Joe McDonnell has posted comments on this change. Change subject: IMPALA-4792: Fix number of distinct values for a CASE with constant outputs ......................................................................
Patch Set 3: (3 comments) http://gerrit.cloudera.org:8080/#/c/5768/3/fe/src/main/java/org/apache/impala/analysis/CaseExpr.java File fe/src/main/java/org/apache/impala/analysis/CaseExpr.java: Line 393: long numOutputConstants = 0; > int is fine here, if you overflow that we have other problems. Done Line 402: if ((i - loopStart) % 2 == 1 || (i == children_.size() - 1 && hasElseExpr_)) { > check the negation and continue (to save one indentation level). Done Line 409: if (constLiteralSet.add(outputLiteral)) ++numOutputConstants; > nice optimization. is there a test for that? I hand tested it. I was looking through our tests, and it would be easy for me to add a SQL to QueryTest/explain-level2.test to test this patch's behavior. -- To view, visit http://gerrit.cloudera.org:8080/5768 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I21dbdaad8452b7e58c477612b47847dccd9d98d2 Gerrit-PatchSet: 3 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Joe McDonnell <[email protected]> Gerrit-Reviewer: Alex Behm <[email protected]> Gerrit-Reviewer: Joe McDonnell <[email protected]> Gerrit-Reviewer: Marcel Kornacker <[email protected]> Gerrit-HasComments: Yes
