/*
 * 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.oracle;

import org.junit.Assert;
import junit.framework.TestCase;

import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
import com.alibaba.druid.sql.test.TestUtils;

public class OracleSubqueryFactoringTest2 extends TestCase {
    public void test_interval() throws Exception {
        String sql = "WITH org_chart (eid, emp_last, mgr_id, reportLevel, salary, job_id) AS\n"
                + "(\n"
                + "SELECT employee_id, last_name, manager_id, 0 reportLevel, salary, job_id\n"
                + "FROM employees\n"
                + "WHERE manager_id is null\n"
                + "UNION ALL\n"
                + "SELECT e.employee_id, e.last_name, e.manager_id, r.reportLevel+1 reportLevel, e.salary, e.job_id\n"
                + "FROM org_chart r, employees e\n" + "WHERE r.eid = e.manager_id\n" + ")\n"
                + "SEARCH DEPTH FIRST BY emp_last SET order1\n"
                + "CYCLE hire_date SET is_cycle TO 'Y' DEFAULT 'N'"
                + "SELECT lpad(' ',2*reportLevel)||emp_last emp_name, eid, mgr_id, salary, job_id\n"
                + "FROM org_chart\n" + "ORDER BY order1;\n";

        String expected = "WITH org_chart (eid, emp_last, mgr_id, reportLevel, salary, job_id) AS (\n" +
                "\t\tSELECT employee_id, last_name, manager_id, 0 AS reportLevel, salary\n" +
                "\t\t\t, job_id\n" +
                "\t\tFROM employees\n" +
                "\t\tWHERE manager_id IS NULL\n" +
                "\t\tUNION ALL\n" +
                "\t\tSELECT e.employee_id, e.last_name, e.manager_id, r.reportLevel + 1 AS reportLevel\n" +
                "\t\t\t, e.salary, e.job_id\n" +
                "\t\tFROM org_chart r, employees e\n" +
                "\t\tWHERE r.eid = e.manager_id\n" +
                "\t)\n" +
                "\tSEARCH DEPTH FIRST BY emp_last SET order1\n" +
                "\tCYCLE hire_date SET is_cycle TO 'Y' DEFAULT 'N'\n" +
                "SELECT lpad(' ', 2 * reportLevel) || emp_last AS emp_name\n" +
                "\t, eid, mgr_id, salary, job_id\n" +
                "FROM org_chart\n" +
                "ORDER BY order1;";

        OracleStatementParser parser = new OracleStatementParser(sql);
        SQLSelectStatement stmt = (SQLSelectStatement) parser.parseStatementList().get(0);

        String text = TestUtils.outputOracle(stmt);

        assertEquals(expected, text);
    }

}
