fix sql server error: main_test.go dtmsvr.PopulateDB(false) invokes GetPlaceHoldSQL(sql)

client/dtmcli/dtmimp/db_special.go

@@ -78,27 +78,6 @@ func init() {
 	dbSpecials[DBTypePostgres] = &postgresDBSpecial{}
 }
 
-// TODO sqlserver implement (for go client only, not for dtm server)
-type sqlserverDBSpecial struct{}
-
-func (*sqlserverDBSpecial) GetPlaceHoldSQL(sql string) string {
-	// TODO sqlserver implement
-	return sql
-}
-
-func (*sqlserverDBSpecial) GetInsertIgnoreTemplate(tableAndValues string, pgConstraint string) string {
-	// TODO sqlserver implement
-	return ""
-}
-
-func (*sqlserverDBSpecial) GetXaSQL(command string, xid string) string {
-	// TODO sqlserver implement
-	return ""
-}
-func init() {
-	dbSpecials[DBTypeSQLServer] = &sqlserverDBSpecial{}
-}
-
 // GetDBSpecial get DBSpecial for currentDBType
 func GetDBSpecial(dbType string) DBSpecial {
 	if dbType == "" {

client/dtmcli/dtmimp/utils.go

@@ -207,7 +207,9 @@ func DBExec(dbType string, db DB, sql string, values ...interface{}) (affected i
 		return 0, nil
 	}
 	began := time.Now()
-	sql = GetDBSpecial(dbType).GetPlaceHoldSQL(sql)
+	if len(values) > 0 {
+		sql = GetDBSpecial(dbType).GetPlaceHoldSQL(sql)
+	}
 	r, rerr := db.Exec(sql, values...)
 	used := time.Since(began) / time.Millisecond
 	if rerr == nil {