }
+
+func fakeConn(content string, prefixLen int) *conn {
+	c := &circularConn{content: content, prefixLen: prefixLen}
+	return &conn{buf: bufio.NewReader(c), c: c}
+}
+
+// This benchmark is meant to be the same as BenchmarkSelectString, but takes
+// out some of the factors this package can't control. The numbers are less noisy,
+// but also the costs of network communication aren't accurately represented.
+func BenchmarkMockSelectString(b *testing.B) {
+	b.StopTimer()
+	// taken from a recorded run of BenchmarkSelectString
+	// See: http://www.postgresql.org/docs/current/static/protocol-message-formats.html
+	const response = "1\x00\x00\x00\x04" +
+		"t\x00\x00\x00\x06\x00\x00" +
+		"T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" +
+		"Z\x00\x00\x00\x05I" +
+		"2\x00\x00\x00\x04" +
+		"D\x00\x00\x00n\x00\x01\x00\x00\x00d0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789" +
+		"C\x00\x00\x00\rSELECT 1\x00" +
+		"Z\x00\x00\x00\x05I" +
+		"3\x00\x00\x00\x04" +
+		"Z\x00\x00\x00\x05I"
+	c := fakeConn(response, 0)
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		benchMockQuery(b, c, selectStringQuery)
+	}
+}
+
+var seriesRowData = func() string {
+	var buf bytes.Buffer
+	for i := 1; i <= 100; i++ {
+		digits := byte(2)
+		if i >= 100 {
+			digits = 3
+		} else if i < 10 {
+			digits = 1
+		}
+		buf.WriteString("D\x00\x00\x00")
+		buf.WriteByte(10 + digits)
+		buf.WriteString("\x00\x01\x00\x00\x00")
+		buf.WriteByte(digits)
+		buf.WriteString(strconv.Itoa(i))
+	}
+	return buf.String()
+}()
+
+func BenchmarkMockSelectSeries(b *testing.B) {
+	b.StopTimer()
+	var response = "1\x00\x00\x00\x04" +
+		"t\x00\x00\x00\x06\x00\x00" +
+		"T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" +
+		"Z\x00\x00\x00\x05I" +
+		"2\x00\x00\x00\x04" +
+		seriesRowData +
+		"C\x00\x00\x00\x0fSELECT 100\x00" +
+		"Z\x00\x00\x00\x05I" +
+		"3\x00\x00\x00\x04" +
+		"Z\x00\x00\x00\x05I"
+	c := fakeConn(response, 0)
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		benchMockQuery(b, c, selectSeriesQuery)
+	}
+}
+
+func benchMockQuery(b *testing.B, c *conn, query string) {
+	stmt, err := c.Prepare(query)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer stmt.Close()
+	rows, err := stmt.(driver.StmtQueryContext).QueryContext(context.Background(), nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer rows.Close()
+	var dest [1]driver.Value
+	for {
+		if err := rows.Next(dest[:]); err != nil {
+			if err == io.EOF {
+				break
+			}
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkPreparedSelectString(b *testing.B) {
+	var result string
+	benchPreparedQuery(b, selectStringQuery, &result)
+}
+
+func BenchmarkPreparedSelectSeries(b *testing.B) {
+	var result int
+	benchPreparedQuery(b, selectSeriesQuery, &result)
+}
+
+func benchPreparedQuery(b *testing.B, query string, result interface{}) {
+	b.StopTimer()
+	db := openTestConn(b)
+	defer db.Close()
+	stmt, err := db.Prepare(query)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer stmt.Close()
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		benchPreparedQueryLoop(b, db, stmt, result)
+	}
+}
+
+func benchPreparedQueryLoop(b *testing.B, db *sql.DB, stmt *sql.Stmt, result interface{}) {
+	rows, err := stmt.Query()
+	if err != nil {
+		b.Fatal(err)
+	}
+	if !rows.Next() {
+		rows.Close()
+		b.Fatal("no rows")
+	}
+	defer rows.Close()
+	for rows.Next() {
+		err = rows.Scan(&result)
+		if err != nil {
+			b.Fatal("failed to scan")
+		}
+	}
+}
+
+// See the comment for BenchmarkMockSelectString.
+func BenchmarkMockPreparedSelectString(b *testing.B) {
+	b.StopTimer()
+	const parseResponse = "1\x00\x00\x00\x04" +
+		"t\x00\x00\x00\x06\x00\x00" +
+		"T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" +
+		"Z\x00\x00\x00\x05I"
+	const responses = parseResponse +
+		"2\x00\x00\x00\x04" +
+		"D\x00\x00\x00n\x00\x01\x00\x00\x00d0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789" +
+		"C\x00\x00\x00\rSELECT 1\x00" +
+		"Z\x00\x00\x00\x05I"
+	c := fakeConn(responses, len(parseResponse))
+
+	stmt, err := c.Prepare(selectStringQuery)
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		benchPreparedMockQuery(b, c, stmt)
+	}
+}
+
+func BenchmarkMockPreparedSelectSeries(b *testing.B) {
+	b.StopTimer()
+	const parseResponse = "1\x00\x00\x00\x04" +
+		"t\x00\x00\x00\x06\x00\x00" +
+		"T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" +
+		"Z\x00\x00\x00\x05I"
+	var responses = parseResponse +
+		"2\x00\x00\x00\x04" +
+		seriesRowData +
+		"C\x00\x00\x00\x0fSELECT 100\x00" +
+		"Z\x00\x00\x00\x05I"
+	c := fakeConn(responses, len(parseResponse))
+
+	stmt, err := c.Prepare(selectSeriesQuery)
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		benchPreparedMockQuery(b, c, stmt)
+	}
+}
+
+func benchPreparedMockQuery(b *testing.B, c *conn, stmt driver.Stmt) {
+	rows, err := stmt.(driver.StmtQueryContext).QueryContext(context.Background(), nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer rows.Close()
+	var dest [1]driver.Value
+	for {
+		if err := rows.Next(dest[:]); err != nil {
+			if err == io.EOF {
+				break
+			}
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkEncodeInt64(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		encode(&parameterStatus{}, int64(1234), oid.T_int8)
+	}
+}
+
+func BenchmarkEncodeFloat64(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		encode(&parameterStatus{}, 3.14159, oid.T_float8)
+	}
+}
+
+var testByteString = []byte("abcdefghijklmnopqrstuvwxyz")
+
+func BenchmarkEncodeByteaHex(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		encode(&parameterStatus{serverVersion: 90000}, testByteString, oid.T_bytea)
+	}
+}
+func BenchmarkEncodeByteaEscape(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		encode(&parameterStatus{serverVersion: 84000}, testByteString, oid.T_bytea)
+	}
+}
+
+func BenchmarkEncodeBool(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		encode(&parameterStatus{}, true, oid.T_bool)
+	}
+}
+
+var testTimestamptz = time.Date(2001, time.January, 1, 0, 0, 0, 0, time.Local)
+
+func BenchmarkEncodeTimestamptz(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		encode(&parameterStatus{}, testTimestamptz, oid.T_timestamptz)
+	}
+}
+
+var testIntBytes = []byte("1234")
+
+func BenchmarkDecodeInt64(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		decode(&parameterStatus{}, testIntBytes, oid.T_int8, formatText)
+	}
+}
+
+var testFloatBytes = []byte("3.14159")
+
+func BenchmarkDecodeFloat64(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		decode(&parameterStatus{}, testFloatBytes, oid.T_float8, formatText)
+	}
+}
+
+var testBoolBytes = []byte{'t'}
+
+func BenchmarkDecodeBool(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		decode(&parameterStatus{}, testBoolBytes, oid.T_bool, formatText)
+	}
+}
+
+func TestDecodeBool(t *testing.T) {
+	db := openTestConn(t)
+	rows, err := db.Query("select true")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rows.Close()
+}
+
+var testTimestamptzBytes = []byte("2013-09-17 22:15:32.360754-07")
+
+func BenchmarkDecodeTimestamptz(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		decode(&parameterStatus{}, testTimestamptzBytes, oid.T_timestamptz, formatText)
+	}
+}
+
+func BenchmarkDecodeTimestamptzMultiThread(b *testing.B) {
+	oldProcs := runtime.GOMAXPROCS(0)
+	defer runtime.GOMAXPROCS(oldProcs)
+	runtime.GOMAXPROCS(runtime.NumCPU())
+	globalLocationCache = newLocationCache()
+
+	f := func(wg *sync.WaitGroup, loops int) {
+		defer wg.Done()
+		for i := 0; i < loops; i++ {
+			decode(&parameterStatus{}, testTimestamptzBytes, oid.T_timestamptz, formatText)
+		}
+	}
+
+	wg := &sync.WaitGroup{}
+	b.ResetTimer()
+	for j := 0; j < 10; j++ {
+		wg.Add(1)
+		go f(wg, b.N/10)
+	}
+	wg.Wait()
+}
+
+func BenchmarkLocationCache(b *testing.B) {
+	globalLocationCache = newLocationCache()
+	for i := 0; i < b.N; i++ {
+		globalLocationCache.getLocation(rand.Intn(10000))
+	}
+}
+
+func BenchmarkLocationCacheMultiThread(b *testing.B) {
+	oldProcs := runtime.GOMAXPROCS(0)
+	defer runtime.GOMAXPROCS(oldProcs)
+	runtime.GOMAXPROCS(runtime.NumCPU())
+	globalLocationCache = newLocationCache()
+
+	f := func(wg *sync.WaitGroup, loops int) {
+		defer wg.Done()
+		for i := 0; i < loops; i++ {
+			globalLocationCache.getLocation(rand.Intn(10000))
+		}
+	}
+
+	wg := &sync.WaitGroup{}
+	b.ResetTimer()
+	for j := 0; j < 10; j++ {
+		wg.Add(1)
+		go f(wg, b.N/10)
+	}
+	wg.Wait()
+}
+
+// Stress test the performance of parsing results from the wire.
+func BenchmarkResultParsing(b *testing.B) {
+	b.StopTimer()
+
+	db := openTestConn(b)
+	defer db.Close()
+	_, err := db.Exec("BEGIN")
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		res, err := db.Query("SELECT generate_series(1, 50000)")
+		if err != nil {
+			b.Fatal(err)
+		}
+		res.Close()
+	}
+}

vendor/github.com/lib/pq/certs/README

@@ -0,0 +1,3 @@
+This directory contains certificates and private keys for testing some
+SSL-related functionality in Travis.  Do NOT use these certificates for
+anything other than testing.

vendor/github.com/lib/pq/certs/postgresql.key

@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

vendor/github.com/lib/pq/certs/server.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

vendor/github.com/lib/pq/conn.go

@@ -2,7 +2,9 @@ package pq
 
 import (
 	"bufio"
+	"context"
 	"crypto/md5"
+	"crypto/sha256"
 	"database/sql"
 	"database/sql/driver"
 	"encoding/binary"
@@ -20,6 +22,7 @@ import (
 	"unicode"
 
 	"github.com/lib/pq/oid"
+	"github.com/lib/pq/scram"
 )
 
 // Common error types
@@ -89,13 +92,24 @@ type Dialer interface {
 	DialTimeout(network, address string, timeout time.Duration) (net.Conn, error)
 }
 
-type defaultDialer struct{}
+type DialerContext interface {
-
+	DialContext(ctx context.Context, network, address string) (net.Conn, error)
-func (d defaultDialer) Dial(ntw, addr string) (net.Conn, error) {
-	return net.Dial(ntw, addr)
 }
-func (d defaultDialer) DialTimeout(ntw, addr string, timeout time.Duration) (net.Conn, error) {
+
-	return net.DialTimeout(ntw, addr, timeout)
+type defaultDialer struct {
+	d net.Dialer
+}
+
+func (d defaultDialer) Dial(network, address string) (net.Conn, error) {
+	return d.d.Dial(network, address)
+}
+func (d defaultDialer) DialTimeout(network, address string, timeout time.Duration) (net.Conn, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	return d.DialContext(ctx, network, address)
+}
+func (d defaultDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return d.d.DialContext(ctx, network, address)
 }
 
 type conn struct {
@@ -244,90 +258,35 @@ func (cn *conn) writeBuf(b byte) *writeBuf {
 	}
 }
 
-// Open opens a new connection to the database. name is a connection string.
+// Open opens a new connection to the database. dsn is a connection string.
 // Most users should only use it through database/sql package from the standard
 // library.
-func Open(name string) (_ driver.Conn, err error) {
+func Open(dsn string) (_ driver.Conn, err error) {
-	return DialOpen(defaultDialer{}, name)
+	return DialOpen(defaultDialer{}, dsn)
 }
 
 // DialOpen opens a new connection to the database using a dialer.
-func DialOpen(d Dialer, name string) (_ driver.Conn, err error) {
+func DialOpen(d Dialer, dsn string) (_ driver.Conn, err error) {
+	c, err := NewConnector(dsn)
+	if err != nil {
+		return nil, err
+	}
+	c.dialer = d
+	return c.open(context.Background())
+}
+
+func (c *Connector) open(ctx context.Context) (cn *conn, err error) {
 	// Handle any panics during connection initialization.  Note that we
 	// specifically do *not* want to use errRecover(), as that would turn any
 	// connection errors into ErrBadConns, hiding the real error message from
 	// the user.
 	defer errRecoverNoErrBadConn(&err)
 
-	o := make(values)
+	o := c.opts
 
-	// A number of defaults are applied here, in this order:
+	cn = &conn{
-	//
-	// * Very low precedence defaults applied in every situation
-	// * Environment variables
-	// * Explicitly passed connection information
-	o["host"] = "localhost"
-	o["port"] = "5432"
-	// N.B.: Extra float digits should be set to 3, but that breaks
-	// Postgres 8.4 and older, where the max is 2.
-	o["extra_float_digits"] = "2"
-	for k, v := range parseEnviron(os.Environ()) {
-		o[k] = v
-	}
-
-	if strings.HasPrefix(name, "postgres://") || strings.HasPrefix(name, "postgresql://") {
-		name, err = ParseURL(name)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	if err := parseOpts(name, o); err != nil {
-		return nil, err
-	}
-
-	// Use the "fallback" application name if necessary
-	if fallback, ok := o["fallback_application_name"]; ok {
-		if _, ok := o["application_name"]; !ok {
-			o["application_name"] = fallback
-		}
-	}
-
-	// We can't work with any client_encoding other than UTF-8 currently.
-	// However, we have historically allowed the user to set it to UTF-8
-	// explicitly, and there's no reason to break such programs, so allow that.
-	// Note that the "options" setting could also set client_encoding, but
-	// parsing its value is not worth it.  Instead, we always explicitly send
-	// client_encoding as a separate run-time parameter, which should override
-	// anything set in options.
-	if enc, ok := o["client_encoding"]; ok && !isUTF8(enc) {
-		return nil, errors.New("client_encoding must be absent or 'UTF8'")
-	}
-	o["client_encoding"] = "UTF8"
-	// DateStyle needs a similar treatment.
-	if datestyle, ok := o["datestyle"]; ok {
-		if datestyle != "ISO, MDY" {
-			panic(fmt.Sprintf("setting datestyle must be absent or %v; got %v",
-				"ISO, MDY", datestyle))
-		}
-	} else {
-		o["datestyle"] = "ISO, MDY"
-	}
-
-	// If a user is not provided by any other means, the last
-	// resort is to use the current operating system provided user
-	// name.
-	if _, ok := o["user"]; !ok {
-		u, err := userCurrent()
-		if err != nil {
-			return nil, err
-		}
-		o["user"] = u
-	}
-
-	cn := &conn{
 		opts:   o,
-		dialer: d,
+		dialer: c.dialer,
 	}
 	err = cn.handleDriverSettings(o)
 	if err != nil {
@@ -335,13 +294,16 @@ func DialOpen(d Dialer, name string) (_ driver.Conn, err error) {
 	}
 	cn.handlePgpass(o)
 
-	cn.c, err = dial(d, o)
+	cn.c, err = dial(ctx, c.dialer, o)
 	if err != nil {
 		return nil, err
 	}
 
 	err = cn.ssl(o)
 	if err != nil {
+		if cn.c != nil {
+			cn.c.Close()
+		}
 		return nil, err
 	}
 
@@ -364,10 +326,10 @@ func DialOpen(d Dialer, name string) (_ driver.Conn, err error) {
 	return cn, err
 }
 
