Xianqing He has uploaded this change for review. ( http://gerrit.cloudera.org:8080/16266
Change subject: IMPALA-5022: Outer join simplification ...................................................................... IMPALA-5022: Outer join simplification As a general rule, an outer join can be converted to an inner join if there is a condition on the inner table that filters out non‑matching rows. In a left outer join, the right table is the inner table, while it is the left table in a right outer join. In a full outer join, both tables are inner tables. Conditions that are FALSE for nulls are referred to as null filtering conditions, and these are the conditions that enable the outer‑to‑inner join conversion to be made. An outer join can be converted to an inner join if the WHERE clause contains at least one null rejecting condition on the inner table. For example, 1. A LEFT JOIN B ON A.id = B.id WHERE B.v > 10 = A INNER JOIN B ON A.id = B.id WHERE B.v > 10 2. A RIGHT JOIN B ON A.id = B.id WHERE A.v > 10 = A INNER JOIN B ON A.id = B.id WHERE B.v > 10 3. A FULL JOIN B ON A.id = B.id WHERE A.v > 10 = A LEFT JOIN B ON A.id = B.id WHERE A.v > 10 4. A FULL JOIN B ON A.id = B.id WHERE B.v > 10 = A RIGHT JOIN B ON A.id = B.id WHERE B.v > 10 5. A FULL JOIN B ON A.id = B.id WHERE A.v > 10 AND B.v > 10 = A INNER JOIN B ON A.id = B.id WHERE A.v > 10 AND B.v > 10 Tests: * Update the baseline plan Tests * Add some plan tests * Ran the full set of verifications in Impala Public Jenkins Change-Id: Iaa7804033fac68e93f33c387dc68ef67f803e93e --- M fe/src/main/java/org/apache/impala/analysis/Analyzer.java M fe/src/main/java/org/apache/impala/analysis/Expr.java M fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java M testdata/workloads/functional-planner/queries/PlannerTest/analytic-fns.test M testdata/workloads/functional-planner/queries/PlannerTest/card-outer-join.test M testdata/workloads/functional-planner/queries/PlannerTest/constant-folding.test M testdata/workloads/functional-planner/queries/PlannerTest/convert-to-cnf.test M testdata/workloads/functional-planner/queries/PlannerTest/fk-pk-join-detection.test M testdata/workloads/functional-planner/queries/PlannerTest/implicit-joins.test M testdata/workloads/functional-planner/queries/PlannerTest/inline-view-limit.test M testdata/workloads/functional-planner/queries/PlannerTest/inline-view.test M testdata/workloads/functional-planner/queries/PlannerTest/join-order.test M testdata/workloads/functional-planner/queries/PlannerTest/joins.test M testdata/workloads/functional-planner/queries/PlannerTest/kudu.test M testdata/workloads/functional-planner/queries/PlannerTest/nested-collections.test M testdata/workloads/functional-planner/queries/PlannerTest/nested-loop-join.test M testdata/workloads/functional-planner/queries/PlannerTest/outer-joins.test M testdata/workloads/functional-planner/queries/PlannerTest/parquet-filtering.test M testdata/workloads/functional-planner/queries/PlannerTest/predicate-propagation.test M testdata/workloads/functional-planner/queries/PlannerTest/runtime-filter-propagation.test M testdata/workloads/functional-planner/queries/PlannerTest/subquery-rewrite.test 21 files changed, 1,544 insertions(+), 968 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/66/16266/3 -- To view, visit http://gerrit.cloudera.org:8080/16266 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: Iaa7804033fac68e93f33c387dc68ef67f803e93e Gerrit-Change-Number: 16266 Gerrit-PatchSet: 3 Gerrit-Owner: Xianqing He <[email protected]>
