Fredy Wijaya has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/10858 )

Change subject: IMPALA-7027: Mulitple varchar cast fails with distinct
......................................................................


Patch Set 1:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/10858/1/fe/src/main/java/org/apache/impala/analysis/StringLiteral.java
File fe/src/main/java/org/apache/impala/analysis/StringLiteral.java:

http://gerrit.cloudera.org:8080/#/c/10858/1/fe/src/main/java/org/apache/impala/analysis/StringLiteral.java@65
PS1, Line 65: (!(type_  == null ? that.type_ == null : type_ == that.type_))
This condition is not very readable. It can be simplified to
if (type != null && type_ != that.type_) return false;


http://gerrit.cloudera.org:8080/#/c/10858/1/fe/src/test/java/org/apache/impala/analysis/ExprRewriterTest.java
File fe/src/test/java/org/apache/impala/analysis/ExprRewriterTest.java:

http://gerrit.cloudera.org:8080/#/c/10858/1/fe/src/test/java/org/apache/impala/analysis/ExprRewriterTest.java@151
PS1, Line 151:     AnalyzesOk("select distinct cast('' as varchar(101)) as a, " 
+
Need additional test for "select distinct cast('' as varchar(100)) as a, 
cast('' as varchar(101)) as b from functional.alltypes"



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I2fa5890eaa89787645c7d3d2eef976f54a34e7c0
Gerrit-Change-Number: 10858
Gerrit-PatchSet: 1
Gerrit-Owner: Adam Holley <[email protected]>
Gerrit-Reviewer: Fredy Wijaya <[email protected]>
Gerrit-Comment-Date: Thu, 05 Jul 2018 15:50:25 +0000
Gerrit-HasComments: Yes

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