-func dial(d Dialer, o values) (net.Conn, error) {
+func dial(ctx context.Context, d Dialer, o values) (net.Conn, error) {
-	ntw, addr := network(o)
+	network, address := network(o)
 	// SSL is not necessary or supported over UNIX domain sockets
-	if ntw == "unix" {
+	if network == "unix" {
 		o["sslmode"] = "disable"
 	}
 
@@ -378,19 +340,30 @@ func dial(d Dialer, o values) (net.Conn, error) {
 			return nil, fmt.Errorf("invalid value for parameter connect_timeout: %s", err)
 		}
 		duration := time.Duration(seconds) * time.Second
+
 		// connect_timeout should apply to the entire connection establishment
 		// procedure, so we both use a timeout for the TCP connection
 		// establishment and set a deadline for doing the initial handshake.
 		// The deadline is then reset after startup() is done.
 		deadline := time.Now().Add(duration)
-		conn, err := d.DialTimeout(ntw, addr, duration)
+		var conn net.Conn
+		if dctx, ok := d.(DialerContext); ok {
+			ctx, cancel := context.WithTimeout(ctx, duration)
+			defer cancel()
+			conn, err = dctx.DialContext(ctx, network, address)
+		} else {
+			conn, err = d.DialTimeout(network, address, duration)
+		}
 		if err != nil {
 			return nil, err
 		}
 		err = conn.SetDeadline(deadline)
 		return conn, err
 	}
-	return d.Dial(ntw, addr)
+	if dctx, ok := d.(DialerContext); ok {
+		return dctx.DialContext(ctx, network, address)
+	}
+	return d.Dial(network, address)
 }
 
 func network(o values) (string, string) {
@@ -704,7 +677,7 @@ func (cn *conn) simpleQuery(q string) (res *rows, err error) {
 			// res might be non-nil here if we received a previous
 			// CommandComplete, but that's fine; just overwrite it
 			res = &rows{cn: cn}
-			res.colNames, res.colFmts, res.colTyps = parsePortalRowDescribe(r)
+			res.rowsHeader = parsePortalRowDescribe(r)
 
 			// To work around a bug in QueryRow in Go 1.2 and earlier, wait
 			// until the first DataRow has been received.
@@ -861,7 +834,7 @@ func (cn *conn) query(query string, args []driver.Value) (_ *rows, err error) {
 		cn.readParseResponse()
 		cn.readBindResponse()
 		rows := &rows{cn: cn}
-		rows.colNames, rows.colFmts, rows.colTyps = cn.readPortalDescribeResponse()
+		rows.rowsHeader = cn.readPortalDescribeResponse()
 		cn.postExecuteWorkaround()
 		return rows, nil
 	}
@@ -869,9 +842,7 @@ func (cn *conn) query(query string, args []driver.Value) (_ *rows, err error) {
 	st.exec(args)
 	return &rows{
 		cn:         cn,
-		colNames: st.colNames,
+		rowsHeader: st.rowsHeader,
-		colTyps:  st.colTyps,
-		colFmts:  st.colFmts,
 	}, nil
 }
 
@@ -992,7 +963,6 @@ func (cn *conn) recv() (t byte, r *readBuf) {
 		if err != nil {
 			panic(err)
 		}
-
 		switch t {
 		case 'E':
 			panic(parseError(r))
@@ -1163,6 +1133,55 @@ func (cn *conn) auth(r *readBuf, o values) {
 		if r.int32() != 0 {
 			errorf("unexpected authentication response: %q", t)
 		}
+	case 10:
+		sc := scram.NewClient(sha256.New, o["user"], o["password"])
+		sc.Step(nil)
+		if sc.Err() != nil {
+			errorf("SCRAM-SHA-256 error: %s", sc.Err().Error())
+		}
+		scOut := sc.Out()
+
+		w := cn.writeBuf('p')
+		w.string("SCRAM-SHA-256")
+		w.int32(len(scOut))
+		w.bytes(scOut)
+		cn.send(w)
+
+		t, r := cn.recv()
+		if t != 'R' {
+			errorf("unexpected password response: %q", t)
+		}
+
+		if r.int32() != 11 {
+			errorf("unexpected authentication response: %q", t)
+		}
+
+		nextStep := r.next(len(*r))
+		sc.Step(nextStep)
+		if sc.Err() != nil {
+			errorf("SCRAM-SHA-256 error: %s", sc.Err().Error())
+		}
+
+		scOut = sc.Out()
+		w = cn.writeBuf('p')
+		w.bytes(scOut)
+		cn.send(w)
+
+		t, r = cn.recv()
+		if t != 'R' {
+			errorf("unexpected password response: %q", t)
+		}
+
+		if r.int32() != 12 {
+			errorf("unexpected authentication response: %q", t)
+		}
+
+		nextStep = r.next(len(*r))
+		sc.Step(nextStep)
+		if sc.Err() != nil {
+			errorf("SCRAM-SHA-256 error: %s", sc.Err().Error())
+		}
+
 	default:
 		errorf("unknown authentication response: %d", code)
 	}
@@ -1182,10 +1201,8 @@ var colFmtDataAllText = []byte{0, 0}
 type stmt struct {
 	cn   *conn
 	name string
-	colNames   []string
+	rowsHeader
-	colFmts    []format
 	colFmtData []byte
-	colTyps    []fieldDesc
 	paramTyps  []oid.Oid
 	closed     bool
 }
@@ -1232,9 +1249,7 @@ func (st *stmt) Query(v []driver.Value) (r driver.Rows, err error) {
 	st.exec(v)
 	return &rows{
 		cn:         st.cn,
-		colNames: st.colNames,
+		rowsHeader: st.rowsHeader,
-		colTyps:  st.colTyps,
-		colFmts:  st.colFmts,
 	}, nil
 }
 
@@ -1344,16 +1359,22 @@ func (cn *conn) parseComplete(commandTag string) (driver.Result, string) {
 	return driver.RowsAffected(n), commandTag
 }
 
-type rows struct {
+type rowsHeader struct {
-	cn       *conn
-	finish   func()
 	colNames []string
 	colTyps  []fieldDesc
 	colFmts  []format
+}
+
+type rows struct {
+	cn     *conn
+	finish func()
+	rowsHeader
 	done   bool
 	rb     readBuf
 	result driver.Result
 	tag    string
+
+	next *rowsHeader
 }
 
 func (rs *rows) Close() error {
@@ -1440,7 +1461,8 @@ func (rs *rows) Next(dest []driver.Value) (err error) {
 			}
 			return
 		case 'T':
-			rs.colNames, rs.colFmts, rs.colTyps = parsePortalRowDescribe(&rs.rb)
+			next := parsePortalRowDescribe(&rs.rb)
+			rs.next = &next
 			return io.EOF
 		default:
 			errorf("unexpected message after execute: %q", t)
@@ -1449,10 +1471,16 @@ func (rs *rows) Next(dest []driver.Value) (err error) {
 }
 
 func (rs *rows) HasNextResultSet() bool {
-	return !rs.done
+	hasNext := rs.next != nil && !rs.done
+	return hasNext
 }
 
 func (rs *rows) NextResultSet() error {
+	if rs.next == nil {
+		return io.EOF
+	}
+	rs.rowsHeader = *rs.next
+	rs.next = nil
 	return nil
 }
 
@@ -1475,6 +1503,39 @@ func QuoteIdentifier(name string) string {
 	return `"` + strings.Replace(name, `"`, `""`, -1) + `"`
 }
 
+// QuoteLiteral quotes a 'literal' (e.g. a parameter, often used to pass literal
+// to DDL and other statements that do not accept parameters) to be used as part
+// of an SQL statement.  For example:
+//
+//    exp_date := pq.QuoteLiteral("2023-01-05 15:00:00Z")
+//    err := db.Exec(fmt.Sprintf("CREATE ROLE my_user VALID UNTIL %s", exp_date))
+//
+// Any single quotes in name will be escaped. Any backslashes (i.e. "\") will be
+// replaced by two backslashes (i.e. "\\") and the C-style escape identifier
+// that PostgreSQL provides ('E') will be prepended to the string.
+func QuoteLiteral(literal string) string {
+	// This follows the PostgreSQL internal algorithm for handling quoted literals
+	// from libpq, which can be found in the "PQEscapeStringInternal" function,
+	// which is found in the libpq/fe-exec.c source file:
+	// https://git.postgresql.org/gitweb/?p=postgresql.git;a=blob;f=src/interfaces/libpq/fe-exec.c
+	//
+	// substitute any single-quotes (') with two single-quotes ('')
+	literal = strings.Replace(literal, `'`, `''`, -1)
+	// determine if the string has any backslashes (\) in it.
+	// if it does, replace any backslashes (\) with two backslashes (\\)
+	// then, we need to wrap the entire string with a PostgreSQL
+	// C-style escape. Per how "PQEscapeStringInternal" handles this case, we
+	// also add a space before the "E"
+	if strings.Contains(literal, `\`) {
+		literal = strings.Replace(literal, `\`, `\\`, -1)
+		literal = ` E'` + literal + `'`
+	} else {
+		// otherwise, we can just wrap the literal with a pair of single quotes
+		literal = `'` + literal + `'`
+	}
+	return literal
+}
+
 func md5s(s string) string {
 	h := md5.New()
 	h.Write([]byte(s))
@@ -1630,13 +1691,13 @@ func (cn *conn) readStatementDescribeResponse() (paramTyps []oid.Oid, colNames [
 	}
 }
 
-func (cn *conn) readPortalDescribeResponse() (colNames []string, colFmts []format, colTyps []fieldDesc) {
+func (cn *conn) readPortalDescribeResponse() rowsHeader {
 	t, r := cn.recv1()
 	switch t {
 	case 'T':
 		return parsePortalRowDescribe(r)
 	case 'n':
-		return nil, nil, nil
+		return rowsHeader{}
 	case 'E':
 		err := parseError(r)
 		cn.readReadyForQuery()
@@ -1742,11 +1803,11 @@ func parseStatementRowDescribe(r *readBuf) (colNames []string, colTyps []fieldDe
 	return
 }
 
-func parsePortalRowDescribe(r *readBuf) (colNames []string, colFmts []format, colTyps []fieldDesc) {
+func parsePortalRowDescribe(r *readBuf) rowsHeader {
 	n := r.int16()
-	colNames = make([]string, n)
+	colNames := make([]string, n)
-	colFmts = make([]format, n)
+	colFmts := make([]format, n)
-	colTyps = make([]fieldDesc, n)
+	colTyps := make([]fieldDesc, n)
 	for i := range colNames {
 		colNames[i] = r.string()
 		r.next(6)
@@ -1755,7 +1816,11 @@ func parsePortalRowDescribe(r *readBuf) (colNames []string, colFmts []format, co
 		colTyps[i].Mod = r.int32()
 		colFmts[i] = format(r.int16())
 	}
-	return
+	return rowsHeader{
+		colNames: colNames,
+		colFmts:  colFmts,
+		colTyps:  colTyps,
+	}
 }
 
 // parseEnviron tries to mimic some of libpq's environment handling

vendor/github.com/lib/pq/conn_go18.go

@@ -1,5 +1,3 @@
-// +build go1.8
-
 package pq
 
 import (
@@ -9,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"time"
 )
 
 // Implement the "QueryerContext" interface
@@ -76,13 +75,32 @@ func (cn *conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx,
 	return tx, nil
 }
 
+func (cn *conn) Ping(ctx context.Context) error {
+	if finish := cn.watchCancel(ctx); finish != nil {
+		defer finish()
+	}
+	rows, err := cn.simpleQuery("SELECT 'lib/pq ping test';")
+	if err != nil {
+		return driver.ErrBadConn // https://golang.org/pkg/database/sql/driver/#Pinger
+	}
+	rows.Close()
+	return nil
+}
+
 func (cn *conn) watchCancel(ctx context.Context) func() {
 	if done := ctx.Done(); done != nil {
 		finished := make(chan struct{})
 		go func() {
 			select {
 			case <-done:
-				_ = cn.cancel()
+				// At this point the function level context is canceled,
+				// so it must not be used for the additional network
+				// request to cancel the query.
+				// Create a new context to pass into the dial.
+				ctxCancel, cancel := context.WithTimeout(context.Background(), time.Second*10)
+				defer cancel()
+
+				_ = cn.cancel(ctxCancel)
 				finished <- struct{}{}
 			case <-finished:
 			}
@@ -97,8 +115,8 @@ func (cn *conn) watchCancel(ctx context.Context) func() {
 	return nil
 }
 
-func (cn *conn) cancel() error {
+func (cn *conn) cancel(ctx context.Context) error {
-	c, err := dial(cn.dialer, cn.opts)
+	c, err := dial(ctx, cn.dialer, cn.opts)
 	if err != nil {
 		return err
 	}

vendor/github.com/lib/pq/connector.go

@@ -1,10 +1,12 @@
-// +build go1.10
-
 package pq
 
 import (
 	"context"
 	"database/sql/driver"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
 )
 
 // Connector represents a fixed configuration for the pq driver with a given
@@ -14,30 +16,95 @@ import (
 //
 // See https://golang.org/pkg/database/sql/driver/#Connector.
 // See https://golang.org/pkg/database/sql/#OpenDB.
-type connector struct {
+type Connector struct {
-	name string
+	opts   values
+	dialer Dialer
 }
 
 // Connect returns a connection to the database using the fixed configuration
 // of this Connector. Context is not used.
-func (c *connector) Connect(_ context.Context) (driver.Conn, error) {
+func (c *Connector) Connect(ctx context.Context) (driver.Conn, error) {
-	return (&Driver{}).Open(c.name)
+	return c.open(ctx)
 }
 
 // Driver returnst the underlying driver of this Connector.
-func (c *connector) Driver() driver.Driver {
+func (c *Connector) Driver() driver.Driver {
 	return &Driver{}
 }
 
-var _ driver.Connector = &connector{}
-
 // NewConnector returns a connector for the pq driver in a fixed configuration
-// with the given name. The returned connector can be used to create any number
+// with the given dsn. The returned connector can be used to create any number
 // of equivalent Conn's. The returned connector is intended to be used with
 // database/sql.OpenDB.
 //
 // See https://golang.org/pkg/database/sql/driver/#Connector.
 // See https://golang.org/pkg/database/sql/#OpenDB.
-func NewConnector(name string) (driver.Connector, error) {
+func NewConnector(dsn string) (*Connector, error) {
-	return &connector{name: name}, nil
+	var err error
+	o := make(values)
+
+	// A number of defaults are applied here, in this order:
+	//
+	// * Very low precedence defaults applied in every situation
+	// * Environment variables
+	// * Explicitly passed connection information
+	o["host"] = "localhost"
+	o["port"] = "5432"
+	// N.B.: Extra float digits should be set to 3, but that breaks
+	// Postgres 8.4 and older, where the max is 2.
+	o["extra_float_digits"] = "2"
+	for k, v := range parseEnviron(os.Environ()) {
+		o[k] = v
+	}
+
+	if strings.HasPrefix(dsn, "postgres://") || strings.HasPrefix(dsn, "postgresql://") {
+		dsn, err = ParseURL(dsn)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if err := parseOpts(dsn, o); err != nil {
+		return nil, err
+	}
+
+	// Use the "fallback" application name if necessary
+	if fallback, ok := o["fallback_application_name"]; ok {
+		if _, ok := o["application_name"]; !ok {
+			o["application_name"] = fallback
+		}
+	}
+
+	// We can't work with any client_encoding other than UTF-8 currently.
+	// However, we have historically allowed the user to set it to UTF-8
+	// explicitly, and there's no reason to break such programs, so allow that.
+	// Note that the "options" setting could also set client_encoding, but
+	// parsing its value is not worth it.  Instead, we always explicitly send
+	// client_encoding as a separate run-time parameter, which should override
+	// anything set in options.
+	if enc, ok := o["client_encoding"]; ok && !isUTF8(enc) {
+		return nil, errors.New("client_encoding must be absent or 'UTF8'")
+	}
+	o["client_encoding"] = "UTF8"
+	// DateStyle needs a similar treatment.
+	if datestyle, ok := o["datestyle"]; ok {
+		if datestyle != "ISO, MDY" {
+			return nil, fmt.Errorf("setting datestyle must be absent or %v; got %v", "ISO, MDY", datestyle)
+		}
+	} else {
+		o["datestyle"] = "ISO, MDY"
+	}
+
+	// If a user is not provided by any other means, the last
+	// resort is to use the current operating system provided user
+	// name.
+	if _, ok := o["user"]; !ok {
+		u, err := userCurrent()
+		if err != nil {
+			return nil, err
+		}
+		o["user"] = u
+	}
+
+	return &Connector{opts: o, dialer: defaultDialer{}}, nil
 }

