/*
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.dlink.parser;

/**
 * SelectSqlParser
 *
 * @author wenmo
 * @since 2021/6/14 16:53
 */
public class SelectSqlParser extends BaseSingleSqlParser {

    public SelectSqlParser(String originalSql) {
        super(originalSql);
    }

    @Override
    protected void initializeSegments() {
        segments.add(new SqlSegment("(select)(.+)(from)", "[,]"));
        segments.add(new SqlSegment("(from)(.+?)(where |group\\s+by|having|order\\s+by | ENDOFSQL)", "(,|s+lefts+joins+|s+rights+joins+|s+inners+joins+)"));
        segments.add(new SqlSegment("(where)(.+?)(group\\s+by |having| order\\s+by | ENDOFSQL)", "(and|or)"));
        segments.add(new SqlSegment("(group\\s+by)(.+?)(having|order\\s+by| ENDOFSQL)", "[,]"));
        segments.add(new SqlSegment("(having)(.+?)(order\\s+by| ENDOFSQL)", "(and|or)"));
        segments.add(new SqlSegment("(order\\s+by)(.+)( ENDOFSQL)", "[,]"));
    }
}

