improved sql parser.

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -659,7 +659,7 @@ public class SQLExprParser extends SQLParser {
                 break;
             }
             default:
-                throw new ParserException("ERROR" + lexer.info());
+                throw new ParserException("ERROR. " + lexer.info());
         }
 
         SQLExpr expr = primaryRest(sqlExpr);
@@ -882,6 +882,12 @@ public class SQLExprParser extends SQLParser {
                 methodInvokeExpr.setFrom(from);
             }
 
+            if (lexer.token == Token.USING) {
+                lexer.nextToken();
+                SQLExpr using = this.primary();
+                methodInvokeExpr.setUsing(using);
+            }
+
             accept(Token.RPAREN);
 
             if (lexer.token() == Token.OVER) {