zhuwenzhuang opened a new pull request, #4795:
URL: https://github.com/apache/calcite/pull/4795
Fire rule cache prevents fire same Rule on same RelNode list to reduce
HepPlanner's latency.
If this cache enabled, every match order can benefit from less fire rules.
Test result:
` @Test void testRuleApplyCount() {
long applyTimes = checkRuleApplyCount(HepMatchOrder.ARBITRARY, false);
// disable fireRuleCache
assertThat(applyTimes, is(316L));
applyTimes = checkRuleApplyCount(HepMatchOrder.DEPTH_FIRST, false);
assertThat(applyTimes, is(87L));
applyTimes = checkRuleApplyCount(HepMatchOrder.TOP_DOWN, false);
assertThat(applyTimes, is(295L));
applyTimes = checkRuleApplyCount(HepMatchOrder.BOTTOM_UP, false);
assertThat(applyTimes, is(296L));
applyTimes = checkRuleApplyCount(HepMatchOrder.ARBITRARY, true); //
enable fireRuleCache
assertThat(applyTimes, is(65L));
applyTimes = checkRuleApplyCount(HepMatchOrder.DEPTH_FIRST, true);
assertThat(applyTimes, is(65L));
applyTimes = checkRuleApplyCount(HepMatchOrder.TOP_DOWN, true);
assertThat(applyTimes, is(65L));
applyTimes = checkRuleApplyCount(HepMatchOrder.BOTTOM_UP, true);
assertThat(applyTimes, is(65L));
}`
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