content: /*
   * 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 org.apache.beam.sdk.extensions.sql;
  
  import org.apache.beam.sdk.extensions.sql.impl.rel.BaseRelTest;
  import org.apache.beam.sdk.extensions.sql.meta.provider.test.TestBoundedTable;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.testing.PAssert;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.Row;
  import org.junit.BeforeClass;
  import org.junit.Rule;
  import org.junit.Test;
  
  /** Tests for comparison operator in queries. */
  public class BeamSqlDslExistsTest extends BaseRelTest {
    @Rule public final TestPipeline pipeline = TestPipeline.create();
  
    @BeforeClass
    public static void prepare() {
      registerTable(
          "CUSTOMER",
          TestBoundedTable.of(
                  Schema.FieldType.INT32, "c_custkey",
                  Schema.FieldType.DOUBLE, "c_acctbal",
                  Schema.FieldType.STRING, "c_city")
              .addRows(1, 1.0, "Seattle", 5, 1.0, "Mountain View", 4, 4.0, "Portland"));
  
      registerTable(
          "ORDERS",
          TestBoundedTable.of(
                  Schema.FieldType.INT32, "o_orderkey",
                  Schema.FieldType.INT32, "o_custkey",
                  Schema.FieldType.DOUBLE, "o_totalprice")
              .addRows(1, 1, 1.0, 2, 2, 2.0, 3, 3, 3.0));
    }
  
    @Test
    public void testExistsSubquery() {
      String sql =
          "select * from CUSTOMER "
              + " where exists ( "
              + " select * from ORDERS "
              + " where o_custkey = c_custkey )";
  
      PCollection<Row> rows = compilePipeline(sql, pipeline);
      PAssert.that(rows)
          .containsInAnyOrder(
              TestUtils.RowsBuilder.of(
                      Schema.FieldType.INT32, "c_custkey",
                      Schema.FieldType.DOUBLE, "c_acctbal",
                      Schema.FieldType.STRING, "c_city")
                  .addRows(1, 1.0, "Seattle")
                  .getRows());
  
      pipeline.run().waitUntilFinish();
    }
  
    @Test
    public void testNotExistsSubquery() {
      String sql =
          "select * from CUSTOMER "
              + " where not exists ( "
              + " select * from ORDERS "
              + " where o_custkey = c_custkey )";
  
      PCollection<Row> rows = compilePipeline(sql, pipeline);
      PAssert.that(rows)
          .containsInAnyOrder(
              TestUtils.RowsBuilder.of(
                      Schema.FieldType.INT32, "c_custkey",
                      Schema.FieldType.DOUBLE, "c_acctbal",
                      Schema.FieldType.STRING, "c_city")
                  .addRows(4, 4.0, "Portland", 5, 1.0, "Mountain View")
                  .getRows());
  
      pipeline.run().waitUntilFinish();
    }
  }
  