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.calcite.test;
  
  import org.apache.calcite.plan.RelOptPredicateList;
  import org.apache.calcite.rel.RelNode;
  import org.apache.calcite.rel.core.JoinRelType;
  import org.apache.calcite.rel.metadata.RelMetadataQuery;
  import org.apache.calcite.sql.SqlOperator;
  import org.apache.calcite.sql.fun.SqlLibraryOperators;
  import org.apache.calcite.sql.fun.SqlStdOperatorTable;
  import org.apache.calcite.tools.FrameworkConfig;
  import org.apache.calcite.tools.RelBuilder;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.CsvFileSource;
  
  import java.util.Arrays;
  
  import static org.apache.calcite.test.Matchers.sortsAs;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  /** Tests for {@link org.apache.calcite.rel.metadata.RelMdPredicates} class. */
  public class RelMdPredicatesTest {
  
    @ParameterizedTest(name = "{0}")
    @CsvFileSource(resources = "RelMdPredicatesTestPullUpFromJoin.csv", delimiter = ';')
    void testPullUpPredicatesFromJoin(JoinRelType joinType, String expectedPredicates) {
      FrameworkConfig config = RelBuilderTest.config().build();
      RelBuilder b = RelBuilder.create(config);
      RelNode rel = b
          .scan("EMP")
          .filter(b.equals(b.field("ENAME"), b.literal("Victor")))
          .scan("DEPT")
          .filter(b.equals(b.field("DNAME"), b.literal("CSD")))
          .join(
              joinType, b.equals(
              b.field(2, 0, "DEPTNO"),
              b.field(2, 1, "DEPTNO")))
          .build();
      RelMetadataQuery mq = rel.getCluster().getMetadataQuery();
      RelOptPredicateList list = mq.getPulledUpPredicates(rel);
      assertThat(list.pulledUpPredicates, sortsAs(expectedPredicates));
    }
  
    @ParameterizedTest(name = "{0}")
    @CsvFileSource(resources = "RelMdPredicatesTestLeftInferredFromJoin.csv", delimiter = ';')
    void testLeftInferredPredicatesFromJoin(JoinRelType joinType, String expectedPredicates) {
      FrameworkConfig config = RelBuilderTest.config().build();
      RelBuilder b = RelBuilder.create(config);
      RelNode rel = b
          .scan("EMP")
          .scan("DEPT")
          .filter(b.greaterThan(b.field("DEPTNO"), b.literal(10)))
          .join(
              joinType, b.equals(
              b.field(2, 0, "DEPTNO"),
              b.field(2, 1, "DEPTNO")))
          .build();
      RelMetadataQuery mq = rel.getCluster().getMetadataQuery();
      RelOptPredicateList list = mq.getPulledUpPredicates(rel);
      assertThat(list.leftInferredPredicates, sortsAs(expectedPredicates));
    }
  
    @ParameterizedTest(name = "{0}")
    @CsvFileSource(resources = "RelMdPredicatesTestRightInferredFromJoin.csv", delimiter = ';')
    void testRightInferredPredicatesFromJoin(JoinRelType joinType, String expectedPredicates) {
      FrameworkConfig config = RelBuilderTest.config().build();
      RelBuilder b = RelBuilder.create(config);
      RelNode rel = b
          .scan("EMP")
          .filter(b.greaterThan(b.field("DEPTNO"), b.literal(10)))
          .scan("DEPT")
          .join(
              joinType, b.equals(
              b.field(2, 0, "DEPTNO"),
              b.field(2, 1, "DEPTNO")))
          .build();
      RelMetadataQuery mq = rel.getCluster().getMetadataQuery();
      RelOptPredicateList list = mq.getPulledUpPredicates(rel);
      assertThat(list.rightInferredPredicates, sortsAs(expectedPredicates));
    }
  
    /** Test case for
     * <a href="https://issues.apache.org/jira/browse/CALCITE-6507">[CALCITE-6507]
     * Random functions are incorrectly considered deterministic</a>. */
    @Test void testRandomFunctionsAreNotConsideredConstant() {
      FrameworkConfig config = RelBuilderTest.config().build();
      for (SqlOperator randomOp : Arrays.asList(SqlStdOperatorTable.RAND,
          SqlLibraryOperators.RANDOM, SqlStdOperatorTable.RAND_INTEGER)) {
        RelBuilder b = RelBuilder.create(config);
        RelNode rel = b
            .scan("EMP")
            .project(b.field(0), b.call(randomOp))
            .sort(1)
            .build();
        RelMetadataQuery mq = rel.getCluster().getMetadataQuery();
        RelOptPredicateList list = mq.getPulledUpPredicates(rel);
        assertTrue(list.constantMap.isEmpty(),
            "Operator " + randomOp + " considered constant: " + list.constantMap);
      }
    }
  
  }
  