refactor

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -967,7 +967,7 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter {
     @Override
     public boolean visit(SQLTruncateStatement x) {
         print("TRUNCATE TABLE ");
-        printAndAccept(x.getTableNames(), ", ");
+        printAndAccept(x.getTableSources(), ", ");
         return false;
     }
 

src/main/java/com/alibaba/druid/sql/visitor/SchemaStatVisitor.java

@@ -377,7 +377,9 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
 
         String originalTable = getCurrentTable();
 
-        for (SQLName name : x.getTableNames()) {
+        for (SQLExprTableSource tableSource : x.getTableSources()) {
+            SQLName name = (SQLName) tableSource.getExpr();
+            
             String ident = name.toString();
             setCurrentTable(ident);
             x.putAttribute("_old_local_", originalTable);