date and timezone issue

v2/connection.go

@@ -15,6 +15,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 )
 
 type ConnectionState int
@@ -86,7 +87,8 @@ type Connection struct {
 		date      int
 		timestamp int
 	}
-	bad bool
+	bad       bool
+	dbTimeLoc *time.Location
 }
 
 type OracleConnector struct {
@@ -535,9 +537,19 @@ func (conn *Connection) OpenWithContext(ctx context.Context) error {
 			return err
 		}
 	}
+	conn.getDBTimeZone()
 	return nil
 }
 
+func (conn *Connection) getDBTimeZone() {
+	var current time.Time
+	err := conn.QueryRowContext(context.Background(), "SELECT SYSTIMESTAMP FROM DUAL", nil).Scan(&current)
+	if err != nil {
+		conn.dbTimeLoc = time.UTC
+	}
+	conn.dbTimeLoc = current.Location()
+}
+
 // Begin a transaction
 func (conn *Connection) Begin() (driver.Tx, error) {
 	conn.connOption.Tracer.Print("Begin transaction")

v2/parameter.go

@@ -197,13 +197,13 @@ func (par *ParameterInfo) load(conn *Connection) error {
 	case ROWID:
 		par.MaxLen = 128
 	case DATE:
-		par.MaxLen = 7
+		par.MaxLen = converters.MAX_LEN_DATE
 	case IBFloat:
 		par.MaxLen = 4
 	case IBDouble:
 		par.MaxLen = 8
 	case TimeStampTZ_DTY:
-		par.MaxLen = 13
+		par.MaxLen = converters.MAX_LEN_TIMESTAMP
 	case IntervalYM_DTY:
 		fallthrough
 	case IntervalDS_DTY:
@@ -996,10 +996,16 @@ func (par *ParameterInfo) decodePrimValue(conn *Connection, udt bool) error {
 	case TimeStampDTY, TimeStampeLTZ, TimeStampLTZ_DTY, TIMESTAMPTZ, TimeStampTZ_DTY:
 		fallthrough
 	case TIMESTAMP, DATE:
-		par.oPrimValue, err = converters.DecodeDate(par.BValue)
+		tempTime, err := converters.DecodeDate(par.BValue)
 		if err != nil {
 			return err
 		}
+		if par.DataType == DATE && conn.dbTimeLoc != time.UTC {
+			par.oPrimValue = time.Date(tempTime.Year(), tempTime.Month(), tempTime.Day(),
+				tempTime.Hour(), tempTime.Minute(), tempTime.Second(), tempTime.Nanosecond(), conn.dbTimeLoc)
+		} else {
+			par.oPrimValue = tempTime
+		}
 	case OCIClobLocator, OCIBlobLocator:
 		var locator []byte
 		if !udt {