fix: Postgres DB with non-UTC timezone incorrectly parse in timestamp…

…tz fields (#252)

dialect/postgresql.go

@@ -25,7 +25,7 @@ func (d postgreSQL) EncodeBool(b bool) string {
 }
 
 func (d postgreSQL) EncodeTime(t time.Time) string {
-	return MySQL.EncodeTime(t)
+	return `'` + t.Format(time.RFC3339Nano) + `'`
 }
 
 func (d postgreSQL) EncodeBytes(b []byte) string {

dialect/postgresql_test.go

@@ -0,0 +1,33 @@
+package dialect
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+	"time"
+)
+
+func TestEncodeTime(t *testing.T) {
+	for _, test := range []struct {
+		in   time.Time
+		want string
+	}{
+		{
+			in:   time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC),
+			want: `'2009-11-10T23:00:00Z'`,
+		},
+		{
+			in:   time.Date(2009, time.November, 10, 15, 0, 0, 0, time.FixedZone("UTC-8", -8*60*60)),
+			want: `'2009-11-10T15:00:00-08:00'`,
+		},
+		{
+			in:   time.Date(2009, time.November, 11, 07, 0, 0, 0, time.FixedZone("UTC+8", 8*60*60)),
+			want: `'2009-11-11T07:00:00+08:00'`,
+		},
+		{
+			in:   time.Date(2009, time.November, 10, 23, 45, 59, 123456789, time.UTC),
+			want: `'2009-11-10T23:45:59.123456789Z'`,
+		},
+	} {
+		require.Equal(t, test.want, PostgreSQL.EncodeTime(test.in))
+	}
+}