content: /*
   * Copyright 1999-2017 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.parser;
  
  import com.alibaba.druid.sql.ast.statement.SQLPrimaryKeyImpl;
  import com.alibaba.druid.sql.ast.statement.SQLTableConstraint;
  
  public class SQLDDLParser extends SQLStatementParser {
      public SQLDDLParser(String sql) {
          super(sql);
      }
  
      public SQLDDLParser(SQLExprParser exprParser) {
          super(exprParser);
      }
  
      protected SQLTableConstraint parseConstraint() {
          if (lexer.token == Token.CONSTRAINT) {
              lexer.nextToken();
          }
  
          if (lexer.token == Token.IDENTIFIER) {
              this.exprParser.name();
              throw new ParserException("TODO. " + lexer.info());
          }
  
          if (lexer.token == Token.PRIMARY) {
              lexer.nextToken();
              accept(Token.KEY);
  
              SQLPrimaryKeyImpl pk = new SQLPrimaryKeyImpl();
              accept(Token.LPAREN);
              this.exprParser.orderBy(pk.getColumns(), pk);
              accept(Token.RPAREN);
  
              return pk;
          }
  
          throw new ParserException("TODO " + lexer.info());
      }
  }
  