vendor/github.com/lib/pq/connector_example_test.go

@@ -0,0 +1,33 @@
+// +build go1.10
+
+package pq_test
+
+import (
+	"database/sql"
+	"fmt"
+
+	"github.com/lib/pq"
+)
+
+func ExampleNewConnector() {
+	name := ""
+	connector, err := pq.NewConnector(name)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	db := sql.OpenDB(connector)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	defer db.Close()
+
+	// Use the DB
+	txn, err := db.Begin()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	txn.Rollback()
+}

vendor/github.com/lib/pq/connector_test.go

@@ -0,0 +1,67 @@
+// +build go1.10
+
+package pq
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"testing"
+)
+
+func TestNewConnector_WorksWithOpenDB(t *testing.T) {
+	name := ""
+	c, err := NewConnector(name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	db := sql.OpenDB(c)
+	defer db.Close()
+	// database/sql might not call our Open at all unless we do something with
+	// the connection
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	txn.Rollback()
+}
+
+func TestNewConnector_Connect(t *testing.T) {
+	name := ""
+	c, err := NewConnector(name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	db, err := c.Connect(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	// database/sql might not call our Open at all unless we do something with
+	// the connection
+	txn, err := db.(driver.ConnBeginTx).BeginTx(context.Background(), driver.TxOptions{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	txn.Rollback()
+}
+
+func TestNewConnector_Driver(t *testing.T) {
+	name := ""
+	c, err := NewConnector(name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	db, err := c.Driver().Open(name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	// database/sql might not call our Open at all unless we do something with
+	// the connection
+	txn, err := db.(driver.ConnBeginTx).BeginTx(context.Background(), driver.TxOptions{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	txn.Rollback()
+}

vendor/github.com/lib/pq/copy_test.go

@@ -0,0 +1,468 @@
+package pq
+
+import (
+	"bytes"
+	"database/sql"
+	"database/sql/driver"
+	"net"
+	"strings"
+	"testing"
+)
+
+func TestCopyInStmt(t *testing.T) {
+	stmt := CopyIn("table name")
+	if stmt != `COPY "table name" () FROM STDIN` {
+		t.Fatal(stmt)
+	}
+
+	stmt = CopyIn("table name", "column 1", "column 2")
+	if stmt != `COPY "table name" ("column 1", "column 2") FROM STDIN` {
+		t.Fatal(stmt)
+	}
+
+	stmt = CopyIn(`table " name """`, `co"lumn""`)
+	if stmt != `COPY "table "" name """"""" ("co""lumn""""") FROM STDIN` {
+		t.Fatal(stmt)
+	}
+}
+
+func TestCopyInSchemaStmt(t *testing.T) {
+	stmt := CopyInSchema("schema name", "table name")
+	if stmt != `COPY "schema name"."table name" () FROM STDIN` {
+		t.Fatal(stmt)
+	}
+
+	stmt = CopyInSchema("schema name", "table name", "column 1", "column 2")
+	if stmt != `COPY "schema name"."table name" ("column 1", "column 2") FROM STDIN` {
+		t.Fatal(stmt)
+	}
+
+	stmt = CopyInSchema(`schema " name """`, `table " name """`, `co"lumn""`)
+	if stmt != `COPY "schema "" name """"""".`+
+		`"table "" name """"""" ("co""lumn""""") FROM STDIN` {
+		t.Fatal(stmt)
+	}
+}
+
+func TestCopyInMultipleValues(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (a int, b varchar)")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	stmt, err := txn.Prepare(CopyIn("temp", "a", "b"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	longString := strings.Repeat("#", 500)
+
+	for i := 0; i < 500; i++ {
+		_, err = stmt.Exec(int64(i), longString)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	_, err = stmt.Exec()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = stmt.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var num int
+	err = txn.QueryRow("SELECT COUNT(*) FROM temp").Scan(&num)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if num != 500 {
+		t.Fatalf("expected 500 items, not %d", num)
+	}
+}
+
+func TestCopyInRaiseStmtTrigger(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	if getServerVersion(t, db) < 90000 {
+		var exists int
+		err := db.QueryRow("SELECT 1 FROM pg_language WHERE lanname = 'plpgsql'").Scan(&exists)
+		if err == sql.ErrNoRows {
+			t.Skip("language PL/PgSQL does not exist; skipping TestCopyInRaiseStmtTrigger")
+		} else if err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (a int, b varchar)")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = txn.Exec(`
+			CREATE OR REPLACE FUNCTION pg_temp.temptest()
+			RETURNS trigger AS 
+			$BODY$ begin
+				raise notice 'Hello world';
+				return new;
+			end $BODY$
+			LANGUAGE plpgsql`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = txn.Exec(`
+			CREATE TRIGGER temptest_trigger
+			BEFORE INSERT
+			ON temp 
+			FOR EACH ROW
+			EXECUTE PROCEDURE pg_temp.temptest()`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	stmt, err := txn.Prepare(CopyIn("temp", "a", "b"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	longString := strings.Repeat("#", 500)
+
+	_, err = stmt.Exec(int64(1), longString)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = stmt.Exec()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = stmt.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var num int
+	err = txn.QueryRow("SELECT COUNT(*) FROM temp").Scan(&num)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if num != 1 {
+		t.Fatalf("expected 1 items, not %d", num)
+	}
+}
+
+func TestCopyInTypes(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (num INTEGER, text VARCHAR, blob BYTEA, nothing VARCHAR)")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	stmt, err := txn.Prepare(CopyIn("temp", "num", "text", "blob", "nothing"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = stmt.Exec(int64(1234567890), "Héllö\n ☃!\r\t\\", []byte{0, 255, 9, 10, 13}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = stmt.Exec()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = stmt.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var num int
+	var text string
+	var blob []byte
+	var nothing sql.NullString
+
+	err = txn.QueryRow("SELECT * FROM temp").Scan(&num, &text, &blob, &nothing)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if num != 1234567890 {
+		t.Fatal("unexpected result", num)
+	}
+	if text != "Héllö\n ☃!\r\t\\" {
+		t.Fatal("unexpected result", text)
+	}
+	if !bytes.Equal(blob, []byte{0, 255, 9, 10, 13}) {
+		t.Fatal("unexpected result", blob)
+	}
+	if nothing.Valid {
+		t.Fatal("unexpected result", nothing.String)
+	}
+}
+
+func TestCopyInWrongType(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (num INTEGER)")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	stmt, err := txn.Prepare(CopyIn("temp", "num"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec("Héllö\n ☃!\r\t\\")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = stmt.Exec()
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	if pge := err.(*Error); pge.Code.Name() != "invalid_text_representation" {
+		t.Fatalf("expected 'invalid input syntax for integer' error, got %s (%+v)", pge.Code.Name(), pge)
+	}
+}
+
+func TestCopyOutsideOfTxnError(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	_, err := db.Prepare(CopyIn("temp", "num"))
+	if err == nil {
+		t.Fatal("COPY outside of transaction did not return an error")
+	}
+	if err != errCopyNotSupportedOutsideTxn {
+		t.Fatalf("expected %s, got %s", err, err.Error())
+	}
+}
+
+func TestCopyInBinaryError(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (num INTEGER)")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = txn.Prepare("COPY temp (num) FROM STDIN WITH binary")
+	if err != errBinaryCopyNotSupported {
+		t.Fatalf("expected %s, got %+v", errBinaryCopyNotSupported, err)
+	}
+	// check that the protocol is in a valid state
+	err = txn.Rollback()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestCopyFromError(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (num INTEGER)")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = txn.Prepare("COPY temp (num) TO STDOUT")
+	if err != errCopyToNotSupported {
+		t.Fatalf("expected %s, got %+v", errCopyToNotSupported, err)
+	}
+	// check that the protocol is in a valid state
+	err = txn.Rollback()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestCopySyntaxError(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Prepare("COPY ")
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	if pge := err.(*Error); pge.Code.Name() != "syntax_error" {
+		t.Fatalf("expected syntax error, got %s (%+v)", pge.Code.Name(), pge)
+	}
+	// check that the protocol is in a valid state
+	err = txn.Rollback()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+// Tests for connection errors in copyin.resploop()
+func TestCopyRespLoopConnectionError(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	var pid int
+	err = txn.QueryRow("SELECT pg_backend_pid()").Scan(&pid)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (a int)")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	stmt, err := txn.Prepare(CopyIn("temp", "a"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer stmt.Close()
+
+	_, err = db.Exec("SELECT pg_terminate_backend($1)", pid)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if getServerVersion(t, db) < 90500 {
+		// We have to try and send something over, since postgres before
+		// version 9.5 won't process SIGTERMs while it's waiting for
+		// CopyData/CopyEnd messages; see tcop/postgres.c.
+		_, err = stmt.Exec(1)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	_, err = stmt.Exec()
+	if err == nil {
+		t.Fatalf("expected error")
+	}
+	switch pge := err.(type) {
+	case *Error:
+		if pge.Code.Name() != "admin_shutdown" {
+			t.Fatalf("expected admin_shutdown, got %s", pge.Code.Name())
+		}
+	case *net.OpError:
+		// ignore
+	default:
+		if err == driver.ErrBadConn {
+			// likely an EPIPE
+		} else {
+			t.Fatalf("unexpected error, got %+#v", err)
+		}
+	}
+
+	_ = stmt.Close()
+}
+
+func BenchmarkCopyIn(b *testing.B) {
+	db := openTestConn(b)
+	defer db.Close()
+
+	txn, err := db.Begin()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer txn.Rollback()
+
+	_, err = txn.Exec("CREATE TEMP TABLE temp (a int, b varchar)")
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	stmt, err := txn.Prepare(CopyIn("temp", "a", "b"))
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	for i := 0; i < b.N; i++ {
+		_, err = stmt.Exec(int64(i), "hello world!")
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+
+	_, err = stmt.Exec()
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	err = stmt.Close()
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	var num int
+	err = txn.QueryRow("SELECT COUNT(*) FROM temp").Scan(&num)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	if num != b.N {
+		b.Fatalf("expected %d items, not %d", b.N, num)
+	}
+}

vendor/github.com/lib/pq/doc.go

@@ -239,7 +239,7 @@ for more information).  Note that the channel name will be truncated to 63
 bytes by the PostgreSQL server.
 
 You can find a complete, working example of Listener usage at
-http://godoc.org/github.com/lib/pq/example/listen.
+https://godoc.org/github.com/lib/pq/example/listen.
 
 */
 package pq

vendor/github.com/lib/pq/encode.go

@@ -117,11 +117,10 @@ func textDecode(parameterStatus *parameterStatus, s []byte, typ oid.Oid) interfa
 		}
 		return i
 	case oid.T_float4, oid.T_float8:
-		bits := 64
+		// We always use 64 bit parsing, regardless of whether the input text is for
-		if typ == oid.T_float4 {
+		// a float4 or float8, because clients expect float64s for all float datatypes
-			bits = 32
+		// and returning a 32-bit parsed float64 produces lossy results.
-		}
+		f, err := strconv.ParseFloat(string(s), 64)
-		f, err := strconv.ParseFloat(string(s), bits)
 		if err != nil {
 			errorf("%s", err)
 		}

