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.impl.rel;
  
  import java.math.BigDecimal;
  import org.apache.beam.sdk.extensions.sql.TestUtils;
  import org.apache.beam.sdk.extensions.sql.impl.planner.BeamRelMetadataQuery;
  import org.apache.beam.sdk.extensions.sql.impl.planner.NodeStats;
  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.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.RelNode;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Rule;
  import org.junit.Test;
  
  /** Test for {@code BeamUnionRel}. */
  public class BeamUnionRelTest extends BaseRelTest {
    @Rule public final TestPipeline pipeline = TestPipeline.create();
  
    @BeforeClass
    public static void prepare() {
      registerTable(
          "ORDER_DETAILS",
          TestBoundedTable.of(
                  Schema.FieldType.INT64, "order_id",
                  Schema.FieldType.INT32, "site_id",
                  Schema.FieldType.DECIMAL, "price")
              .addRows(1L, 1, new BigDecimal(1.0), 2L, 2, new BigDecimal(2.0)));
    }
  
    @Test
    public void testUnion() throws Exception {
      String sql =
          "SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS "
              + " UNION SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS ";
  
      PCollection<Row> rows = compilePipeline(sql, pipeline);
      PAssert.that(rows)
          .containsInAnyOrder(
              TestUtils.RowsBuilder.of(
                      Schema.FieldType.INT64, "order_id",
                      Schema.FieldType.INT32, "site_id",
                      Schema.FieldType.DECIMAL, "price")
                  .addRows(1L, 1, new BigDecimal(1.0), 2L, 2, new BigDecimal(2.0))
                  .getRows());
      pipeline.run();
    }
  
    @Test
    public void testUnionAll() throws Exception {
      String sql =
          "SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS"
              + " UNION ALL "
              + " SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS";
  
      PCollection<Row> rows = compilePipeline(sql, pipeline);
      PAssert.that(rows)
          .containsInAnyOrder(
              TestUtils.RowsBuilder.of(
                      Schema.FieldType.INT64, "order_id",
                      Schema.FieldType.INT32, "site_id",
                      Schema.FieldType.DECIMAL, "price")
                  .addRows(
                      1L,
                      1,
                      new BigDecimal(1.0),
                      1L,
                      1,
                      new BigDecimal(1.0),
                      2L,
                      2,
                      new BigDecimal(2.0),
                      2L,
                      2,
                      new BigDecimal(2.0))
                  .getRows());
      pipeline.run();
    }
  
    @Test
    public void testNodeStatsEstimation() {
      String sql =
          "SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS "
              + " UNION SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS ";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamUnionRel)) {
        root = root.getInput(0);
      }
  
      NodeStats estimate =
          BeamSqlRelUtils.getNodeStats(
              root, ((BeamRelMetadataQuery) root.getCluster().getMetadataQuery()));
  
      Assert.assertFalse(estimate.isUnknown());
      Assert.assertEquals(0d, estimate.getRate(), 0.01);
  
      Assert.assertEquals(2., estimate.getRowCount(), 0.01);
      Assert.assertEquals(2., estimate.getWindow(), 0.01);
    }
  
    @Test
    public void testNodeStatsEstimationUnionAll() {
      String sql =
          "SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS "
              + " UNION ALL SELECT "
              + " order_id, site_id, price "
              + "FROM ORDER_DETAILS ";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamUnionRel)) {
        root = root.getInput(0);
      }
  
      NodeStats estimate =
          BeamSqlRelUtils.getNodeStats(
              root, ((BeamRelMetadataQuery) root.getCluster().getMetadataQuery()));
  
      Assert.assertFalse(estimate.isUnknown());
      Assert.assertEquals(0d, estimate.getRate(), 0.01);
  
      Assert.assertEquals(4., estimate.getRowCount(), 0.01);
      Assert.assertEquals(4., estimate.getWindow(), 0.01);
    }
  }
  