/*
 * 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.mysql.visitor;

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 com.alibaba.druid.stat.TableStat.Column;
import junit.framework.TestCase;

import java.util.List;

public class MySqlSchemaStatVisitorTest_Subquery extends TestCase {
    public void test_0() throws Exception {
        String sql = "SELECT id2, name2 FROM (select id, name from users u where id = 22 limit 10) a";

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

        assertEquals(1, statementList.size());

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

        System.out.println(sql);
        System.out.println("Tables : " + visitor.getTables());
        System.out.println("fields : " + visitor.getColumns());
        System.out.println("conditions : " + visitor.getConditions());

        assertEquals(1, visitor.getTables().size());
        assertEquals(true, visitor.containsTable("users"));
        assertEquals(22, visitor.getConditions().get(0).getValues().get(0));

        assertEquals(4, visitor.getColumns().size());
        assertEquals(true, visitor.getColumns().contains(new Column("users", "id")));
        assertEquals(true, visitor.getColumns().contains(new Column("users", "name")));
    }
}