vendor/github.com/lib/pq/encode_test.go

@@ -0,0 +1,766 @@
+package pq
+
+import (
+	"bytes"
+	"database/sql"
+	"fmt"
+	"regexp"
+	"testing"
+	"time"
+
+	"github.com/lib/pq/oid"
+)
+
+func TestScanTimestamp(t *testing.T) {
+	var nt NullTime
+	tn := time.Now()
+	nt.Scan(tn)
+	if !nt.Valid {
+		t.Errorf("Expected Valid=false")
+	}
+	if nt.Time != tn {
+		t.Errorf("Time value mismatch")
+	}
+}
+
+func TestScanNilTimestamp(t *testing.T) {
+	var nt NullTime
+	nt.Scan(nil)
+	if nt.Valid {
+		t.Errorf("Expected Valid=false")
+	}
+}
+
+var timeTests = []struct {
+	str     string
+	timeval time.Time
+}{
+	{"22001-02-03", time.Date(22001, time.February, 3, 0, 0, 0, 0, time.FixedZone("", 0))},
+	{"2001-02-03", time.Date(2001, time.February, 3, 0, 0, 0, 0, time.FixedZone("", 0))},
+	{"0001-12-31 BC", time.Date(0, time.December, 31, 0, 0, 0, 0, time.FixedZone("", 0))},
+	{"2001-02-03 BC", time.Date(-2000, time.February, 3, 0, 0, 0, 0, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.000001", time.Date(2001, time.February, 3, 4, 5, 6, 1000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.00001", time.Date(2001, time.February, 3, 4, 5, 6, 10000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.0001", time.Date(2001, time.February, 3, 4, 5, 6, 100000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.001", time.Date(2001, time.February, 3, 4, 5, 6, 1000000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.01", time.Date(2001, time.February, 3, 4, 5, 6, 10000000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.1", time.Date(2001, time.February, 3, 4, 5, 6, 100000000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.12", time.Date(2001, time.February, 3, 4, 5, 6, 120000000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.123", time.Date(2001, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.1234", time.Date(2001, time.February, 3, 4, 5, 6, 123400000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.12345", time.Date(2001, time.February, 3, 4, 5, 6, 123450000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.123456", time.Date(2001, time.February, 3, 4, 5, 6, 123456000, time.FixedZone("", 0))},
+	{"2001-02-03 04:05:06.123-07", time.Date(2001, time.February, 3, 4, 5, 6, 123000000,
+		time.FixedZone("", -7*60*60))},
+	{"2001-02-03 04:05:06-07", time.Date(2001, time.February, 3, 4, 5, 6, 0,
+		time.FixedZone("", -7*60*60))},
+	{"2001-02-03 04:05:06-07:42", time.Date(2001, time.February, 3, 4, 5, 6, 0,
+		time.FixedZone("", -(7*60*60+42*60)))},
+	{"2001-02-03 04:05:06-07:30:09", time.Date(2001, time.February, 3, 4, 5, 6, 0,
+		time.FixedZone("", -(7*60*60+30*60+9)))},
+	{"2001-02-03 04:05:06+07", time.Date(2001, time.February, 3, 4, 5, 6, 0,
+		time.FixedZone("", 7*60*60))},
+	{"0011-02-03 04:05:06 BC", time.Date(-10, time.February, 3, 4, 5, 6, 0, time.FixedZone("", 0))},
+	{"0011-02-03 04:05:06.123 BC", time.Date(-10, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))},
+	{"0011-02-03 04:05:06.123-07 BC", time.Date(-10, time.February, 3, 4, 5, 6, 123000000,
+		time.FixedZone("", -7*60*60))},
+	{"0001-02-03 04:05:06.123", time.Date(1, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))},
+	{"0001-02-03 04:05:06.123 BC", time.Date(1, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0)).AddDate(-1, 0, 0)},
+	{"0001-02-03 04:05:06.123 BC", time.Date(0, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))},
+	{"0002-02-03 04:05:06.123 BC", time.Date(0, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0)).AddDate(-1, 0, 0)},
+	{"0002-02-03 04:05:06.123 BC", time.Date(-1, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))},
+	{"12345-02-03 04:05:06.1", time.Date(12345, time.February, 3, 4, 5, 6, 100000000, time.FixedZone("", 0))},
+	{"123456-02-03 04:05:06.1", time.Date(123456, time.February, 3, 4, 5, 6, 100000000, time.FixedZone("", 0))},
+}
+
+// Test that parsing the string results in the expected value.
+func TestParseTs(t *testing.T) {
+	for i, tt := range timeTests {
+		val, err := ParseTimestamp(nil, tt.str)
+		if err != nil {
+			t.Errorf("%d: got error: %v", i, err)
+		} else if val.String() != tt.timeval.String() {
+			t.Errorf("%d: expected to parse %q into %q; got %q",
+				i, tt.str, tt.timeval, val)
+		}
+	}
+}
+
+var timeErrorTests = []string{
+	"BC",
+	" BC",
+	"2001",
+	"2001-2-03",
+	"2001-02-3",
+	"2001-02-03 ",
+	"2001-02-03 B",
+	"2001-02-03 04",
+	"2001-02-03 04:",
+	"2001-02-03 04:05",
+	"2001-02-03 04:05 B",
+	"2001-02-03 04:05 BC",
+	"2001-02-03 04:05:",
+	"2001-02-03 04:05:6",
+	"2001-02-03 04:05:06 B",
+	"2001-02-03 04:05:06BC",
+	"2001-02-03 04:05:06.123 B",
+}
+
+// Test that parsing the string results in an error.
+func TestParseTsErrors(t *testing.T) {
+	for i, tt := range timeErrorTests {
+		_, err := ParseTimestamp(nil, tt)
+		if err == nil {
+			t.Errorf("%d: expected an error from parsing: %v", i, tt)
+		}
+	}
+}
+
+// Now test that sending the value into the database and parsing it back
+// returns the same time.Time value.
+func TestEncodeAndParseTs(t *testing.T) {
+	db, err := openTestConnConninfo("timezone='Etc/UTC'")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	for i, tt := range timeTests {
+		var dbstr string
+		err = db.QueryRow("SELECT ($1::timestamptz)::text", tt.timeval).Scan(&dbstr)
+		if err != nil {
+			t.Errorf("%d: could not send value %q to the database: %s", i, tt.timeval, err)
+			continue
+		}
+
+		val, err := ParseTimestamp(nil, dbstr)
+		if err != nil {
+			t.Errorf("%d: could not parse value %q: %s", i, dbstr, err)
+			continue
+		}
+		val = val.In(tt.timeval.Location())
+		if val.String() != tt.timeval.String() {
+			t.Errorf("%d: expected to parse %q into %q; got %q", i, dbstr, tt.timeval, val)
+		}
+	}
+}
+
+var formatTimeTests = []struct {
+	time     time.Time
+	expected string
+}{
+	{time.Time{}, "0001-01-01 00:00:00Z"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "2001-02-03 04:05:06.123456789Z"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "2001-02-03 04:05:06.123456789+02:00"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "2001-02-03 04:05:06.123456789-06:00"},
+	{time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "2001-02-03 04:05:06-07:30:09"},
+
+	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03 04:05:06.123456789Z"},
+	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03 04:05:06.123456789+02:00"},
+	{time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03 04:05:06.123456789-06:00"},
+
+	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03 04:05:06.123456789Z BC"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03 04:05:06.123456789+02:00 BC"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03 04:05:06.123456789-06:00 BC"},
+
+	{time.Date(1, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03 04:05:06-07:30:09"},
+	{time.Date(0, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03 04:05:06-07:30:09 BC"},
+}
+
+func TestFormatTs(t *testing.T) {
+	for i, tt := range formatTimeTests {
+		val := string(formatTs(tt.time))
+		if val != tt.expected {
+			t.Errorf("%d: incorrect time format %q, want %q", i, val, tt.expected)
+		}
+	}
+}
+
+func TestFormatTsBackend(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	var str string
+	err := db.QueryRow("SELECT '2001-02-03T04:05:06.007-08:09:10'::time::text").Scan(&str)
+	if err == nil {
+		t.Fatalf("PostgreSQL is accepting an ISO timestamp input for time")
+	}
+
+	for i, tt := range formatTimeTests {
+		for _, typ := range []string{"date", "time", "timetz", "timestamp", "timestamptz"} {
+			err = db.QueryRow("SELECT $1::"+typ+"::text", tt.time).Scan(&str)
+			if err != nil {
+				t.Errorf("%d: incorrect time format for %v on the backend: %v", i, typ, err)
+			}
+		}
+	}
+}
+
+func TestTimestampWithTimeZone(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	tx, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer tx.Rollback()
+
+	// try several different locations, all included in Go's zoneinfo.zip
+	for _, locName := range []string{
+		"UTC",
+		"America/Chicago",
+		"America/New_York",
+		"Australia/Darwin",
+		"Australia/Perth",
+	} {
+		loc, err := time.LoadLocation(locName)
+		if err != nil {
+			t.Logf("Could not load time zone %s - skipping", locName)
+			continue
+		}
+
+		// Postgres timestamps have a resolution of 1 microsecond, so don't
+		// use the full range of the Nanosecond argument
+		refTime := time.Date(2012, 11, 6, 10, 23, 42, 123456000, loc)
+
+		for _, pgTimeZone := range []string{"US/Eastern", "Australia/Darwin"} {
+			// Switch Postgres's timezone to test different output timestamp formats
+			_, err = tx.Exec(fmt.Sprintf("set time zone '%s'", pgTimeZone))
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			var gotTime time.Time
+			row := tx.QueryRow("select $1::timestamp with time zone", refTime)
+			err = row.Scan(&gotTime)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if !refTime.Equal(gotTime) {
+				t.Errorf("timestamps not equal: %s != %s", refTime, gotTime)
+			}
+
+			// check that the time zone is set correctly based on TimeZone
+			pgLoc, err := time.LoadLocation(pgTimeZone)
+			if err != nil {
+				t.Logf("Could not load time zone %s - skipping", pgLoc)
+				continue
+			}
+			translated := refTime.In(pgLoc)
+			if translated.String() != gotTime.String() {
+				t.Errorf("timestamps not equal: %s != %s", translated, gotTime)
+			}
+		}
+	}
+}
+
+func TestTimestampWithOutTimezone(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	test := func(ts, pgts string) {
+		r, err := db.Query("SELECT $1::timestamp", pgts)
+		if err != nil {
+			t.Fatalf("Could not run query: %v", err)
+		}
+
+		if !r.Next() {
+			t.Fatal("Expected at least one row")
+		}
+
+		var result time.Time
+		err = r.Scan(&result)
+		if err != nil {
+			t.Fatalf("Did not expect error scanning row: %v", err)
+		}
+
+		expected, err := time.Parse(time.RFC3339, ts)
+		if err != nil {
+			t.Fatalf("Could not parse test time literal: %v", err)
+		}
+
+		if !result.Equal(expected) {
+			t.Fatalf("Expected time to match %v: got mismatch %v",
+				expected, result)
+		}
+
+		if r.Next() {
+			t.Fatal("Expected only one row")
+		}
+	}
+
+	test("2000-01-01T00:00:00Z", "2000-01-01T00:00:00")
+
+	// Test higher precision time
+	test("2013-01-04T20:14:58.80033Z", "2013-01-04 20:14:58.80033")
+}
+
+func TestInfinityTimestamp(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+	var err error
+	var resultT time.Time
+
+	expectedErrorStrRegexp := regexp.MustCompile(
+		`^sql: Scan error on column index 0(, name "timestamp(tz)?"|): unsupported`)
+
+	type testCases []struct {
+		Query                  string
+		Param                  string
+		ExpectedErrorStrRegexp *regexp.Regexp
+		ExpectedVal            interface{}
+	}
+	tc := testCases{
+		{"SELECT $1::timestamp", "-infinity", expectedErrorStrRegexp, "-infinity"},
+		{"SELECT $1::timestamptz", "-infinity", expectedErrorStrRegexp, "-infinity"},
+		{"SELECT $1::timestamp", "infinity", expectedErrorStrRegexp, "infinity"},
+		{"SELECT $1::timestamptz", "infinity", expectedErrorStrRegexp, "infinity"},
+	}
+	// try to assert []byte to time.Time
+	for _, q := range tc {
+		err = db.QueryRow(q.Query, q.Param).Scan(&resultT)
+		if !q.ExpectedErrorStrRegexp.MatchString(err.Error()) {
+			t.Errorf("Scanning -/+infinity, expected error to match regexp %q, got %q",
+				q.ExpectedErrorStrRegexp, err)
+		}
+	}
+	// yield []byte
+	for _, q := range tc {
+		var resultI interface{}
+		err = db.QueryRow(q.Query, q.Param).Scan(&resultI)
+		if err != nil {
+			t.Errorf("Scanning -/+infinity, expected no error, got %q", err)
+		}
+		result, ok := resultI.([]byte)
+		if !ok {
+			t.Errorf("Scanning -/+infinity, expected []byte, got %#v", resultI)
+		}
+		if string(result) != q.ExpectedVal {
+			t.Errorf("Scanning -/+infinity, expected %q, got %q", q.ExpectedVal, result)
+		}
+	}
+
+	y1500 := time.Date(1500, time.January, 1, 0, 0, 0, 0, time.UTC)
+	y2500 := time.Date(2500, time.January, 1, 0, 0, 0, 0, time.UTC)
+	EnableInfinityTs(y1500, y2500)
+
+	err = db.QueryRow("SELECT $1::timestamp", "infinity").Scan(&resultT)
+	if err != nil {
+		t.Errorf("Scanning infinity, expected no error, got %q", err)
+	}
+	if !resultT.Equal(y2500) {
+		t.Errorf("Scanning infinity, expected %q, got %q", y2500, resultT)
+	}
+
+	err = db.QueryRow("SELECT $1::timestamptz", "infinity").Scan(&resultT)
+	if err != nil {
+		t.Errorf("Scanning infinity, expected no error, got %q", err)
+	}
+	if !resultT.Equal(y2500) {
+		t.Errorf("Scanning Infinity, expected time %q, got %q", y2500, resultT.String())
+	}
+
+	err = db.QueryRow("SELECT $1::timestamp", "-infinity").Scan(&resultT)
+	if err != nil {
+		t.Errorf("Scanning -infinity, expected no error, got %q", err)
+	}
+	if !resultT.Equal(y1500) {
+		t.Errorf("Scanning -infinity, expected time %q, got %q", y1500, resultT.String())
+	}
+
+	err = db.QueryRow("SELECT $1::timestamptz", "-infinity").Scan(&resultT)
+	if err != nil {
+		t.Errorf("Scanning -infinity, expected no error, got %q", err)
+	}
+	if !resultT.Equal(y1500) {
+		t.Errorf("Scanning -infinity, expected time %q, got %q", y1500, resultT.String())
+	}
+
+	ym1500 := time.Date(-1500, time.January, 1, 0, 0, 0, 0, time.UTC)
+	y11500 := time.Date(11500, time.January, 1, 0, 0, 0, 0, time.UTC)
+	var s string
+	err = db.QueryRow("SELECT $1::timestamp::text", ym1500).Scan(&s)
+	if err != nil {
+		t.Errorf("Encoding -infinity, expected no error, got %q", err)
+	}
+	if s != "-infinity" {
+		t.Errorf("Encoding -infinity, expected %q, got %q", "-infinity", s)
+	}
+	err = db.QueryRow("SELECT $1::timestamptz::text", ym1500).Scan(&s)
+	if err != nil {
+		t.Errorf("Encoding -infinity, expected no error, got %q", err)
+	}
+	if s != "-infinity" {
+		t.Errorf("Encoding -infinity, expected %q, got %q", "-infinity", s)
+	}
+
+	err = db.QueryRow("SELECT $1::timestamp::text", y11500).Scan(&s)
+	if err != nil {
+		t.Errorf("Encoding infinity, expected no error, got %q", err)
+	}
+	if s != "infinity" {
+		t.Errorf("Encoding infinity, expected %q, got %q", "infinity", s)
+	}
+	err = db.QueryRow("SELECT $1::timestamptz::text", y11500).Scan(&s)
+	if err != nil {
+		t.Errorf("Encoding infinity, expected no error, got %q", err)
+	}
+	if s != "infinity" {
+		t.Errorf("Encoding infinity, expected %q, got %q", "infinity", s)
+	}
+
+	disableInfinityTs()
+
+	var panicErrorString string
+	func() {
+		defer func() {
+			panicErrorString, _ = recover().(string)
+		}()
+		EnableInfinityTs(y2500, y1500)
+	}()
+	if panicErrorString != infinityTsNegativeMustBeSmaller {
+		t.Errorf("Expected error, %q, got %q", infinityTsNegativeMustBeSmaller, panicErrorString)
+	}
+}
+
+func TestStringWithNul(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	hello0world := string("hello\x00world")
+	_, err := db.Query("SELECT $1::text", &hello0world)
+	if err == nil {
+		t.Fatal("Postgres accepts a string with nul in it; " +
+			"injection attacks may be plausible")
+	}
+}
+
+func TestByteSliceToText(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	b := []byte("hello world")
+	row := db.QueryRow("SELECT $1::text", b)
+
+	var result []byte
+	err := row.Scan(&result)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(result) != string(b) {
+		t.Fatalf("expected %v but got %v", b, result)
+	}
+}
+
+func TestStringToBytea(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	b := "hello world"
+	row := db.QueryRow("SELECT $1::bytea", b)
+
+	var result []byte
+	err := row.Scan(&result)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(result, []byte(b)) {
+		t.Fatalf("expected %v but got %v", b, result)
+	}
+}
+
+func TestTextByteSliceToUUID(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	b := []byte("a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11")
+	row := db.QueryRow("SELECT $1::uuid", b)
+
+	var result string
+	err := row.Scan(&result)
+	if forceBinaryParameters() {
+		pqErr := err.(*Error)
+		if pqErr == nil {
+			t.Errorf("Expected to get error")
+		} else if pqErr.Code != "22P03" {
+			t.Fatalf("Expected to get invalid binary encoding error (22P03), got %s", pqErr.Code)
+		}
+	} else {
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if result != string(b) {
+			t.Fatalf("expected %v but got %v", b, result)
+		}
+	}
+}
+
+func TestBinaryByteSlicetoUUID(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	b := []byte{'\xa0', '\xee', '\xbc', '\x99',
+		'\x9c', '\x0b',
+		'\x4e', '\xf8',
+		'\xbb', '\x00', '\x6b',
+		'\xb9', '\xbd', '\x38', '\x0a', '\x11'}
+	row := db.QueryRow("SELECT $1::uuid", b)
+
+	var result string
+	err := row.Scan(&result)
+	if forceBinaryParameters() {
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if result != string("a0eebc99-9c0b-4ef8-bb00-6bb9bd380a11") {
+			t.Fatalf("expected %v but got %v", b, result)
+		}
+	} else {
+		pqErr := err.(*Error)
+		if pqErr == nil {
+			t.Errorf("Expected to get error")
+		} else if pqErr.Code != "22021" {
+			t.Fatalf("Expected to get invalid byte sequence for encoding error (22021), got %s", pqErr.Code)
+		}
+	}
+}
+
+func TestStringToUUID(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	s := "a0eebc99-9c0b-4ef8-bb00-6bb9bd380a11"
+	row := db.QueryRow("SELECT $1::uuid", s)
+
+	var result string
+	err := row.Scan(&result)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if result != s {
+		t.Fatalf("expected %v but got %v", s, result)
+	}
+}
+
+func TestTextByteSliceToInt(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	expected := 12345678
+	b := []byte(fmt.Sprintf("%d", expected))
+	row := db.QueryRow("SELECT $1::int", b)
+
+	var result int
+	err := row.Scan(&result)
+	if forceBinaryParameters() {
+		pqErr := err.(*Error)
+		if pqErr == nil {
+			t.Errorf("Expected to get error")
+		} else if pqErr.Code != "22P03" {
+			t.Fatalf("Expected to get invalid binary encoding error (22P03), got %s", pqErr.Code)
+		}
+	} else {
+		if err != nil {
+			t.Fatal(err)
+		}
+		if result != expected {
+			t.Fatalf("expected %v but got %v", expected, result)
+		}
+	}
+}
+
+func TestBinaryByteSliceToInt(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	expected := 12345678
+	b := []byte{'\x00', '\xbc', '\x61', '\x4e'}
+	row := db.QueryRow("SELECT $1::int", b)
+
+	var result int
+	err := row.Scan(&result)
+	if forceBinaryParameters() {
+		if err != nil {
+			t.Fatal(err)
+		}
+		if result != expected {
+			t.Fatalf("expected %v but got %v", expected, result)
+		}
+	} else {
+		pqErr := err.(*Error)
+		if pqErr == nil {
+			t.Errorf("Expected to get error")
+		} else if pqErr.Code != "22021" {
+			t.Fatalf("Expected to get invalid byte sequence for encoding error (22021), got %s", pqErr.Code)
+		}
+	}
+}
+
+func TestTextDecodeIntoString(t *testing.T) {
+	input := []byte("hello world")
+	want := string(input)
+	for _, typ := range []oid.Oid{oid.T_char, oid.T_varchar, oid.T_text} {
+		got := decode(&parameterStatus{}, input, typ, formatText)
+		if got != want {
+			t.Errorf("invalid string decoding output for %T(%+v), got %v but expected %v", typ, typ, got, want)
+		}
+	}
+}
+
+func TestByteaOutputFormatEncoding(t *testing.T) {
+	input := []byte("\\x\x00\x01\x02\xFF\xFEabcdefg0123")
+	want := []byte("\\x5c78000102fffe6162636465666730313233")
+	got := encode(&parameterStatus{serverVersion: 90000}, input, oid.T_bytea)
+	if !bytes.Equal(want, got) {
+		t.Errorf("invalid hex bytea output, got %v but expected %v", got, want)
+	}
+
+	want = []byte("\\\\x\\000\\001\\002\\377\\376abcdefg0123")
+	got = encode(&parameterStatus{serverVersion: 84000}, input, oid.T_bytea)
+	if !bytes.Equal(want, got) {
+		t.Errorf("invalid escape bytea output, got %v but expected %v", got, want)
+	}
+}
+
+func TestByteaOutputFormats(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	if getServerVersion(t, db) < 90000 {
+		// skip
+		return
+	}
+
+	testByteaOutputFormat := func(f string, usePrepared bool) {
+		expectedData := []byte("\x5c\x78\x00\xff\x61\x62\x63\x01\x08")
+		sqlQuery := "SELECT decode('5c7800ff6162630108', 'hex')"
+
+		var data []byte
+
+		// use a txn to avoid relying on getting the same connection
+		txn, err := db.Begin()
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer txn.Rollback()
+
+		_, err = txn.Exec("SET LOCAL bytea_output TO " + f)
+		if err != nil {
+			t.Fatal(err)
+		}
+		var rows *sql.Rows
+		var stmt *sql.Stmt
+		if usePrepared {
+			stmt, err = txn.Prepare(sqlQuery)
+			if err != nil {
+				t.Fatal(err)
+			}
+			rows, err = stmt.Query()
+		} else {
+			// use Query; QueryRow would hide the actual error
+			rows, err = txn.Query(sqlQuery)
+		}
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !rows.Next() {
+			if rows.Err() != nil {
+				t.Fatal(rows.Err())
+			}
+			t.Fatal("shouldn't happen")
+		}
+		err = rows.Scan(&data)
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = rows.Close()
+		if err != nil {
+			t.Fatal(err)
+		}
+		if stmt != nil {
+			err = stmt.Close()
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+		if !bytes.Equal(data, expectedData) {
+			t.Errorf("unexpected bytea value %v for format %s; expected %v", data, f, expectedData)
+		}
+	}
+
+	testByteaOutputFormat("hex", false)
+	testByteaOutputFormat("escape", false)
+	testByteaOutputFormat("hex", true)
+	testByteaOutputFormat("escape", true)
+}
+
+func TestAppendEncodedText(t *testing.T) {
+	var buf []byte
+
+	buf = appendEncodedText(&parameterStatus{serverVersion: 90000}, buf, int64(10))
+	buf = append(buf, '\t')
+	buf = appendEncodedText(&parameterStatus{serverVersion: 90000}, buf, 42.0000000001)
+	buf = append(buf, '\t')
+	buf = appendEncodedText(&parameterStatus{serverVersion: 90000}, buf, "hello\tworld")
+	buf = append(buf, '\t')
+	buf = appendEncodedText(&parameterStatus{serverVersion: 90000}, buf, []byte{0, 128, 255})
+
+	if string(buf) != "10\t42.0000000001\thello\\tworld\t\\\\x0080ff" {
+		t.Fatal(string(buf))
+	}
+}
+
+func TestAppendEscapedText(t *testing.T) {
+	if esc := appendEscapedText(nil, "hallo\tescape"); string(esc) != "hallo\\tescape" {
+		t.Fatal(string(esc))
+	}
+	if esc := appendEscapedText(nil, "hallo\\tescape\n"); string(esc) != "hallo\\\\tescape\\n" {
+		t.Fatal(string(esc))
+	}
+	if esc := appendEscapedText(nil, "\n\r\t\f"); string(esc) != "\\n\\r\\t\f" {
+		t.Fatal(string(esc))
+	}
+}
+
+func TestAppendEscapedTextExistingBuffer(t *testing.T) {
+	buf := []byte("123\t")
+	if esc := appendEscapedText(buf, "hallo\tescape"); string(esc) != "123\thallo\\tescape" {
+		t.Fatal(string(esc))
+	}
+	buf = []byte("123\t")
+	if esc := appendEscapedText(buf, "hallo\\tescape\n"); string(esc) != "123\thallo\\\\tescape\\n" {
+		t.Fatal(string(esc))
+	}
+	buf = []byte("123\t")
+	if esc := appendEscapedText(buf, "\n\r\t\f"); string(esc) != "123\t\\n\\r\\t\f" {
+		t.Fatal(string(esc))
+	}
+}
+
+func BenchmarkAppendEscapedText(b *testing.B) {
+	longString := ""
+	for i := 0; i < 100; i++ {
+		longString += "123456789\n"
+	}
+	for i := 0; i < b.N; i++ {
+		appendEscapedText(nil, longString)
+	}
+}
+
+func BenchmarkAppendEscapedTextNoEscape(b *testing.B) {
+	longString := ""
+	for i := 0; i < 100; i++ {
+		longString += "1234567890"
+	}
+	for i := 0; i < b.N; i++ {
+		appendEscapedText(nil, longString)
+	}
+}

