improved sql parser.

src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/expr/MySqlOutFileExpr.java

@@ -25,7 +25,7 @@ public class MySqlOutFileExpr extends MySqlObjectImpl implements SQLExpr {
     private SQLExpr        file;
     private String         charset;
 
-    private SQLLiteralExpr columnsTerminatedBy;
+    private SQLExpr        columnsTerminatedBy;
     private boolean        columnsEnclosedOptionally = false;
     private SQLLiteralExpr columnsEnclosedBy;
     private SQLLiteralExpr columnsEscaped;
@@ -66,11 +66,11 @@ public class MySqlOutFileExpr extends MySqlObjectImpl implements SQLExpr {
         this.charset = charset;
     }
 
-    public SQLLiteralExpr getColumnsTerminatedBy() {
+    public SQLExpr getColumnsTerminatedBy() {
         return columnsTerminatedBy;
     }
 
-    public void setColumnsTerminatedBy(SQLLiteralExpr columnsTerminatedBy) {
+    public void setColumnsTerminatedBy(SQLExpr columnsTerminatedBy) {
         this.columnsTerminatedBy = columnsTerminatedBy;
     }
 

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlSelectParser.java

@@ -328,7 +328,7 @@ public class MySqlSelectParser extends SQLSelectParser {
                         lexer.nextToken();
                         accept(Token.BY);
                     }
-                    outFile.setColumnsTerminatedBy((SQLLiteralExpr) expr());
+                    outFile.setColumnsTerminatedBy(expr());
 
                     if (identifierEquals("OPTIONALLY")) {
                         lexer.nextToken();

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlSchemaStatVisitor.java

@@ -250,6 +250,9 @@ public class MySqlSchemaStatVisitor extends SchemaStatVisitor implements MySqlAS
 
     @Override
     public boolean visit(MySqlKey x) {
+        for (SQLObject item : x.getColumns()) {
+            item.accept(this);
+        }
         return false;
     }
 

src/main/java/com/alibaba/druid/sql/dialect/odps/ast/OdpsValuesTableSource.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.druid.sql.dialect.odps.ast;
 
 import com.alibaba.druid.sql.ast.SQLName;

src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java

@@ -236,7 +236,6 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
         print0(ucase ? "DELETE " : "delete ");
 
         SQLTableSource tableSource = x.getTableSource();
-
         if (x.getHints().size() > 0) {
             printAndAccept(x.getHints(), ", ");
             print(' ');