Examples of org.eigenbase.relopt.hep.HepProgram

org.eigenbase.relopt.hep.HepProgram
HepProgram specifies the order in which rules should be attempted by {@link HepPlanner}. Use {@link HepProgramBuilder} to create a new instance ofHepProgram.
Note that the structure of a program is immutable, but the planner uses it as read/write during planning, so a program can only be in use by a single planner at a time.

        + "(select ename, trim(job), sal * 2, deptno from emp) e, dept d "
        + "where e.deptno = d.deptno");
  }


  @Test public void testReduceValuesUnderFilter() throws Exception {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(PushFilterPastProjectRule.INSTANCE)
        .addRuleInstance(ReduceValuesRule.FILTER_INSTANCE)
        .build();


    // Plan should be same as for

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    checkPlanning(program,
        "select a, b from (values (10, 'x'), (20, 'y')) as t(a, b) where a < 15");
  }


  @Test public void testReduceValuesUnderProject() throws Exception {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(MergeProjectRule.INSTANCE)
        .addRuleInstance(ReduceValuesRule.PROJECT_INSTANCE)
        .build();


    // Plan should be same as for

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    checkPlanning(program,
        "select a + b from (values (10, 1), (20, 3)) as t(a, b)");
  }


  @Test public void testReduceValuesUnderProjectFilter() throws Exception {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(PushFilterPastProjectRule.INSTANCE)
        .addRuleInstance(MergeProjectRule.INSTANCE)
        .addRuleInstance(ReduceValuesRule.PROJECT_FILTER_INSTANCE)
        .build();

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  @Ignore // Optiq does not support INSERT yet
  @Test public void testReduceValuesNull() throws Exception {
    // The NULL literal presents pitfalls for value-reduction. Only
    // an INSERT statement contains un-CASTed NULL values.
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(ReduceValuesRule.PROJECT_INSTANCE)
        .build();
    checkPlanning(program,
        "insert into sales.depts(deptno,name) values (NULL, 'null')");
  }

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    checkPlanning(program,
        "insert into sales.depts(deptno,name) values (NULL, 'null')");
  }


  @Test public void testReduceValuesToEmpty() throws Exception {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(PushFilterPastProjectRule.INSTANCE)
        .addRuleInstance(MergeProjectRule.INSTANCE)
        .addRuleInstance(ReduceValuesRule.PROJECT_FILTER_INSTANCE)
        .build();

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        "select a + b as x, b, a from (values (10, 1), (30, 7)) as t(a, b)"
        + " where a - b < 0");
  }


  @Test public void testEmptyFilterProjectUnion() throws Exception {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(PushFilterPastSetOpRule.INSTANCE)
        .addRuleInstance(PushFilterPastProjectRule.INSTANCE)
        .addRuleInstance(MergeProjectRule.INSTANCE)
        .addRuleInstance(ReduceValuesRule.PROJECT_FILTER_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.PROJECT_INSTANCE)

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        + ")\n"
        + "where x + y > 30");
  }


  @Test public void testEmptyJoin() {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(ReduceExpressionsRule.FILTER_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.PROJECT_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.JOIN_LEFT_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.JOIN_RIGHT_INSTANCE)
        .build();

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        + "select * from emp where false)\n"
        + "join dept using (deptno)");
  }


  @Test public void testEmptyJoinLeft() {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(ReduceExpressionsRule.FILTER_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.PROJECT_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.JOIN_LEFT_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.JOIN_RIGHT_INSTANCE)
        .build();

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        + "select * from emp where false)\n"
        + "left join dept using (deptno)");
  }


  @Test public void testEmptyJoinRight() {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(ReduceExpressionsRule.FILTER_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.PROJECT_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.JOIN_LEFT_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.JOIN_RIGHT_INSTANCE)
        .build();

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        + "select * from emp where false)\n"
        + "right join dept using (deptno)");
  }


  @Test public void testEmptySort() {
    HepProgram program = new HepProgramBuilder()
        .addRuleInstance(ReduceExpressionsRule.FILTER_INSTANCE)
        .addRuleInstance(RemoveEmptyRules.SORT_INSTANCE)
        .build();


    checkPlanning(program,

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Related Classes of org.eigenbase.relopt.hep.HepProgram

org.apache.hadoop.hive.ql.parse.SemanticAnalyzer$OptiqBasedPlanner

org.eigenbase.relopt.RelOptMaterialization

org.eigenbase.test.RelOptRulesTest

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