Hello Internal Jenkins, Dimitris Tsirogiannis, Alex Behm,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/2792
to look at the new patch set (#5).
Change subject: IMPALA-3232: Allow not-exists uncorrelated subqueries
......................................................................
IMPALA-3232: Allow not-exists uncorrelated subqueries
Before this patch, correlated exists and not exists subqueries were
rewritten as as left semi and anti joins respectively. Uncorrelated
exists subqueries were rewritten as cross joins, and uncorrelated
not-exists subqueries were not supported at all. This patch takes
advantage of the nested loop join that was recently introduced, which
allows us to rewrite both correlated and uncorrelated exists subqueries
as left semi joins and both correlated and uncorrelated not-exists
subqueries as anti joins.
Change-Id: I52ae12f116d026190f3a2a7575cda855317d11e8
---
M fe/src/main/java/com/cloudera/impala/analysis/StmtRewriter.java
M fe/src/test/java/com/cloudera/impala/analysis/AnalyzeStmtsTest.java
M fe/src/test/java/com/cloudera/impala/analysis/AnalyzeSubqueriesTest.java
M testdata/workloads/functional-planner/queries/PlannerTest/analytic-fns.test
M
testdata/workloads/functional-planner/queries/PlannerTest/subquery-rewrite.test
M testdata/workloads/functional-query/queries/QueryTest/subquery.test
6 files changed, 113 insertions(+), 34 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/92/2792/5
--
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I52ae12f116d026190f3a2a7575cda855317d11e8
Gerrit-PatchSet: 5
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Taras Bobrovytsky <[email protected]>
Gerrit-Reviewer: Alex Behm <[email protected]>
Gerrit-Reviewer: Dimitris Tsirogiannis <[email protected]>
Gerrit-Reviewer: Internal Jenkins
Gerrit-Reviewer: Taras Bobrovytsky <[email protected]>
