diff --git a/core/src/main/java/com/qihoo/qsql/plan/TableNameCollector.java b/core/src/main/java/com/qihoo/qsql/plan/TableNameCollector.java
index 2198532..d8451fa 100644
--- a/core/src/main/java/com/qihoo/qsql/plan/TableNameCollector.java
+++ b/core/src/main/java/com/qihoo/qsql/plan/TableNameCollector.java
@@ -190,7 +190,7 @@ private void visitBasicCall(SqlBasicCall sqlCall) {
 
     private QueryTables validateTableName(QueryTables tableNames) {
         for (String tableName : tableNames.tableNames) {
-            if (tableName.split("\\.", -1).length > 3) {
+            if (tableName.split("\\.", -1).length > 2) {
                 throw new ParseException("Qsql only support structure like dbName.tableName,"
                     + " and there is a unsupported tableName here: " + tableName);
             }