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.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.TestPipeline;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.RelNode;
  import org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.metadata.RelMetadataQuery;
  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 BeamIOSourceRel}. */
  public class BeamIOSourceRelTest 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_DETAILS_BOUNDED",
          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_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(2d)));
    }
  
    @Test
    public void boundedRowCount() {
      String sql = "SELECT * FROM ORDER_DETAILS_BOUNDED";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamIOSourceRel)) {
        root = root.getInput(0);
      }
  
      Assert.assertEquals(5d, root.estimateRowCount(RelMetadataQuery.instance()), 0.001);
    }
  
    @Test
    public void unboundedRowCount() {
      String sql = "SELECT * FROM ORDER_DETAILS_UNBOUNDED";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamIOSourceRel)) {
        root = root.getInput(0);
      }
  
      Assert.assertEquals(2d, root.estimateRowCount(RelMetadataQuery.instance()), 0.001);
    }
  
    @Test
    public void testBoundedNodeStats() {
      String sql = "SELECT * FROM ORDER_DETAILS_BOUNDED";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamIOSourceRel)) {
        root = root.getInput(0);
      }
  
      NodeStats estimate =
          BeamSqlRelUtils.getNodeStats(
              root, ((BeamRelMetadataQuery) root.getCluster().getMetadataQuery()));
  
      Assert.assertEquals(5d, estimate.getRowCount(), 0.01);
      Assert.assertEquals(0d, estimate.getRate(), 0.01);
      Assert.assertEquals(5d, estimate.getWindow(), 0.01);
    }
  
    @Test
    public void testUnboundedNodeStats() {
      String sql = "SELECT * FROM ORDER_DETAILS_UNBOUNDED";
  
      RelNode root = env.parseQuery(sql);
  
      while (!(root instanceof BeamIOSourceRel)) {
        root = root.getInput(0);
      }
  
      NodeStats estimate =
          BeamSqlRelUtils.getNodeStats(
              root, ((BeamRelMetadataQuery) root.getCluster().getMetadataQuery()));
  
      Assert.assertEquals(0d, estimate.getRowCount(), 0.01);
      Assert.assertEquals(2d, estimate.getRate(), 0.01);
      Assert.assertEquals(BeamIOSourceRel.CONSTANT_WINDOW_SIZE, estimate.getWindow(), 0.01);
    }
  }
  