/*
 * 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.facebook.presto.tests;

import com.facebook.presto.tests.tpch.TpchQueryRunner;
import com.google.common.base.Strings;
import org.intellij.lang.annotations.Language;
import org.testng.annotations.Test;

import static org.testng.Assert.assertTrue;

public class TestTpchDistributedQueries
        extends AbstractTestQueries
{
    public TestTpchDistributedQueries()
            throws Exception
    {
        super(TpchQueryRunner::createQueryRunner);
    }

    @Test
    public void testTooLongQuery()
    {
        //  Generate a super-long query: SELECT x,x,x,x,x,... FROM (VALUES 1,2,3,4,5) t(x)
        @Language("SQL") String longQuery = "SELECT x" + Strings.repeat(",x", 500_000) + " FROM (VALUES 1,2,3,4,5) t(x)";
        assertQueryFails(longQuery, "Query text length \\(1000037\\) exceeds the maximum length \\(1000000\\)");
    }

    @Test
    public void testTableSampleSystem()
    {
        int total = computeActual("SELECT orderkey FROM orders").getMaterializedRows().size();

        boolean sampleSizeFound = false;
        for (int i = 0; i < 100; i++) {
            int sampleSize = computeActual("SELECT orderkey FROM ORDERS TABLESAMPLE SYSTEM (50)").getMaterializedRows().size();
            if (sampleSize > 0 && sampleSize < total) {
                sampleSizeFound = true;
                break;
            }
        }
        assertTrue(sampleSizeFound, "Table sample returned unexpected number of rows");
    }
}