Daniel Becker has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/20184 )

Change subject: IMPALA-10173: Fix substitution for unsafe expressions, 
column-level compatibility check
......................................................................


Patch Set 2:

(12 comments)

http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@7
PS2, Line 7:
Add (Addendum), as the Jira ticket is not specifically for this change.


http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@9
PS2, Line 9: fixes
Could you describe what the problem was? A test could be added for a 
problematic query.


http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@10
PS2, Line 10: now
We often describe the state before the change as "now" in commit messages. This 
may not be a good habit, but I think we should be more explicit here, we could 
say "after this change".


http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@12
PS2, Line 12:
I'd put the following sentences in a new paragraph, as they address a different 
problem.


http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@13
PS2, Line 13: now
See comment on L10.


http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@15
PS2, Line 15: ,
Nit: comma not needed.


http://gerrit.cloudera.org:8080/#/c/20184/2//COMMIT_MSG@16
PS2, Line 16: another one contains non-constant expressions with regular casts 
in one
Could also add an example of what didn't use to work but works now.


http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/CastExpr.java
File fe/src/main/java/org/apache/impala/analysis/CastExpr.java:

http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/CastExpr.java@55
PS2, Line 55: defined
Nit: . (full stop) at the end.


http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/CastExpr.java@56
PS2, Line 56:   private TypeCompatibility compatibility_ = 
TypeCompatibility.DEFAULT;
Could be final.


http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/Expr.java
File fe/src/main/java/org/apache/impala/analysis/Expr.java:

http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/Expr.java@1115
PS2, Line 1115: castExpr
Optional: could be 'thisCastExpr'.


http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/NullLiteral.java
File fe/src/main/java/org/apache/impala/analysis/NullLiteral.java:

http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/NullLiteral.java@48
PS2, Line 48: TypeCompatibility.DEFAULT
Optional: you could use the 1-argument overload inherited from Expr.


http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/NumericLiteral.java
File fe/src/main/java/org/apache/impala/analysis/NumericLiteral.java:

http://gerrit.cloudera.org:8080/#/c/20184/2/fe/src/main/java/org/apache/impala/analysis/NumericLiteral.java@470
PS2, Line 470:       return new CastExpr(targetType, this);
Don't we need to use 'compatibility' here?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I39d13f177482f74ec39570118adab609444c6929
Gerrit-Change-Number: 20184
Gerrit-PatchSet: 2
Gerrit-Owner: Peter Rozsa <pro...@cloudera.com>
Gerrit-Reviewer: Daniel Becker <daniel.bec...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Comment-Date: Tue, 11 Jul 2023 16:05:07 +0000
Gerrit-HasComments: Yes

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