[jira] [Created] (CALCITE-4783) Dropped the predicate condition after RelFieldTrimmer trim the RelNode

["xzh_dz (Jira)" <ji...@apache.org>]

xzh_dz created CALCITE-4783:
-------------------------------

             Summary: Dropped the predicate condition after RelFieldTrimmer trim the RelNode
                 Key: CALCITE-4783
                 URL: https://issues.apache.org/jira/browse/CALCITE-4783
             Project: Calcite
          Issue Type: Improvement
            Reporter: xzh_dz


{code:java}
// code placeholder
org.apache.calcite.test.SqlToRelConverterTest
@Test void testTrim() {
  final String sql = "select count(*) from emp where ename = '1'";
  final RelNode rel = tester.convertSqlToRel(sql).rel;
  final HepProgramBuilder programBuilder = HepProgram.builder();
  programBuilder.addRuleInstance(CoreRules.FILTER_TO_CALC);
  final HepPlanner planner = new HepPlanner(programBuilder.build());
  planner.setRoot(rel);
  final RelNode calc = planner.findBestExp();
  final List<RelOptTable> relOptTables = RelOptUtil.findAllTables(calc);
  RelOptSchema relOptSchema = null;
  if (relOptTables.size() != 0) {
    relOptSchema = relOptTables.get(0).getRelOptSchema();
  }
  final RelBuilder relBuilder = RelFactories.LOGICAL_BUILDER.create(
      calc.getCluster(), relOptSchema);
  final RelFieldTrimmer fieldTrimmer = new RelFieldTrimmer(null, relBuilder);
  final RelNode trimmed = fieldTrimmer.trim(calc);
  System.out.println(RelOptUtil.toString(trimmed));
}
result:
LogicalAggregate(group=[{}], EXPR$0=[COUNT()])
  LogicalTableScan(table=[[CATALOG, SALES, EMP]]){code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)