vendor/github.com/lib/pq/example/listen/doc.go

@@ -0,0 +1,98 @@
+/*
+
+Package listen is a self-contained Go program which uses the LISTEN / NOTIFY
+mechanism to avoid polling the database while waiting for more work to arrive.
+
+    //
+    // You can see the program in action by defining a function similar to
+    // the following:
+    //
+    // CREATE OR REPLACE FUNCTION public.get_work()
+    //   RETURNS bigint
+    //   LANGUAGE sql
+    //   AS $$
+    //     SELECT CASE WHEN random() >= 0.2 THEN int8 '1' END
+    //   $$
+    // ;
+
+    package main
+
+    import (
+        "database/sql"
+        "fmt"
+        "time"
+
+        "github.com/lib/pq"
+    )
+
+    func doWork(db *sql.DB, work int64) {
+        // work here
+    }
+
+    func getWork(db *sql.DB) {
+        for {
+            // get work from the database here
+            var work sql.NullInt64
+            err := db.QueryRow("SELECT get_work()").Scan(&work)
+            if err != nil {
+                fmt.Println("call to get_work() failed: ", err)
+                time.Sleep(10 * time.Second)
+                continue
+            }
+            if !work.Valid {
+                // no more work to do
+                fmt.Println("ran out of work")
+                return
+            }
+
+            fmt.Println("starting work on ", work.Int64)
+            go doWork(db, work.Int64)
+        }
+    }
+
+    func waitForNotification(l *pq.Listener) {
+        select {
+            case <-l.Notify:
+                fmt.Println("received notification, new work available")
+            case <-time.After(90 * time.Second):
+                go l.Ping()
+                // Check if there's more work available, just in case it takes
+                // a while for the Listener to notice connection loss and
+                // reconnect.
+                fmt.Println("received no work for 90 seconds, checking for new work")
+        }
+    }
+
+    func main() {
+        var conninfo string = ""
+
+        db, err := sql.Open("postgres", conninfo)
+        if err != nil {
+            panic(err)
+        }
+
+        reportProblem := func(ev pq.ListenerEventType, err error) {
+            if err != nil {
+                fmt.Println(err.Error())
+            }
+        }
+
+        minReconn := 10 * time.Second
+        maxReconn := time.Minute
+        listener := pq.NewListener(conninfo, minReconn, maxReconn, reportProblem)
+        err = listener.Listen("getwork")
+        if err != nil {
+            panic(err)
+        }
+
+        fmt.Println("entering main loop")
+        for {
+            // process all available work before waiting for notifications
+            getWork(db)
+            waitForNotification(listener)
+        }
+    }
+
+
+*/
+package listen

vendor/github.com/lib/pq/go18_test.go

@@ -0,0 +1,319 @@
+package pq
+
+import (
+	"context"
+	"database/sql"
+	"runtime"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestMultipleSimpleQuery(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	rows, err := db.Query("select 1; set time zone default; select 2; select 3")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+
+	var i int
+	for rows.Next() {
+		if err := rows.Scan(&i); err != nil {
+			t.Fatal(err)
+		}
+		if i != 1 {
+			t.Fatalf("expected 1, got %d", i)
+		}
+	}
+	if !rows.NextResultSet() {
+		t.Fatal("expected more result sets", rows.Err())
+	}
+	for rows.Next() {
+		if err := rows.Scan(&i); err != nil {
+			t.Fatal(err)
+		}
+		if i != 2 {
+			t.Fatalf("expected 2, got %d", i)
+		}
+	}
+
+	// Make sure that if we ignore a result we can still query.
+
+	rows, err = db.Query("select 4; select 5")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		if err := rows.Scan(&i); err != nil {
+			t.Fatal(err)
+		}
+		if i != 4 {
+			t.Fatalf("expected 4, got %d", i)
+		}
+	}
+	if !rows.NextResultSet() {
+		t.Fatal("expected more result sets", rows.Err())
+	}
+	for rows.Next() {
+		if err := rows.Scan(&i); err != nil {
+			t.Fatal(err)
+		}
+		if i != 5 {
+			t.Fatalf("expected 5, got %d", i)
+		}
+	}
+	if rows.NextResultSet() {
+		t.Fatal("unexpected result set")
+	}
+}
+
+const contextRaceIterations = 100
+
+func TestContextCancelExec(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// Delay execution for just a bit until db.ExecContext has begun.
+	defer time.AfterFunc(time.Millisecond*10, cancel).Stop()
+
+	// Not canceled until after the exec has started.
+	if _, err := db.ExecContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "pq: canceling statement due to user request" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Context is already canceled, so error should come before execution.
+	if _, err := db.ExecContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "context canceled" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	for i := 0; i < contextRaceIterations; i++ {
+		func() {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+			if _, err := db.ExecContext(ctx, "select 1"); err != nil {
+				t.Fatal(err)
+			}
+		}()
+
+		if _, err := db.Exec("select 1"); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestContextCancelQuery(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// Delay execution for just a bit until db.QueryContext has begun.
+	defer time.AfterFunc(time.Millisecond*10, cancel).Stop()
+
+	// Not canceled until after the exec has started.
+	if _, err := db.QueryContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "pq: canceling statement due to user request" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Context is already canceled, so error should come before execution.
+	if _, err := db.QueryContext(ctx, "select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "context canceled" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	for i := 0; i < contextRaceIterations; i++ {
+		func() {
+			ctx, cancel := context.WithCancel(context.Background())
+			rows, err := db.QueryContext(ctx, "select 1")
+			cancel()
+			if err != nil {
+				t.Fatal(err)
+			} else if err := rows.Close(); err != nil {
+				t.Fatal(err)
+			}
+		}()
+
+		if rows, err := db.Query("select 1"); err != nil {
+			t.Fatal(err)
+		} else if err := rows.Close(); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+// TestIssue617 tests that a failed query in QueryContext doesn't lead to a
+// goroutine leak.
+func TestIssue617(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	const N = 10
+
+	numGoroutineStart := runtime.NumGoroutine()
+	for i := 0; i < N; i++ {
+		func() {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+			_, err := db.QueryContext(ctx, `SELECT * FROM DOESNOTEXIST`)
+			pqErr, _ := err.(*Error)
+			// Expecting "pq: relation \"doesnotexist\" does not exist" error.
+			if err == nil || pqErr == nil || pqErr.Code != "42P01" {
+				t.Fatalf("expected undefined table error, got %v", err)
+			}
+		}()
+	}
+	numGoroutineFinish := runtime.NumGoroutine()
+
+	// We use N/2 and not N because the GC and other actors may increase or
+	// decrease the number of goroutines.
+	if numGoroutineFinish-numGoroutineStart >= N/2 {
+		t.Errorf("goroutine leak detected, was %d, now %d", numGoroutineStart, numGoroutineFinish)
+	}
+}
+
+func TestContextCancelBegin(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Delay execution for just a bit until tx.Exec has begun.
+	defer time.AfterFunc(time.Millisecond*10, cancel).Stop()
+
+	// Not canceled until after the exec has started.
+	if _, err := tx.Exec("select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "pq: canceling statement due to user request" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Transaction is canceled, so expect an error.
+	if _, err := tx.Query("select pg_sleep(1)"); err == nil {
+		t.Fatal("expected error")
+	} else if err != sql.ErrTxDone {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	// Context is canceled, so cannot begin a transaction.
+	if _, err := db.BeginTx(ctx, nil); err == nil {
+		t.Fatal("expected error")
+	} else if err.Error() != "context canceled" {
+		t.Fatalf("unexpected error: %s", err)
+	}
+
+	for i := 0; i < contextRaceIterations; i++ {
+		func() {
+			ctx, cancel := context.WithCancel(context.Background())
+			tx, err := db.BeginTx(ctx, nil)
+			cancel()
+			if err != nil {
+				t.Fatal(err)
+			} else if err := tx.Rollback(); err != nil &&
+				err.Error() != "pq: canceling statement due to user request" &&
+				err != sql.ErrTxDone {
+				t.Fatal(err)
+			}
+		}()
+
+		if tx, err := db.Begin(); err != nil {
+			t.Fatal(err)
+		} else if err := tx.Rollback(); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestTxOptions(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+	ctx := context.Background()
+
+	tests := []struct {
+		level     sql.IsolationLevel
+		isolation string
+	}{
+		{
+			level:     sql.LevelDefault,
+			isolation: "",
+		},
+		{
+			level:     sql.LevelReadUncommitted,
+			isolation: "read uncommitted",
+		},
+		{
+			level:     sql.LevelReadCommitted,
+			isolation: "read committed",
+		},
+		{
+			level:     sql.LevelRepeatableRead,
+			isolation: "repeatable read",
+		},
+		{
+			level:     sql.LevelSerializable,
+			isolation: "serializable",
+		},
+	}
+
+	for _, test := range tests {
+		for _, ro := range []bool{true, false} {
+			tx, err := db.BeginTx(ctx, &sql.TxOptions{
+				Isolation: test.level,
+				ReadOnly:  ro,
+			})
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			var isolation string
+			err = tx.QueryRow("select current_setting('transaction_isolation')").Scan(&isolation)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if test.isolation != "" && isolation != test.isolation {
+				t.Errorf("wrong isolation level: %s != %s", isolation, test.isolation)
+			}
+
+			var isRO string
+			err = tx.QueryRow("select current_setting('transaction_read_only')").Scan(&isRO)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if ro != (isRO == "on") {
+				t.Errorf("read/[write,only] not set: %t != %s for level %s",
+					ro, isRO, test.isolation)
+			}
+
+			tx.Rollback()
+		}
+	}
+
+	_, err := db.BeginTx(ctx, &sql.TxOptions{
+		Isolation: sql.LevelLinearizable,
+	})
+	if err == nil {
+		t.Fatal("expected LevelLinearizable to fail")
+	}
+	if !strings.Contains(err.Error(), "isolation level not supported") {
+		t.Errorf("Expected error to mention isolation level, got %q", err)
+	}
+}

vendor/github.com/lib/pq/go19_test.go

@@ -0,0 +1,69 @@
+// +build go1.9
+
+package pq
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"reflect"
+	"testing"
+)
+
+func TestPing(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	db := openTestConn(t)
+	defer db.Close()
+
+	if _, ok := reflect.TypeOf(db).MethodByName("Conn"); !ok {
+		t.Skipf("Conn method undefined on type %T, skipping test (requires at least go1.9)", db)
+	}
+
+	if err := db.PingContext(ctx); err != nil {
+		t.Fatal("expected Ping to succeed")
+	}
+	defer cancel()
+
+	// grab a connection
+	conn, err := db.Conn(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// start a transaction and read backend pid of our connection
+	tx, err := conn.BeginTx(ctx, &sql.TxOptions{
+		Isolation: sql.LevelDefault,
+		ReadOnly:  true,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rows, err := tx.Query("SELECT pg_backend_pid()")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer rows.Close()
+
+	// read the pid from result
+	var pid int
+	for rows.Next() {
+		if err := rows.Scan(&pid); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if rows.Err() != nil {
+		t.Fatal(err)
+	}
+	if err := tx.Rollback(); err != nil {
+		t.Fatal(err)
+	}
+
+	// kill the process which handles our connection and test if the ping fails
+	if _, err := db.Exec("SELECT pg_terminate_backend($1)", pid); err != nil {
+		t.Fatal(err)
+	}
+	if err := conn.PingContext(ctx); err != driver.ErrBadConn {
+		t.Fatalf("expected error %s, instead got %s", driver.ErrBadConn, err)
+	}
+}

