Michael Smith has uploaded this change for review. ( http://gerrit.cloudera.org:8080/21484
Change subject: IMPALA-12800: Add isTrueWithNullSlots cache ...................................................................... IMPALA-12800: Add isTrueWithNullSlots cache isTrueWithNullSlots can be expensive when it has to query the backend. Many of the expressions will look similar, especially in large auto-generated expressions. Adds a cache based on the nullified expression to avoid querying the backend for expressions with identical structure. With DEBUG logging enabled for the Analyzer, computes and logs stats about the isTrueWithNullSlotsCache. Adds 'use_null_slots_cache' query option to disable caching. Documents the new option. Change-Id: Ib63f5553284f21f775d2097b6c5d6bbb63699acd --- M be/src/service/query-options.h M common/thrift/ImpalaService.thrift M common/thrift/Query.thrift M docs/impala.ditamap A docs/topics/impala_use_null_slots_cache.xml M fe/src/main/java/org/apache/impala/analysis/Analyzer.java M fe/src/main/java/org/apache/impala/planner/Planner.java 7 files changed, 125 insertions(+), 3 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/84/21484/1 -- To view, visit http://gerrit.cloudera.org:8080/21484 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: Ib63f5553284f21f775d2097b6c5d6bbb63699acd Gerrit-Change-Number: 21484 Gerrit-PatchSet: 1 Gerrit-Owner: Michael Smith <[email protected]>
