exp/sql: add time.Time support

Fixes #2694

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5541057

src/pkg/exp/sql/convert_test.go

@@ -8,8 +8,11 @@ import (
 	"fmt"
 	"reflect"
 	"testing"
+	"time"
 )
 
+var someTime = time.Unix(123, 0)
+
 type conversionTest struct {
 	s, d interface{} // source and destination
 
@@ -19,6 +22,7 @@ type conversionTest struct {
 	wantstr  string
 	wantf32  float32
 	wantf64  float64
+	wanttime time.Time
 	wantbool bool // used if d is of type *bool
 	wanterr  string
 }
@@ -35,12 +39,14 @@ var (
 	scanbool   bool
 	scanf32    float32
 	scanf64    float64
+	scantime   time.Time
 )
 
 var conversionTests = []conversionTest{
 	// Exact conversions (destination pointer type matches source type)
 	{s: "foo", d: &scanstr, wantstr: "foo"},
 	{s: 123, d: &scanint, wantint: 123},
+	{s: someTime, d: &scantime, wanttime: someTime},
 
 	// To strings
 	{s: []byte("byteslice"), d: &scanstr, wantstr: "byteslice"},
@@ -106,6 +112,10 @@ func float32Value(ptr interface{}) float32 {
 	return *(ptr.(*float32))
 }
 
+func timeValue(ptr interface{}) time.Time {
+	return *(ptr.(*time.Time))
+}
+
 func TestConversions(t *testing.T) {
 	for n, ct := range conversionTests {
 		err := convertAssign(ct.d, ct.s)
@@ -138,6 +148,9 @@ func TestConversions(t *testing.T) {
 		if bp, boolTest := ct.d.(*bool); boolTest && *bp != ct.wantbool && ct.wanterr == "" {
 			errf("want bool %v, got %v", ct.wantbool, *bp)
 		}
+		if !ct.wanttime.IsZero() && !ct.wanttime.Equal(timeValue(ct.d)) {
+			errf("want time %v, got %v", ct.wanttime, timeValue(ct.d))
+		}
 	}
 }
 

src/pkg/exp/sql/driver/driver.go

@@ -16,6 +16,7 @@
 //   nil
 //   []byte
 //   string   [*] everywhere except from Rows.Next.
+//   time.Time
 //
 package driver
 

src/pkg/exp/sql/driver/types.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"reflect"
 	"strconv"
+	"time"
 )
 
 // ValueConverter is the interface providing the ConvertValue method.
@@ -143,9 +144,10 @@ func (stringType) ConvertValue(v interface{}) (interface{}, error) {
 //   bool
 //   nil
 //   []byte
+//   time.Time
 //   string
 //
-// This is the ame list as IsScanSubsetType, with the addition of
+// This is the same list as IsScanSubsetType, with the addition of
 // string.
 func IsParameterSubsetType(v interface{}) bool {
 	if IsScanSubsetType(v) {
@@ -165,6 +167,7 @@ func IsParameterSubsetType(v interface{}) bool {
 //   bool
 //   nil
 //   []byte
+//   time.Time
 //
 // This is the same list as IsParameterSubsetType, without string.
 func IsScanSubsetType(v interface{}) bool {
@@ -172,7 +175,7 @@ func IsScanSubsetType(v interface{}) bool {
 		return true
 	}
 	switch v.(type) {
-	case int64, float64, []byte, bool:
+	case int64, float64, []byte, bool, time.Time:
 		return true
 	}
 	return false

src/pkg/exp/sql/driver/types_test.go

@@ -7,6 +7,7 @@ package driver
 import (
 	"reflect"
 	"testing"
+	"time"
 )
 
 type valueConverterTest struct {
@@ -16,6 +17,8 @@ type valueConverterTest struct {
 	err string
 }
 
+var now = time.Now()
+
 var valueConverterTests = []valueConverterTest{
 	{Bool, "true", true, ""},
 	{Bool, "True", true, ""},
@@ -33,6 +36,7 @@ var valueConverterTests = []valueConverterTest{
 	{Bool, uint16(0), false, ""},
 	{c: Bool, in: "foo", err: "sql/driver: couldn't convert \"foo\" into type bool"},
 	{c: Bool, in: 2, err: "sql/driver: couldn't convert 2 into type bool"},
+	{DefaultParameterConverter, now, now, ""},
 }
 
 func TestValueConverters(t *testing.T) {

src/pkg/exp/sql/fakedb_test.go

@@ -12,6 +12,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"exp/sql/driver"
 )
@@ -220,7 +221,7 @@ func (c *fakeConn) Close() error {
 func checkSubsetTypes(args []interface{}) error {
 	for n, arg := range args {
 		switch arg.(type) {
-		case int64, float64, bool, nil, []byte, string:
+		case int64, float64, bool, nil, []byte, string, time.Time:
 		default:
 			return fmt.Errorf("fakedb_test: invalid argument #%d: %v, type %T", n+1, arg, arg)
 		}
@@ -589,6 +590,8 @@ func converterForType(typ string) driver.ValueConverter {
 		return driver.Int32
 	case "string":
 		return driver.String
+	case "datetime":
+		return driver.DefaultParameterConverter
 	}
 	panic("invalid fakedb column type of " + typ)
 }

src/pkg/exp/sql/sql_test.go

@@ -8,10 +8,13 @@ import (
 	"reflect"
 	"strings"
 	"testing"
+	"time"
 )
 
 const fakeDBName = "foo"
 
+var chrisBirthday = time.Unix(123456789, 0)
+
 func newTestDB(t *testing.T, name string) *DB {
 	db, err := Open("test", fakeDBName)
 	if err != nil {
@@ -21,10 +24,10 @@ func newTestDB(t *testing.T, name string) *DB {
 		t.Fatalf("exec wipe: %v", err)
 	}
 	if name == "people" {
-		exec(t, db, "CREATE|people|name=string,age=int32,photo=blob,dead=bool")
+		exec(t, db, "CREATE|people|name=string,age=int32,photo=blob,dead=bool,bdate=datetime")
 		exec(t, db, "INSERT|people|name=Alice,age=?,photo=APHOTO", 1)
 		exec(t, db, "INSERT|people|name=Bob,age=?,photo=BPHOTO", 2)
-		exec(t, db, "INSERT|people|name=Chris,age=?,photo=CPHOTO", 3)
+		exec(t, db, "INSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?", 3, chrisBirthday)
 	}
 	return db
 }
@@ -105,12 +108,18 @@ func TestQueryRow(t *testing.T) {
 	defer closeDB(t, db)
 	var name string
 	var age int
+	var birthday time.Time
 
 	err := db.QueryRow("SELECT|people|age,name|age=?", 3).Scan(&age)
 	if err == nil || !strings.Contains(err.Error(), "expected 2 destination arguments") {
 		t.Errorf("expected error from wrong number of arguments; actually got: %v", err)
 	}
 
+	err = db.QueryRow("SELECT|people|bdate|age=?", 3).Scan(&birthday)
+	if err != nil || !birthday.Equal(chrisBirthday) {
+		t.Errorf("chris birthday = %v, err = %v; want %v", birthday, err, chrisBirthday)
+	}
+
 	err = db.QueryRow("SELECT|people|age,name|age=?", 2).Scan(&age, &name)
 	if err != nil {
 		t.Fatalf("age QueryRow+Scan: %v", err)