vendor/github.com/lib/pq/hstore/hstore.go

@@ -0,0 +1,118 @@
+package hstore
+
+import (
+	"database/sql"
+	"database/sql/driver"
+	"strings"
+)
+
+// Hstore is a wrapper for transferring Hstore values back and forth easily.
+type Hstore struct {
+	Map map[string]sql.NullString
+}
+
+// escapes and quotes hstore keys/values
+// s should be a sql.NullString or string
+func hQuote(s interface{}) string {
+	var str string
+	switch v := s.(type) {
+	case sql.NullString:
+		if !v.Valid {
+			return "NULL"
+		}
+		str = v.String
+	case string:
+		str = v
+	default:
+		panic("not a string or sql.NullString")
+	}
+
+	str = strings.Replace(str, "\\", "\\\\", -1)
+	return `"` + strings.Replace(str, "\"", "\\\"", -1) + `"`
+}
+
+// Scan implements the Scanner interface.
+//
+// Note h.Map is reallocated before the scan to clear existing values. If the
+// hstore column's database value is NULL, then h.Map is set to nil instead.
+func (h *Hstore) Scan(value interface{}) error {
+	if value == nil {
+		h.Map = nil
+		return nil
+	}
+	h.Map = make(map[string]sql.NullString)
+	var b byte
+	pair := [][]byte{{}, {}}
+	pi := 0
+	inQuote := false
+	didQuote := false
+	sawSlash := false
+	bindex := 0
+	for bindex, b = range value.([]byte) {
+		if sawSlash {
+			pair[pi] = append(pair[pi], b)
+			sawSlash = false
+			continue
+		}
+
+		switch b {
+		case '\\':
+			sawSlash = true
+			continue
+		case '"':
+			inQuote = !inQuote
+			if !didQuote {
+				didQuote = true
+			}
+			continue
+		default:
+			if !inQuote {
+				switch b {
+				case ' ', '\t', '\n', '\r':
+					continue
+				case '=':
+					continue
+				case '>':
+					pi = 1
+					didQuote = false
+					continue
+				case ',':
+					s := string(pair[1])
+					if !didQuote && len(s) == 4 && strings.ToLower(s) == "null" {
+						h.Map[string(pair[0])] = sql.NullString{String: "", Valid: false}
+					} else {
+						h.Map[string(pair[0])] = sql.NullString{String: string(pair[1]), Valid: true}
+					}
+					pair[0] = []byte{}
+					pair[1] = []byte{}
+					pi = 0
+					continue
+				}
+			}
+		}
+		pair[pi] = append(pair[pi], b)
+	}
+	if bindex > 0 {
+		s := string(pair[1])
+		if !didQuote && len(s) == 4 && strings.ToLower(s) == "null" {
+			h.Map[string(pair[0])] = sql.NullString{String: "", Valid: false}
+		} else {
+			h.Map[string(pair[0])] = sql.NullString{String: string(pair[1]), Valid: true}
+		}
+	}
+	return nil
+}
+
+// Value implements the driver Valuer interface. Note if h.Map is nil, the
+// database column value will be set to NULL.
+func (h Hstore) Value() (driver.Value, error) {
+	if h.Map == nil {
+		return nil, nil
+	}
+	parts := []string{}
+	for key, val := range h.Map {
+		thispart := hQuote(key) + "=>" + hQuote(val)
+		parts = append(parts, thispart)
+	}
+	return []byte(strings.Join(parts, ",")), nil
+}

vendor/github.com/lib/pq/hstore/hstore_test.go

@@ -0,0 +1,148 @@
+package hstore
+
+import (
+	"database/sql"
+	"os"
+	"testing"
+
+	_ "github.com/lib/pq"
+)
+
+type Fatalistic interface {
+	Fatal(args ...interface{})
+}
+
+func openTestConn(t Fatalistic) *sql.DB {
+	datname := os.Getenv("PGDATABASE")
+	sslmode := os.Getenv("PGSSLMODE")
+
+	if datname == "" {
+		os.Setenv("PGDATABASE", "pqgotest")
+	}
+
+	if sslmode == "" {
+		os.Setenv("PGSSLMODE", "disable")
+	}
+
+	conn, err := sql.Open("postgres", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return conn
+}
+
+func TestHstore(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	// quitely create hstore if it doesn't exist
+	_, err := db.Exec("CREATE EXTENSION IF NOT EXISTS hstore")
+	if err != nil {
+		t.Skipf("Skipping hstore tests - hstore extension create failed: %s", err.Error())
+	}
+
+	hs := Hstore{}
+
+	// test for null-valued hstores
+	err = db.QueryRow("SELECT NULL::hstore").Scan(&hs)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if hs.Map != nil {
+		t.Fatalf("expected null map")
+	}
+
+	err = db.QueryRow("SELECT $1::hstore", hs).Scan(&hs)
+	if err != nil {
+		t.Fatalf("re-query null map failed: %s", err.Error())
+	}
+	if hs.Map != nil {
+		t.Fatalf("expected null map")
+	}
+
+	// test for empty hstores
+	err = db.QueryRow("SELECT ''::hstore").Scan(&hs)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if hs.Map == nil {
+		t.Fatalf("expected empty map, got null map")
+	}
+	if len(hs.Map) != 0 {
+		t.Fatalf("expected empty map, got len(map)=%d", len(hs.Map))
+	}
+
+	err = db.QueryRow("SELECT $1::hstore", hs).Scan(&hs)
+	if err != nil {
+		t.Fatalf("re-query empty map failed: %s", err.Error())
+	}
+	if hs.Map == nil {
+		t.Fatalf("expected empty map, got null map")
+	}
+	if len(hs.Map) != 0 {
+		t.Fatalf("expected empty map, got len(map)=%d", len(hs.Map))
+	}
+
+	// a few example maps to test out
+	hsOnePair := Hstore{
+		Map: map[string]sql.NullString{
+			"key1": {String: "value1", Valid: true},
+		},
+	}
+
+	hsThreePairs := Hstore{
+		Map: map[string]sql.NullString{
+			"key1": {String: "value1", Valid: true},
+			"key2": {String: "value2", Valid: true},
+			"key3": {String: "value3", Valid: true},
+		},
+	}
+
+	hsSmorgasbord := Hstore{
+		Map: map[string]sql.NullString{
+			"nullstring":             {String: "NULL", Valid: true},
+			"actuallynull":           {String: "", Valid: false},
+			"NULL":                   {String: "NULL string key", Valid: true},
+			"withbracket":            {String: "value>42", Valid: true},
+			"withequal":              {String: "value=42", Valid: true},
+			`"withquotes1"`:          {String: `this "should" be fine`, Valid: true},
+			`"withquotes"2"`:         {String: `this "should\" also be fine`, Valid: true},
+			"embedded1":              {String: "value1=>x1", Valid: true},
+			"embedded2":              {String: `"value2"=>x2`, Valid: true},
+			"withnewlines":           {String: "\n\nvalue\t=>2", Valid: true},
+			"<<all sorts of crazy>>": {String: `this, "should,\" also, => be fine`, Valid: true},
+		},
+	}
+
+	// test encoding in query params, then decoding during Scan
+	testBidirectional := func(h Hstore) {
+		err = db.QueryRow("SELECT $1::hstore", h).Scan(&hs)
+		if err != nil {
+			t.Fatalf("re-query %d-pair map failed: %s", len(h.Map), err.Error())
+		}
+		if hs.Map == nil {
+			t.Fatalf("expected %d-pair map, got null map", len(h.Map))
+		}
+		if len(hs.Map) != len(h.Map) {
+			t.Fatalf("expected %d-pair map, got len(map)=%d", len(h.Map), len(hs.Map))
+		}
+
+		for key, val := range hs.Map {
+			otherval, found := h.Map[key]
+			if !found {
+				t.Fatalf("  key '%v' not found in %d-pair map", key, len(h.Map))
+			}
+			if otherval.Valid != val.Valid {
+				t.Fatalf("  value %v <> %v in %d-pair map", otherval, val, len(h.Map))
+			}
+			if otherval.String != val.String {
+				t.Fatalf("  value '%v' <> '%v' in %d-pair map", otherval.String, val.String, len(h.Map))
+			}
+		}
+	}
+
+	testBidirectional(hsOnePair)
+	testBidirectional(hsThreePairs)
+	testBidirectional(hsSmorgasbord)
+}

vendor/github.com/lib/pq/issues_test.go

@@ -0,0 +1,26 @@
+package pq
+
+import "testing"
+
+func TestIssue494(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	query := `CREATE TEMP TABLE t (i INT PRIMARY KEY)`
+	if _, err := db.Exec(query); err != nil {
+		t.Fatal(err)
+	}
+
+	txn, err := db.Begin()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := txn.Prepare(CopyIn("t", "i")); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := txn.Query("SELECT 1"); err == nil {
+		t.Fatal("expected error")
+	}
+}

vendor/github.com/lib/pq/notify_test.go

@@ -0,0 +1,570 @@
+package pq
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"runtime"
+	"sync"
+	"testing"
+	"time"
+)
+
+var errNilNotification = errors.New("nil notification")
+
+func expectNotification(t *testing.T, ch <-chan *Notification, relname string, extra string) error {
+	select {
+	case n := <-ch:
+		if n == nil {
+			return errNilNotification
+		}
+		if n.Channel != relname || n.Extra != extra {
+			return fmt.Errorf("unexpected notification %v", n)
+		}
+		return nil
+	case <-time.After(1500 * time.Millisecond):
+		return fmt.Errorf("timeout")
+	}
+}
+
+func expectNoNotification(t *testing.T, ch <-chan *Notification) error {
+	select {
+	case n := <-ch:
+		return fmt.Errorf("unexpected notification %v", n)
+	case <-time.After(100 * time.Millisecond):
+		return nil
+	}
+}
+
+func expectEvent(t *testing.T, eventch <-chan ListenerEventType, et ListenerEventType) error {
+	select {
+	case e := <-eventch:
+		if e != et {
+			return fmt.Errorf("unexpected event %v", e)
+		}
+		return nil
+	case <-time.After(1500 * time.Millisecond):
+		panic("expectEvent timeout")
+	}
+}
+
+func expectNoEvent(t *testing.T, eventch <-chan ListenerEventType) error {
+	select {
+	case e := <-eventch:
+		return fmt.Errorf("unexpected event %v", e)
+	case <-time.After(100 * time.Millisecond):
+		return nil
+	}
+}
+
+func newTestListenerConn(t *testing.T) (*ListenerConn, <-chan *Notification) {
+	datname := os.Getenv("PGDATABASE")
+	sslmode := os.Getenv("PGSSLMODE")
+
+	if datname == "" {
+		os.Setenv("PGDATABASE", "pqgotest")
+	}
+
+	if sslmode == "" {
+		os.Setenv("PGSSLMODE", "disable")
+	}
+
+	notificationChan := make(chan *Notification)
+	l, err := NewListenerConn("", notificationChan)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return l, notificationChan
+}
+
+func TestNewListenerConn(t *testing.T) {
+	l, _ := newTestListenerConn(t)
+
+	defer l.Close()
+}
+
+func TestConnListen(t *testing.T) {
+	l, channel := newTestListenerConn(t)
+
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	ok, err := l.Listen("notify_test")
+	if !ok || err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, channel, "notify_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestConnUnlisten(t *testing.T) {
+	l, channel := newTestListenerConn(t)
+
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	ok, err := l.Listen("notify_test")
+	if !ok || err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, channel, "notify_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ok, err = l.Unlisten("notify_test")
+	if !ok || err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNoNotification(t, channel)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestConnUnlistenAll(t *testing.T) {
+	l, channel := newTestListenerConn(t)
+
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	ok, err := l.Listen("notify_test")
+	if !ok || err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, channel, "notify_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ok, err = l.UnlistenAll()
+	if !ok || err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNoNotification(t, channel)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestConnClose(t *testing.T) {
+	l, _ := newTestListenerConn(t)
+	defer l.Close()
+
+	err := l.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = l.Close()
+	if err != errListenerConnClosed {
+		t.Fatalf("expected errListenerConnClosed; got %v", err)
+	}
+}
+
+func TestConnPing(t *testing.T) {
+	l, _ := newTestListenerConn(t)
+	defer l.Close()
+	err := l.Ping()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = l.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = l.Ping()
+	if err != errListenerConnClosed {
+		t.Fatalf("expected errListenerConnClosed; got %v", err)
+	}
+}
+
+// Test for deadlock where a query fails while another one is queued
+func TestConnExecDeadlock(t *testing.T) {
+	l, _ := newTestListenerConn(t)
+	defer l.Close()
+
+	var wg sync.WaitGroup
+	wg.Add(2)
+
+	go func() {
+		l.ExecSimpleQuery("SELECT pg_sleep(60)")
+		wg.Done()
+	}()
+	runtime.Gosched()
+	go func() {
+		l.ExecSimpleQuery("SELECT 1")
+		wg.Done()
+	}()
+	// give the two goroutines some time to get into position
+	runtime.Gosched()
+	// calls Close on the net.Conn; equivalent to a network failure
+	l.Close()
+
+	defer time.AfterFunc(10*time.Second, func() {
+		panic("timed out")
+	}).Stop()
+	wg.Wait()
+}
+
+// Test for ListenerConn being closed while a slow query is executing
+func TestListenerConnCloseWhileQueryIsExecuting(t *testing.T) {
+	l, _ := newTestListenerConn(t)
+	defer l.Close()
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+
+	go func() {
+		sent, err := l.ExecSimpleQuery("SELECT pg_sleep(60)")
+		if sent {
+			panic("expected sent=false")
+		}
+		// could be any of a number of errors
+		if err == nil {
+			panic("expected error")
+		}
+		wg.Done()
+	}()
+	// give the above goroutine some time to get into position
+	runtime.Gosched()
+	err := l.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	defer time.AfterFunc(10*time.Second, func() {
+		panic("timed out")
+	}).Stop()
+	wg.Wait()
+}
+
+func TestNotifyExtra(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	if getServerVersion(t, db) < 90000 {
+		t.Skip("skipping NOTIFY payload test since the server does not appear to support it")
+	}
+
+	l, channel := newTestListenerConn(t)
+	defer l.Close()
+
+	ok, err := l.Listen("notify_test")
+	if !ok || err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_test, 'something'")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, channel, "notify_test", "something")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+// create a new test listener and also set the timeouts
+func newTestListenerTimeout(t *testing.T, min time.Duration, max time.Duration) (*Listener, <-chan ListenerEventType) {
+	datname := os.Getenv("PGDATABASE")
+	sslmode := os.Getenv("PGSSLMODE")
+
+	if datname == "" {
+		os.Setenv("PGDATABASE", "pqgotest")
+	}
+
+	if sslmode == "" {
+		os.Setenv("PGSSLMODE", "disable")
+	}
+
+	eventch := make(chan ListenerEventType, 16)
+	l := NewListener("", min, max, func(t ListenerEventType, err error) { eventch <- t })
+	err := expectEvent(t, eventch, ListenerEventConnected)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return l, eventch
+}
+
+func newTestListener(t *testing.T) (*Listener, <-chan ListenerEventType) {
+	return newTestListenerTimeout(t, time.Hour, time.Hour)
+}
+
+func TestListenerListen(t *testing.T) {
+	l, _ := newTestListener(t)
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	err := l.Listen("notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestListenerUnlisten(t *testing.T) {
+	l, _ := newTestListener(t)
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	err := l.Listen("notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = l.Unlisten("notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNoNotification(t, l.Notify)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestListenerUnlistenAll(t *testing.T) {
+	l, _ := newTestListener(t)
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	err := l.Listen("notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = l.UnlistenAll()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNoNotification(t, l.Notify)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestListenerFailedQuery(t *testing.T) {
+	l, eventch := newTestListener(t)
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	err := l.Listen("notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// shouldn't cause a disconnect
+	ok, err := l.cn.ExecSimpleQuery("SELECT error")
+	if !ok {
+		t.Fatalf("could not send query to server: %v", err)
+	}
+	_, ok = err.(PGError)
+	if !ok {
+		t.Fatalf("unexpected error %v", err)
+	}
+	err = expectNoEvent(t, eventch)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// should still work
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestListenerReconnect(t *testing.T) {
+	l, eventch := newTestListenerTimeout(t, 20*time.Millisecond, time.Hour)
+	defer l.Close()
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	err := l.Listen("notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// kill the connection and make sure it comes back up
+	ok, err := l.cn.ExecSimpleQuery("SELECT pg_terminate_backend(pg_backend_pid())")
+	if ok {
+		t.Fatalf("could not kill the connection: %v", err)
+	}
+	if err != io.EOF {
+		t.Fatalf("unexpected error %v", err)
+	}
+	err = expectEvent(t, eventch, ListenerEventDisconnected)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = expectEvent(t, eventch, ListenerEventReconnected)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// should still work
+	_, err = db.Exec("NOTIFY notify_listen_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// should get nil after Reconnected
+	err = expectNotification(t, l.Notify, "", "")
+	if err != errNilNotification {
+		t.Fatal(err)
+	}
+
+	err = expectNotification(t, l.Notify, "notify_listen_test", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestListenerClose(t *testing.T) {
+	l, _ := newTestListenerTimeout(t, 20*time.Millisecond, time.Hour)
+	defer l.Close()
+
+	err := l.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = l.Close()
+	if err != errListenerClosed {
+		t.Fatalf("expected errListenerClosed; got %v", err)
+	}
+}
+
+func TestListenerPing(t *testing.T) {
+	l, _ := newTestListenerTimeout(t, 20*time.Millisecond, time.Hour)
+	defer l.Close()
+
+	err := l.Ping()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = l.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = l.Ping()
+	if err != errListenerClosed {
+		t.Fatalf("expected errListenerClosed; got %v", err)
+	}
+}

