/*
 * Copyright 1999-2018 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.bvt.sql.oceanbase;

import com.alibaba.druid.sql.MysqlTest;
import com.alibaba.druid.sql.SQLUtils;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;

import java.util.List;

public class OceanbaseHintTest_Topk extends MysqlTest {
    public void test_0() throws Exception {
        String sql = "select /*+ topk(90 1000) */ sum(c2), c1 from t1 group by c1 order by sum(c2) limit 10 ";

        MySqlStatementParser parser = new MySqlStatementParser(sql);
        List<SQLStatement> stmtList = parser.parseStatementList();
        SQLStatement stmt = stmtList.get(0);

        String result = SQLUtils.toMySqlString(stmt);
        assertEquals("SELECT /*+ topk(90 1000) */ sum(c2), c1\n" +
                "FROM t1\n" +
                "GROUP BY c1\n" +
                "ORDER BY sum(c2)\n" +
                "LIMIT 10", result);
        print(stmtList);

        assertEquals(1, stmtList.size());

        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
        stmt.accept(visitor);

        System.out.println("Tables : " + visitor.getTables());
        System.out.println("fields : " + visitor.getColumns());
        System.out.println("coditions : " + visitor.getConditions());
        System.out.println("orderBy : " + visitor.getOrderByColumns());

        assertEquals(1, visitor.getTables().size());
        assertEquals(2, visitor.getColumns().size());
        assertEquals(0, visitor.getConditions().size());

//        assertTrue(visitor.getTables().containsKey(new TableStat.Name("t_basic_store")));
    }
}
