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From "Marcel Kornacker (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-1861: Simplify conditionals with constant conditions
Date Thu, 12 Jan 2017 04:50:48 GMT
Marcel Kornacker has posted comments on this change.

Change subject: IMPALA-1861: Simplify conditionals with constant conditions
......................................................................


Patch Set 7:

(4 comments)

http://gerrit.cloudera.org:8080/#/c/5585/7/fe/src/main/java/org/apache/impala/rewrite/SimplifyConditionalsRule.java
File fe/src/main/java/org/apache/impala/rewrite/SimplifyConditionalsRule.java:

Line 154:     // Contains all 'when' clauses with non-constant conditions, used to contruct
the new
construct


Line 157:     Expr elseExpr = null;
comment: first constant true when clause


Line 188:         // Otherwise, this WHEN is always FALSE, so it can be removed.
this can be misread to apply to the following else if


Line 189:       } else if (!(whenExpr instanceof NullLiteral)) {
can whenExpr be a null literal, given l160?


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Gerrit-MessageType: comment
Gerrit-Change-Id: Id70aaf9fd99f64bd98175b7e2dbba28f350e7d3b
Gerrit-PatchSet: 7
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Thomas Tauber-Marshall <tmarshall@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.behm@cloudera.com>
Gerrit-Reviewer: Bharath Vissapragada <bharathv@cloudera.com>
Gerrit-Reviewer: Marcel Kornacker <marcel@cloudera.com>
Gerrit-Reviewer: Thomas Tauber-Marshall <tmarshall@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-HasComments: Yes

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