vendor/github.com/lib/pq/rows_test.go

@@ -0,0 +1,218 @@
+package pq
+
+import (
+	"math"
+	"reflect"
+	"testing"
+
+	"github.com/lib/pq/oid"
+)
+
+func TestDataTypeName(t *testing.T) {
+	tts := []struct {
+		typ  oid.Oid
+		name string
+	}{
+		{oid.T_int8, "INT8"},
+		{oid.T_int4, "INT4"},
+		{oid.T_int2, "INT2"},
+		{oid.T_varchar, "VARCHAR"},
+		{oid.T_text, "TEXT"},
+		{oid.T_bool, "BOOL"},
+		{oid.T_numeric, "NUMERIC"},
+		{oid.T_date, "DATE"},
+		{oid.T_time, "TIME"},
+		{oid.T_timetz, "TIMETZ"},
+		{oid.T_timestamp, "TIMESTAMP"},
+		{oid.T_timestamptz, "TIMESTAMPTZ"},
+		{oid.T_bytea, "BYTEA"},
+	}
+
+	for i, tt := range tts {
+		dt := fieldDesc{OID: tt.typ}
+		if name := dt.Name(); name != tt.name {
+			t.Errorf("(%d) got: %s want: %s", i, name, tt.name)
+		}
+	}
+}
+
+func TestDataType(t *testing.T) {
+	tts := []struct {
+		typ  oid.Oid
+		kind reflect.Kind
+	}{
+		{oid.T_int8, reflect.Int64},
+		{oid.T_int4, reflect.Int32},
+		{oid.T_int2, reflect.Int16},
+		{oid.T_varchar, reflect.String},
+		{oid.T_text, reflect.String},
+		{oid.T_bool, reflect.Bool},
+		{oid.T_date, reflect.Struct},
+		{oid.T_time, reflect.Struct},
+		{oid.T_timetz, reflect.Struct},
+		{oid.T_timestamp, reflect.Struct},
+		{oid.T_timestamptz, reflect.Struct},
+		{oid.T_bytea, reflect.Slice},
+	}
+
+	for i, tt := range tts {
+		dt := fieldDesc{OID: tt.typ}
+		if kind := dt.Type().Kind(); kind != tt.kind {
+			t.Errorf("(%d) got: %s want: %s", i, kind, tt.kind)
+		}
+	}
+}
+
+func TestDataTypeLength(t *testing.T) {
+	tts := []struct {
+		typ    oid.Oid
+		len    int
+		mod    int
+		length int64
+		ok     bool
+	}{
+		{oid.T_int4, 0, -1, 0, false},
+		{oid.T_varchar, 65535, 9, 5, true},
+		{oid.T_text, 65535, -1, math.MaxInt64, true},
+		{oid.T_bytea, 65535, -1, math.MaxInt64, true},
+	}
+
+	for i, tt := range tts {
+		dt := fieldDesc{OID: tt.typ, Len: tt.len, Mod: tt.mod}
+		if l, k := dt.Length(); k != tt.ok || l != tt.length {
+			t.Errorf("(%d) got: %d, %t want: %d, %t", i, l, k, tt.length, tt.ok)
+		}
+	}
+}
+
+func TestDataTypePrecisionScale(t *testing.T) {
+	tts := []struct {
+		typ              oid.Oid
+		mod              int
+		precision, scale int64
+		ok               bool
+	}{
+		{oid.T_int4, -1, 0, 0, false},
+		{oid.T_numeric, 589830, 9, 2, true},
+		{oid.T_text, -1, 0, 0, false},
+	}
+
+	for i, tt := range tts {
+		dt := fieldDesc{OID: tt.typ, Mod: tt.mod}
+		p, s, k := dt.PrecisionScale()
+		if k != tt.ok {
+			t.Errorf("(%d) got: %t want: %t", i, k, tt.ok)
+		}
+		if p != tt.precision {
+			t.Errorf("(%d) wrong precision got: %d want: %d", i, p, tt.precision)
+		}
+		if s != tt.scale {
+			t.Errorf("(%d) wrong scale got: %d want: %d", i, s, tt.scale)
+		}
+	}
+}
+
+func TestRowsColumnTypes(t *testing.T) {
+	columnTypesTests := []struct {
+		Name     string
+		TypeName string
+		Length   struct {
+			Len int64
+			OK  bool
+		}
+		DecimalSize struct {
+			Precision int64
+			Scale     int64
+			OK        bool
+		}
+		ScanType reflect.Type
+	}{
+		{
+			Name:     "a",
+			TypeName: "INT4",
+			Length: struct {
+				Len int64
+				OK  bool
+			}{
+				Len: 0,
+				OK:  false,
+			},
+			DecimalSize: struct {
+				Precision int64
+				Scale     int64
+				OK        bool
+			}{
+				Precision: 0,
+				Scale:     0,
+				OK:        false,
+			},
+			ScanType: reflect.TypeOf(int32(0)),
+		}, {
+			Name:     "bar",
+			TypeName: "TEXT",
+			Length: struct {
+				Len int64
+				OK  bool
+			}{
+				Len: math.MaxInt64,
+				OK:  true,
+			},
+			DecimalSize: struct {
+				Precision int64
+				Scale     int64
+				OK        bool
+			}{
+				Precision: 0,
+				Scale:     0,
+				OK:        false,
+			},
+			ScanType: reflect.TypeOf(""),
+		},
+	}
+
+	db := openTestConn(t)
+	defer db.Close()
+
+	rows, err := db.Query("SELECT 1 AS a, text 'bar' AS bar, 1.28::numeric(9, 2) AS dec")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	columns, err := rows.ColumnTypes()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(columns) != 3 {
+		t.Errorf("expected 3 columns found %d", len(columns))
+	}
+
+	for i, tt := range columnTypesTests {
+		c := columns[i]
+		if c.Name() != tt.Name {
+			t.Errorf("(%d) got: %s, want: %s", i, c.Name(), tt.Name)
+		}
+		if c.DatabaseTypeName() != tt.TypeName {
+			t.Errorf("(%d) got: %s, want: %s", i, c.DatabaseTypeName(), tt.TypeName)
+		}
+		l, ok := c.Length()
+		if l != tt.Length.Len {
+			t.Errorf("(%d) got: %d, want: %d", i, l, tt.Length.Len)
+		}
+		if ok != tt.Length.OK {
+			t.Errorf("(%d) got: %t, want: %t", i, ok, tt.Length.OK)
+		}
+		p, s, ok := c.DecimalSize()
+		if p != tt.DecimalSize.Precision {
+			t.Errorf("(%d) got: %d, want: %d", i, p, tt.DecimalSize.Precision)
+		}
+		if s != tt.DecimalSize.Scale {
+			t.Errorf("(%d) got: %d, want: %d", i, s, tt.DecimalSize.Scale)
+		}
+		if ok != tt.DecimalSize.OK {
+			t.Errorf("(%d) got: %t, want: %t", i, ok, tt.DecimalSize.OK)
+		}
+		if c.ScanType() != tt.ScanType {
+			t.Errorf("(%d) got: %v, want: %v", i, c.ScanType(), tt.ScanType)
+		}
+	}
+}

vendor/github.com/lib/pq/scram/scram.go

@@ -0,0 +1,264 @@
+// Copyright (c) 2014 - Gustavo Niemeyer <gustavo@niemeyer.net>
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this
+//    list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright notice,
+//    this list of conditions and the following disclaimer in the documentation
+//    and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Pacakage scram implements a SCRAM-{SHA-1,etc} client per RFC5802.
+//
+// http://tools.ietf.org/html/rfc5802
+//
+package scram
+
+import (
+	"bytes"
+	"crypto/hmac"
+	"crypto/rand"
+	"encoding/base64"
+	"fmt"
+	"hash"
+	"strconv"
+	"strings"
+)
+
+// Client implements a SCRAM-* client (SCRAM-SHA-1, SCRAM-SHA-256, etc).
+//
+// A Client may be used within a SASL conversation with logic resembling:
+//
+//    var in []byte
+//    var client = scram.NewClient(sha1.New, user, pass)
+//    for client.Step(in) {
+//            out := client.Out()
+//            // send out to server
+//            in := serverOut
+//    }
+//    if client.Err() != nil {
+//            // auth failed
+//    }
+//
+type Client struct {
+	newHash func() hash.Hash
+
+	user string
+	pass string
+	step int
+	out  bytes.Buffer
+	err  error
+
+	clientNonce []byte
+	serverNonce []byte
+	saltedPass  []byte
+	authMsg     bytes.Buffer
+}
+
+// NewClient returns a new SCRAM-* client with the provided hash algorithm.
+//
+// For SCRAM-SHA-256, for example, use:
+//
+//    client := scram.NewClient(sha256.New, user, pass)
+//
+func NewClient(newHash func() hash.Hash, user, pass string) *Client {
+	c := &Client{
+		newHash: newHash,
+		user:    user,
+		pass:    pass,
+	}
+	c.out.Grow(256)
+	c.authMsg.Grow(256)
+	return c
+}
+
+// Out returns the data to be sent to the server in the current step.
+func (c *Client) Out() []byte {
+	if c.out.Len() == 0 {
+		return nil
+	}
+	return c.out.Bytes()
+}
+
+// Err returns the error that ocurred, or nil if there were no errors.
+func (c *Client) Err() error {
+	return c.err
+}
+
+// SetNonce sets the client nonce to the provided value.
+// If not set, the nonce is generated automatically out of crypto/rand on the first step.
+func (c *Client) SetNonce(nonce []byte) {
+	c.clientNonce = nonce
+}
+
+var escaper = strings.NewReplacer("=", "=3D", ",", "=2C")
+
+// Step processes the incoming data from the server and makes the
+// next round of data for the server available via Client.Out.
+// Step returns false if there are no errors and more data is
+// still expected.
+func (c *Client) Step(in []byte) bool {
+	c.out.Reset()
+	if c.step > 2 || c.err != nil {
+		return false
+	}
+	c.step++
+	switch c.step {
+	case 1:
+		c.err = c.step1(in)
+	case 2:
+		c.err = c.step2(in)
+	case 3:
+		c.err = c.step3(in)
+	}
+	return c.step > 2 || c.err != nil
+}
+
+func (c *Client) step1(in []byte) error {
+	if len(c.clientNonce) == 0 {
+		const nonceLen = 16
+		buf := make([]byte, nonceLen+b64.EncodedLen(nonceLen))
+		if _, err := rand.Read(buf[:nonceLen]); err != nil {
+			return fmt.Errorf("cannot read random SCRAM-SHA-256 nonce from operating system: %v", err)
+		}
+		c.clientNonce = buf[nonceLen:]
+		b64.Encode(c.clientNonce, buf[:nonceLen])
+	}
+	c.authMsg.WriteString("n=")
+	escaper.WriteString(&c.authMsg, c.user)
+	c.authMsg.WriteString(",r=")
+	c.authMsg.Write(c.clientNonce)
+
+	c.out.WriteString("n,,")
+	c.out.Write(c.authMsg.Bytes())
+	return nil
+}
+
+var b64 = base64.StdEncoding
+
+func (c *Client) step2(in []byte) error {
+	c.authMsg.WriteByte(',')
+	c.authMsg.Write(in)
+
+	fields := bytes.Split(in, []byte(","))
+	if len(fields) != 3 {
+		return fmt.Errorf("expected 3 fields in first SCRAM-SHA-256 server message, got %d: %q", len(fields), in)
+	}
+	if !bytes.HasPrefix(fields[0], []byte("r=")) || len(fields[0]) < 2 {
+		return fmt.Errorf("server sent an invalid SCRAM-SHA-256 nonce: %q", fields[0])
+	}
+	if !bytes.HasPrefix(fields[1], []byte("s=")) || len(fields[1]) < 6 {
+		return fmt.Errorf("server sent an invalid SCRAM-SHA-256 salt: %q", fields[1])
+	}
+	if !bytes.HasPrefix(fields[2], []byte("i=")) || len(fields[2]) < 6 {
+		return fmt.Errorf("server sent an invalid SCRAM-SHA-256 iteration count: %q", fields[2])
+	}
+
+	c.serverNonce = fields[0][2:]
+	if !bytes.HasPrefix(c.serverNonce, c.clientNonce) {
+		return fmt.Errorf("server SCRAM-SHA-256 nonce is not prefixed by client nonce: got %q, want %q+\"...\"", c.serverNonce, c.clientNonce)
+	}
+
+	salt := make([]byte, b64.DecodedLen(len(fields[1][2:])))
+	n, err := b64.Decode(salt, fields[1][2:])
+	if err != nil {
+		return fmt.Errorf("cannot decode SCRAM-SHA-256 salt sent by server: %q", fields[1])
+	}
+	salt = salt[:n]
+	iterCount, err := strconv.Atoi(string(fields[2][2:]))
+	if err != nil {
+		return fmt.Errorf("server sent an invalid SCRAM-SHA-256 iteration count: %q", fields[2])
+	}
+	c.saltPassword(salt, iterCount)
+
+	c.authMsg.WriteString(",c=biws,r=")
+	c.authMsg.Write(c.serverNonce)
+
+	c.out.WriteString("c=biws,r=")
+	c.out.Write(c.serverNonce)
+	c.out.WriteString(",p=")
+	c.out.Write(c.clientProof())
+	return nil
+}
+
+func (c *Client) step3(in []byte) error {
+	var isv, ise bool
+	var fields = bytes.Split(in, []byte(","))
+	if len(fields) == 1 {
+		isv = bytes.HasPrefix(fields[0], []byte("v="))
+		ise = bytes.HasPrefix(fields[0], []byte("e="))
+	}
+	if ise {
+		return fmt.Errorf("SCRAM-SHA-256 authentication error: %s", fields[0][2:])
+	} else if !isv {
+		return fmt.Errorf("unsupported SCRAM-SHA-256 final message from server: %q", in)
+	}
+	if !bytes.Equal(c.serverSignature(), fields[0][2:]) {
+		return fmt.Errorf("cannot authenticate SCRAM-SHA-256 server signature: %q", fields[0][2:])
+	}
+	return nil
+}
+
+func (c *Client) saltPassword(salt []byte, iterCount int) {
+	mac := hmac.New(c.newHash, []byte(c.pass))
+	mac.Write(salt)
+	mac.Write([]byte{0, 0, 0, 1})
+	ui := mac.Sum(nil)
+	hi := make([]byte, len(ui))
+	copy(hi, ui)
+	for i := 1; i < iterCount; i++ {
+		mac.Reset()
+		mac.Write(ui)
+		mac.Sum(ui[:0])
+		for j, b := range ui {
+			hi[j] ^= b
+		}
+	}
+	c.saltedPass = hi
+}
+
+func (c *Client) clientProof() []byte {
+	mac := hmac.New(c.newHash, c.saltedPass)
+	mac.Write([]byte("Client Key"))
+	clientKey := mac.Sum(nil)
+	hash := c.newHash()
+	hash.Write(clientKey)
+	storedKey := hash.Sum(nil)
+	mac = hmac.New(c.newHash, storedKey)
+	mac.Write(c.authMsg.Bytes())
+	clientProof := mac.Sum(nil)
+	for i, b := range clientKey {
+		clientProof[i] ^= b
+	}
+	clientProof64 := make([]byte, b64.EncodedLen(len(clientProof)))
+	b64.Encode(clientProof64, clientProof)
+	return clientProof64
+}
+
+func (c *Client) serverSignature() []byte {
+	mac := hmac.New(c.newHash, c.saltedPass)
+	mac.Write([]byte("Server Key"))
+	serverKey := mac.Sum(nil)
+
+	mac = hmac.New(c.newHash, serverKey)
+	mac.Write(c.authMsg.Bytes())
+	serverSignature := mac.Sum(nil)
+
+	encoded := make([]byte, b64.EncodedLen(len(serverSignature)))
+	b64.Encode(encoded, serverSignature)
+	return encoded
+}

