fix oracle date field insert (#2420)

for #2419

Reviewed-on: https://gitea.com/xorm/xorm/pulls/2420
Co-authored-by: Kos <kos@noreply.gitea.com>
Co-committed-by: Kos <kos@noreply.gitea.com>

internal/statements/args.go

@@ -5,10 +5,23 @@
 package statements
 
 import (
+	"database/sql/driver"
+	"fmt"
+
 	"xorm.io/builder"
 	"xorm.io/xorm/schemas"
 )
 
+type DateTimeString struct {
+	Layout string
+	Str    string
+}
+
+// Value implements the driver Valuer interface.
+func (n DateTimeString) Value() (driver.Value, error) {
+	return n.Str, nil
+}
+
 // WriteArg writes an arg
 func (statement *Statement) WriteArg(w *builder.BytesWriter, arg interface{}) error {
 	switch argv := arg.(type) {
@@ -22,6 +35,17 @@ func (statement *Statement) WriteArg(w *builder.BytesWriter, arg interface{}) er
 		if _, err := w.WriteString(")"); err != nil {
 			return err
 		}
+	case *DateTimeString:
+		if statement.dialect.URI().DBType == schemas.ORACLE {
+			if _, err := fmt.Fprintf(w, `TO_DATE(?,'%s')`, argv.Layout); err != nil {
+				return err
+			}
+		} else {
+			if err := w.WriteByte('?'); err != nil {
+				return err
+			}
+		}
+		w.Append(arg)
 	default:
 		if err := w.WriteByte('?'); err != nil {
 			return err

internal/statements/values.go

@@ -88,7 +88,20 @@ func (statement *Statement) Value2Interface(col *schemas.Column, fieldValue refl
 		if fieldType.ConvertibleTo(schemas.TimeType) {
 			t := fieldValue.Convert(schemas.TimeType).Interface().(time.Time)
 			tf, err := dialects.FormatColumnTime(statement.dialect, statement.defaultTimeZone, col, t)
+			if val, ok := tf.(string); ok {
+				var layout string
+				switch col.SQLType.Name {
+				case schemas.Date:
+					layout = "yyyy-MM-dd"
+				case schemas.Time:
+					layout = "HH24:mi:ss"
+				default:
+					layout = "yyyy-MM-dd HH24:mi:ss"
+				}
+				return &DateTimeString{Layout: layout, Str: val}, err
+			} else {
 				return tf, err
+			}
 		} else if fieldType.ConvertibleTo(nullFloatType) {
 			t := fieldValue.Convert(nullFloatType).Interface().(sql.NullFloat64)
 			if !t.Valid {