How to use

CachingRelMetadataProvider

in

org.apache.calcite.rel.metadata

optCluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));

optCluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));

RelMetadataProvider chainedProvider = ChainedRelMetadataProvider.of(list);
basePlan.getCluster().setMetadataProvider(
  new CachingRelMetadataProvider(chainedProvider, planner));

RelMetadataProvider chainedProvider = ChainedRelMetadataProvider.of(list);
basePlan.getCluster().setMetadataProvider(
  new CachingRelMetadataProvider(chainedProvider, planner));

new CachingRelMetadataProvider(chainedProvider, planner));

public RelNode transform(int ruleSetIndex, RelTraitSet requiredOutputTraits,
  RelNode rel) throws RelConversionException {
 ensure(State.STATE_5_CONVERTED);
 rel.getCluster().setMetadataProvider(
   new CachingRelMetadataProvider(
     rel.getCluster().getMetadataProvider(),
     rel.getCluster().getPlanner()));
 Program program = programs.get(ruleSetIndex);
 return program.run(planner, rel, requiredOutputTraits, ImmutableList.of(),
   ImmutableList.of());
}

public RelNode transform(int ruleSetIndex, RelTraitSet requiredOutputTraits,
  RelNode rel) throws RelConversionException {
 ensure(State.STATE_5_CONVERTED);
 rel.getCluster().setMetadataProvider(
   new CachingRelMetadataProvider(
     rel.getCluster().getMetadataProvider(),
     rel.getCluster().getPlanner()));
 Program program = programs.get(ruleSetIndex);
 return program.run(planner, rel, requiredOutputTraits, ImmutableList.of(),
   ImmutableList.of());
}

  new CachingRelMetadataProvider(
    rel.getCluster().getMetadataProvider(), planner));
assertThat(colType(mq, input, 0), equalTo("DEPTNO-agg"));

  new CachingRelMetadataProvider(
    rel.getCluster().getMetadataProvider(), planner));
assertThat(colType(mq, input, 0), equalTo("DEPTNO-agg"));

RelMetadataProvider chainedProvider = ChainedRelMetadataProvider.of(list);
basePlan.getCluster().setMetadataProvider(
  new CachingRelMetadataProvider(chainedProvider, planner));

/** Checks that we can cache a metadata request that includes a null
 * argument. */
@Test public void testSelectivityAggCached() {
 RelNode rel =
   convertSql("select deptno, count(*) from emp where deptno > 10 "
     + "group by deptno having count(*) = 0");
 rel.getCluster().setMetadataProvider(
   new CachingRelMetadataProvider(
     rel.getCluster().getMetadataProvider(),
     rel.getCluster().getPlanner()));
 final RelMetadataQuery mq = RelMetadataQuery.instance();
 Double result = mq.getSelectivity(rel, null);
 assertThat(result,
   within(DEFAULT_COMP_SELECTIVITY * DEFAULT_EQUAL_SELECTIVITY, EPSILON));
}

/** Checks that we can cache a metadata request that includes a null
 * argument. */
@Test public void testSelectivityAggCached() {
 RelNode rel =
   convertSql("select deptno, count(*) from emp where deptno > 10 "
     + "group by deptno having count(*) = 0");
 rel.getCluster().setMetadataProvider(
   new CachingRelMetadataProvider(
     rel.getCluster().getMetadataProvider(),
     rel.getCluster().getPlanner()));
 final RelMetadataQuery mq = RelMetadataQuery.instance();
 Double result = mq.getSelectivity(rel, null);
 assertThat(result,
   within(DEFAULT_COMP_SELECTIVITY * DEFAULT_EQUAL_SELECTIVITY, EPSILON));
}

cluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));
hepPlanner = new HepPlanner(hepPgmBldr.build());
hepPlanner.registerMetadataProviders(list);
cluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));
hepPlanner.setRoot(calciteOptimizedPlan);
calciteOptimizedPlan = hepPlanner.findBestExp();
hepPlanner = new HepPlanner(hepPgmBldr.build());
hepPlanner.registerMetadataProviders(list);
cluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));
hepPlanner.setRoot(calciteOptimizedPlan);
calciteOptimizedPlan = hepPlanner.findBestExp();
 hepPlanner = new HepPlanner(hepPgmBldr.build());
 hepPlanner.registerMetadataProviders(list);
 cluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));
 hepPlanner.setRoot(calciteOptimizedPlan);
 calciteOptimizedPlan = hepPlanner.findBestExp();
 hepPlanner = new HepPlanner(hepPgmBldr.build());
 hepPlanner.registerMetadataProviders(list);
 cluster.setMetadataProvider(new CachingRelMetadataProvider(chainedProvider, hepPlanner));
 hepPlanner.setRoot(calciteOptimizedPlan);
 calciteOptimizedPlan = hepPlanner.findBestExp();

RelMetadataProvider plannerChain = ChainedRelMetadataProvider.of(list);
relInitial.getCluster().setMetadataProvider(
  new CachingRelMetadataProvider(plannerChain, planner));

RelMetadataProvider plannerChain = ChainedRelMetadataProvider.of(list);
relInitial.getCluster().setMetadataProvider(
  new CachingRelMetadataProvider(plannerChain, planner));