vendor/github.com/lib/pq/ssl.go

@@ -58,7 +58,13 @@ func ssl(o values) (func(net.Conn) (net.Conn, error), error) {
 	if err != nil {
 		return nil, err
 	}
-	sslRenegotiation(&tlsConf)
+
+	// Accept renegotiation requests initiated by the backend.
+	//
+	// Renegotiation was deprecated then removed from PostgreSQL 9.5, but
+	// the default configuration of older versions has it enabled. Redshift
+	// also initiates renegotiations and cannot be reconfigured.
+	tlsConf.Renegotiation = tls.RenegotiateFreelyAsClient
 
 	return func(conn net.Conn) (net.Conn, error) {
 		client := tls.Client(conn, &tlsConf)

vendor/github.com/lib/pq/ssl_go1.7.go

@@ -1,14 +0,0 @@
-// +build go1.7
-
-package pq
-
-import "crypto/tls"
-
-// Accept renegotiation requests initiated by the backend.
-//
-// Renegotiation was deprecated then removed from PostgreSQL 9.5, but
-// the default configuration of older versions has it enabled. Redshift
-// also initiates renegotiations and cannot be reconfigured.
-func sslRenegotiation(conf *tls.Config) {
-	conf.Renegotiation = tls.RenegotiateFreelyAsClient
-}

vendor/github.com/lib/pq/ssl_renegotiation.go

@@ -1,8 +0,0 @@
-// +build !go1.7
-
-package pq
-
-import "crypto/tls"
-
-// Renegotiation is not supported by crypto/tls until Go 1.7.
-func sslRenegotiation(*tls.Config) {}

vendor/github.com/lib/pq/ssl_test.go

@@ -0,0 +1,279 @@
+package pq
+
+// This file contains SSL tests
+
+import (
+	_ "crypto/sha256"
+	"crypto/x509"
+	"database/sql"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func maybeSkipSSLTests(t *testing.T) {
+	// Require some special variables for testing certificates
+	if os.Getenv("PQSSLCERTTEST_PATH") == "" {
+		t.Skip("PQSSLCERTTEST_PATH not set, skipping SSL tests")
+	}
+
+	value := os.Getenv("PQGOSSLTESTS")
+	if value == "" || value == "0" {
+		t.Skip("PQGOSSLTESTS not enabled, skipping SSL tests")
+	} else if value != "1" {
+		t.Fatalf("unexpected value %q for PQGOSSLTESTS", value)
+	}
+}
+
+func openSSLConn(t *testing.T, conninfo string) (*sql.DB, error) {
+	db, err := openTestConnConninfo(conninfo)
+	if err != nil {
+		// should never fail
+		t.Fatal(err)
+	}
+	// Do something with the connection to see whether it's working or not.
+	tx, err := db.Begin()
+	if err == nil {
+		return db, tx.Rollback()
+	}
+	_ = db.Close()
+	return nil, err
+}
+
+func checkSSLSetup(t *testing.T, conninfo string) {
+	_, err := openSSLConn(t, conninfo)
+	if pge, ok := err.(*Error); ok {
+		if pge.Code.Name() != "invalid_authorization_specification" {
+			t.Fatalf("unexpected error code '%s'", pge.Code.Name())
+		}
+	} else {
+		t.Fatalf("expected %T, got %v", (*Error)(nil), err)
+	}
+}
+
+// Connect over SSL and run a simple query to test the basics
+func TestSSLConnection(t *testing.T) {
+	maybeSkipSSLTests(t)
+	// Environment sanity check: should fail without SSL
+	checkSSLSetup(t, "sslmode=disable user=pqgossltest")
+
+	db, err := openSSLConn(t, "sslmode=require user=pqgossltest")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rows, err := db.Query("SELECT 1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rows.Close()
+}
+
+// Test sslmode=verify-full
+func TestSSLVerifyFull(t *testing.T) {
+	maybeSkipSSLTests(t)
+	// Environment sanity check: should fail without SSL
+	checkSSLSetup(t, "sslmode=disable user=pqgossltest")
+
+	// Not OK according to the system CA
+	_, err := openSSLConn(t, "host=postgres sslmode=verify-full user=pqgossltest")
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	_, ok := err.(x509.UnknownAuthorityError)
+	if !ok {
+		t.Fatalf("expected x509.UnknownAuthorityError, got %#+v", err)
+	}
+
+	rootCertPath := filepath.Join(os.Getenv("PQSSLCERTTEST_PATH"), "root.crt")
+	rootCert := "sslrootcert=" + rootCertPath + " "
+	// No match on Common Name
+	_, err = openSSLConn(t, rootCert+"host=127.0.0.1 sslmode=verify-full user=pqgossltest")
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	_, ok = err.(x509.HostnameError)
+	if !ok {
+		t.Fatalf("expected x509.HostnameError, got %#+v", err)
+	}
+	// OK
+	_, err = openSSLConn(t, rootCert+"host=postgres sslmode=verify-full user=pqgossltest")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+// Test sslmode=require sslrootcert=rootCertPath
+func TestSSLRequireWithRootCert(t *testing.T) {
+	maybeSkipSSLTests(t)
+	// Environment sanity check: should fail without SSL
+	checkSSLSetup(t, "sslmode=disable user=pqgossltest")
+
+	bogusRootCertPath := filepath.Join(os.Getenv("PQSSLCERTTEST_PATH"), "bogus_root.crt")
+	bogusRootCert := "sslrootcert=" + bogusRootCertPath + " "
+
+	// Not OK according to the bogus CA
+	_, err := openSSLConn(t, bogusRootCert+"host=postgres sslmode=require user=pqgossltest")
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	_, ok := err.(x509.UnknownAuthorityError)
+	if !ok {
+		t.Fatalf("expected x509.UnknownAuthorityError, got %s, %#+v", err, err)
+	}
+
+	nonExistentCertPath := filepath.Join(os.Getenv("PQSSLCERTTEST_PATH"), "non_existent.crt")
+	nonExistentCert := "sslrootcert=" + nonExistentCertPath + " "
+
+	// No match on Common Name, but that's OK because we're not validating anything.
+	_, err = openSSLConn(t, nonExistentCert+"host=127.0.0.1 sslmode=require user=pqgossltest")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rootCertPath := filepath.Join(os.Getenv("PQSSLCERTTEST_PATH"), "root.crt")
+	rootCert := "sslrootcert=" + rootCertPath + " "
+
+	// No match on Common Name, but that's OK because we're not validating the CN.
+	_, err = openSSLConn(t, rootCert+"host=127.0.0.1 sslmode=require user=pqgossltest")
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Everything OK
+	_, err = openSSLConn(t, rootCert+"host=postgres sslmode=require user=pqgossltest")
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+// Test sslmode=verify-ca
+func TestSSLVerifyCA(t *testing.T) {
+	maybeSkipSSLTests(t)
+	// Environment sanity check: should fail without SSL
+	checkSSLSetup(t, "sslmode=disable user=pqgossltest")
+
+	// Not OK according to the system CA
+	{
+		_, err := openSSLConn(t, "host=postgres sslmode=verify-ca user=pqgossltest")
+		if _, ok := err.(x509.UnknownAuthorityError); !ok {
+			t.Fatalf("expected %T, got %#+v", x509.UnknownAuthorityError{}, err)
+		}
+	}
+
+	// Still not OK according to the system CA; empty sslrootcert is treated as unspecified.
+	{
+		_, err := openSSLConn(t, "host=postgres sslmode=verify-ca user=pqgossltest sslrootcert=''")
+		if _, ok := err.(x509.UnknownAuthorityError); !ok {
+			t.Fatalf("expected %T, got %#+v", x509.UnknownAuthorityError{}, err)
+		}
+	}
+
+	rootCertPath := filepath.Join(os.Getenv("PQSSLCERTTEST_PATH"), "root.crt")
+	rootCert := "sslrootcert=" + rootCertPath + " "
+	// No match on Common Name, but that's OK
+	if _, err := openSSLConn(t, rootCert+"host=127.0.0.1 sslmode=verify-ca user=pqgossltest"); err != nil {
+		t.Fatal(err)
+	}
+	// Everything OK
+	if _, err := openSSLConn(t, rootCert+"host=postgres sslmode=verify-ca user=pqgossltest"); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// Authenticate over SSL using client certificates
+func TestSSLClientCertificates(t *testing.T) {
+	maybeSkipSSLTests(t)
+	// Environment sanity check: should fail without SSL
+	checkSSLSetup(t, "sslmode=disable user=pqgossltest")
+
+	const baseinfo = "sslmode=require user=pqgosslcert"
+
+	// Certificate not specified, should fail
+	{
+		_, err := openSSLConn(t, baseinfo)
+		if pge, ok := err.(*Error); ok {
+			if pge.Code.Name() != "invalid_authorization_specification" {
+				t.Fatalf("unexpected error code '%s'", pge.Code.Name())
+			}
+		} else {
+			t.Fatalf("expected %T, got %v", (*Error)(nil), err)
+		}
+	}
+
+	// Empty certificate specified, should fail
+	{
+		_, err := openSSLConn(t, baseinfo+" sslcert=''")
+		if pge, ok := err.(*Error); ok {
+			if pge.Code.Name() != "invalid_authorization_specification" {
+				t.Fatalf("unexpected error code '%s'", pge.Code.Name())
+			}
+		} else {
+			t.Fatalf("expected %T, got %v", (*Error)(nil), err)
+		}
+	}
+
+	// Non-existent certificate specified, should fail
+	{
+		_, err := openSSLConn(t, baseinfo+" sslcert=/tmp/filedoesnotexist")
+		if pge, ok := err.(*Error); ok {
+			if pge.Code.Name() != "invalid_authorization_specification" {
+				t.Fatalf("unexpected error code '%s'", pge.Code.Name())
+			}
+		} else {
+			t.Fatalf("expected %T, got %v", (*Error)(nil), err)
+		}
+	}
+
+	certpath, ok := os.LookupEnv("PQSSLCERTTEST_PATH")
+	if !ok {
+		t.Fatalf("PQSSLCERTTEST_PATH not present in environment")
+	}
+
+	sslcert := filepath.Join(certpath, "postgresql.crt")
+
+	// Cert present, key not specified, should fail
+	{
+		_, err := openSSLConn(t, baseinfo+" sslcert="+sslcert)
+		if _, ok := err.(*os.PathError); !ok {
+			t.Fatalf("expected %T, got %#+v", (*os.PathError)(nil), err)
+		}
+	}
+
+	// Cert present, empty key specified, should fail
+	{
+		_, err := openSSLConn(t, baseinfo+" sslcert="+sslcert+" sslkey=''")
+		if _, ok := err.(*os.PathError); !ok {
+			t.Fatalf("expected %T, got %#+v", (*os.PathError)(nil), err)
+		}
+	}
+
+	// Cert present, non-existent key, should fail
+	{
+		_, err := openSSLConn(t, baseinfo+" sslcert="+sslcert+" sslkey=/tmp/filedoesnotexist")
+		if _, ok := err.(*os.PathError); !ok {
+			t.Fatalf("expected %T, got %#+v", (*os.PathError)(nil), err)
+		}
+	}
+
+	// Key has wrong permissions (passing the cert as the key), should fail
+	if _, err := openSSLConn(t, baseinfo+" sslcert="+sslcert+" sslkey="+sslcert); err != ErrSSLKeyHasWorldPermissions {
+		t.Fatalf("expected %s, got %#+v", ErrSSLKeyHasWorldPermissions, err)
+	}
+
+	sslkey := filepath.Join(certpath, "postgresql.key")
+
+	// Should work
+	if db, err := openSSLConn(t, baseinfo+" sslcert="+sslcert+" sslkey="+sslkey); err != nil {
+		t.Fatal(err)
+	} else {
+		rows, err := db.Query("SELECT 1")
+		if err != nil {
+			t.Fatal(err)
+		}
+		if err := rows.Close(); err != nil {
+			t.Fatal(err)
+		}
+		if err := db.Close(); err != nil {
+			t.Fatal(err)
+		}
+	}
+}

vendor/github.com/lib/pq/url_test.go

@@ -0,0 +1,66 @@
+package pq
+
+import (
+	"testing"
+)
+
+func TestSimpleParseURL(t *testing.T) {
+	expected := "host=hostname.remote"
+	str, err := ParseURL("postgres://hostname.remote")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if str != expected {
+		t.Fatalf("unexpected result from ParseURL:\n+ %v\n- %v", str, expected)
+	}
+}
+
+func TestIPv6LoopbackParseURL(t *testing.T) {
+	expected := "host=::1 port=1234"
+	str, err := ParseURL("postgres://[::1]:1234")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if str != expected {
+		t.Fatalf("unexpected result from ParseURL:\n+ %v\n- %v", str, expected)
+	}
+}
+
+func TestFullParseURL(t *testing.T) {
+	expected := `dbname=database host=hostname.remote password=top\ secret port=1234 user=username`
+	str, err := ParseURL("postgres://username:top%20secret@hostname.remote:1234/database")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if str != expected {
+		t.Fatalf("unexpected result from ParseURL:\n+ %s\n- %s", str, expected)
+	}
+}
+
+func TestInvalidProtocolParseURL(t *testing.T) {
+	_, err := ParseURL("http://hostname.remote")
+	switch err {
+	case nil:
+		t.Fatal("Expected an error from parsing invalid protocol")
+	default:
+		msg := "invalid connection protocol: http"
+		if err.Error() != msg {
+			t.Fatalf("Unexpected error message:\n+ %s\n- %s",
+				err.Error(), msg)
+		}
+	}
+}
+
+func TestMinimalURL(t *testing.T) {
+	cs, err := ParseURL("postgres://")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if cs != "" {
+		t.Fatalf("expected blank connection string, got: %q", cs)
+	}
+}

vendor/github.com/lib/pq/uuid_test.go

@@ -0,0 +1,46 @@
+package pq
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestDecodeUUIDBinaryError(t *testing.T) {
+	t.Parallel()
+	_, err := decodeUUIDBinary([]byte{0x12, 0x34})
+
+	if err == nil {
+		t.Fatal("Expected error, got none")
+	}
+	if !strings.HasPrefix(err.Error(), "pq:") {
+		t.Errorf("Expected error to start with %q, got %q", "pq:", err.Error())
+	}
+	if !strings.Contains(err.Error(), "bad length: 2") {
+		t.Errorf("Expected error to contain length, got %q", err.Error())
+	}
+}
+
+func BenchmarkDecodeUUIDBinary(b *testing.B) {
+	x := []byte{0x03, 0xa3, 0x52, 0x2f, 0x89, 0x28, 0x49, 0x87, 0x84, 0xd6, 0x93, 0x7b, 0x36, 0xec, 0x27, 0x6f}
+
+	for i := 0; i < b.N; i++ {
+		decodeUUIDBinary(x)
+	}
+}
+
+func TestDecodeUUIDBackend(t *testing.T) {
+	db := openTestConn(t)
+	defer db.Close()
+
+	var s = "a0ecc91d-a13f-4fe4-9fce-7e09777cc70a"
+	var scanned interface{}
+
+	err := db.QueryRow(`SELECT $1::uuid`, s).Scan(&scanned)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if !reflect.DeepEqual(scanned, []byte(s)) {
+		t.Errorf("Expected []byte(%q), got %T(%q)", s, scanned, scanned)
+	}
+}