Xianqing He has uploaded a new patch set (#18). ( http://gerrit.cloudera.org:8080/16266 )
Change subject: IMPALA-5022 part 1/2: Outer join simplification ...................................................................... IMPALA-5022 part 1/2: Outer join simplification Outer joins in SQL can return rows with certain columns filled with NULLs when a match can not be found. However, such rows can be rejected by null-rejecting predicates. The conditions in a null-rejecting predicate that are always evaluated to FALSE for NULLs are referred to as null-filtering conditions. In general, an outer join can be converted to an inner join if there exist null-filtering conditions on the inner tables. In a left outer join, the right table is the inner table, while in a right outer join it is the left table. In a full outer join, both tables are inner tables. 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 A.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 6. A LEFT JOIN B ON A.id = B.id INNER JOIN C ON B.id = C.id = A INNER JOIN B ON A.id = B.id INNER JOIN C ON B.id = C.id 7. A RIGHT JOIN B ON A.id = B.id INNER JOIN C ON A.id = C.id = A INNER JOIN B ON A.id = B.id INNER JOIN C ON A.id = C.id 8. A FULL JOIN B ON A.id = B.id INNER JOIN C ON A.id = C.id = A LEFT JOIN B ON A.id = B.id INNER JOIN C ON A.id = C.id 9. A FULL JOIN B ON A.id = B.id INNER JOIN C ON B.id = C.id = A RIGHT JOIN B ON A.id = B.id INNER JOIN C ON B.id = C.id 10. A FULL JOIN B ON A.id = B.id INNER JOIN C ON A.id + B.id = C.id = A INNER JOIN B ON A.id = B.id INNER JOIN C ON A.id + B.id = C.id In this commit, we have supported most of the cases that can convert an outer join to an inner join, except for converting the embedding inline view outer join by the join condition like "SELECT * FROM T1 JOIN (SELECT T3.A A FROM T2 LEFT JOIN T3 ON T3.B=T2.B) T4 ON T4.A=T1.A". We will support it in part 2. Tests: * Update the baseline plan Tests * Add new plan tests outer-to-inner-joins.test * Add new query tests to verify the correctness on transformation * Ran the full set of verifications in Impala Public Jenkins Change-Id: Iaa7804033fac68e93f33c387dc68ef67f803e93e --- M be/src/service/query-options.cc M be/src/service/query-options.h M common/thrift/ImpalaInternalService.thrift M common/thrift/ImpalaService.thrift 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/analysis/FunctionCallExpr.java M fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java M fe/src/test/java/org/apache/impala/planner/PlannerTest.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-hdfs-num-rows-est-enabled.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 A testdata/workloads/functional-planner/queries/PlannerTest/outer-to-inner-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 M testdata/workloads/functional-query/queries/QueryTest/explain-level2.test M testdata/workloads/functional-query/queries/QueryTest/nested-types-parquet-stats.test A testdata/workloads/functional-query/queries/QueryTest/outer-to-inner-joins.test M testdata/workloads/functional-query/queries/QueryTest/parquet-filtering.test M tests/query_test/test_join_queries.py 34 files changed, 2,933 insertions(+), 1,198 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/66/16266/18 -- 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: newpatchset Gerrit-Change-Id: Iaa7804033fac68e93f33c387dc68ef67f803e93e Gerrit-Change-Number: 16266 Gerrit-PatchSet: 18 Gerrit-Owner: Xianqing He <hexianqing...@126.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Qifan Chen <qc...@cloudera.com> Gerrit-Reviewer: Shant Hovsepian <sh...@cloudera.com> Gerrit-Reviewer: Xianqing He <hexianqing...@126.com>
