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.BeamTableStatistics;
  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.extensions.sql.meta.provider.test.TestUnboundedTable;
  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.joda.time.DateTime;
  import org.joda.time.Duration;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Rule;
  import org.junit.Test;
  
  /** Test for {@code BeamMinusRel}. */
  public class BeamMinusRelTest extends BaseRelTest {
    @Rule public final TestPipeline pipeline = TestPipeline.create();
  
    private static final DateTime FIRST_DATE = new DateTime(1);
    private static final DateTime SECOND_DATE = new DateTime(1 + 3600 * 1000);
  
    private static final Duration WINDOW_SIZE = Duration.standardHours(1);
  
    @BeforeClass
    public static void prepare() {
      registerTable(
          "ORDER_DETAILS1",
          TestBoundedTable.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),
                  4L,
                  4,
                  new BigDecimal(4.0),
                  4L,
                  4,
                  new BigDecimal(4.0)));
  
      registerTable(
          "ORDER_DETAILS2",
          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),
                  3L,
                  3,
                  new BigDecimal(3.0)));
  
      registerTable(
          "ORDER_DETAILS_UNBOUNDED",
          TestUnboundedTable.of(
                  Schema.FieldType.INT32, "order_id",
                  Schema.FieldType.INT32, "site_id",
                  Schema.FieldType.INT32, "price",
                  Schema.FieldType.DATETIME, "order_time")
              .timestampColumnIndex(3)
              .addRows(Duration.ZERO, 1, 1, 1, FIRST_DATE, 1, 2, 6, FIRST_DATE)
              .addRows(
                  WINDOW_SIZE.plus(Duration.standardMinutes(1)),
                  2,
                  2,
                  7,
                  SECOND_DATE,
                  2,
                  3,
                  8,
                  SECOND_DATE,
                  // this late record is omitted(First window)
                  1,
                  3,
                  3,
                  FIRST_DATE)
              .addRows(
                  // this late record is omitted(Second window)
                  WINDOW_SIZE.plus(WINDOW_SIZE).plus(Duration.standardMinutes(1)),
                  2,
                  3,
                  3,
                  SECOND_DATE)
              .setStatistics(BeamTableStatistics.createUnboundedTableStatistics(4d)));
    }
  
    @Test
    public void testExcept() {
      String sql = "";
      sql +=
          "SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS1 "
              + " EXCEPT "
              + "SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS2 ";
  
      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(4L, 4, new BigDecimal(4.0))
                  .getRows());
  
      pipeline.run();
    }
  
    @Test
    public void testExceptAll() {
      String sql = "";
      sql +=
          "SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS1 "
              + " EXCEPT ALL "
              + "SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS2 ";
  
      PCollection<Row> rows = compilePipeline(sql, pipeline);
      PAssert.that(rows).satisfies(new CheckSize(3));
  
      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),
                      4L,
                      4,
                      new BigDecimal(4.0),
                      4L,
                      4,
                      new BigDecimal(4.0))
                  .getRows());
  
      pipeline.run();
    }
  
    @Test
    public void testExceptRemovesDuplicates() {
      String sql = "(SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 1) EXCEPT SELECT 1";
  
      PCollection<Row> rows = compilePipeline(sql, pipeline);
      PAssert.that(rows).satisfies(new CheckSize(1));
  
      PAssert.that(rows)
          .containsInAnyOrder(
              TestUtils.RowsBuilder.of(Schema.FieldType.INT32, "i").addRows(2).getRows());
  
      pipeline.run();
    }
  
    @Test
    public void testNodeStatsEstimation() {
      String sql =
          "SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS1 "
              + " EXCEPT ALL "
              + "SELECT order_id, site_id, price "
              + "FROM ORDER_DETAILS2 ";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamMinusRel)) {
        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(5. - 3. / 2., estimate.getRowCount(), 0.01);
      Assert.assertEquals(5. - 3. / 2., estimate.getWindow(), 0.01);
    }
  
    @Test
    public void testNodeStatsEstimationUnbounded() {
      String sql =
          "SELECT * "
              + "FROM "
              + "(select order_id FROM ORDER_DETAILS_UNBOUNDED "
              + "          GROUP BY order_id, TUMBLE(order_time, INTERVAL '1' HOUR)) o1 "
              + " EXCEPT ALL "
              + " select order_id FROM ORDER_DETAILS_UNBOUNDED "
              + "          GROUP BY order_id, TUMBLE(order_time, INTERVAL '1' HOUR) ";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamMinusRel)) {
        root = root.getInput(0);
      }
  
      NodeStats estimate =
          BeamSqlRelUtils.getNodeStats(
              root, ((BeamRelMetadataQuery) root.getCluster().getMetadataQuery()));
  
      // note that we have group by
      Assert.assertEquals(4d / 2 - 4d / 4, estimate.getRate(), 0.01);
      Assert.assertEquals(0d, estimate.getRowCount(), 0.01);
    }
  }
  