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https://issues.apache.org/jira/browse/HIVE-2427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13261033#comment-13261033
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Phabricator commented on HIVE-2427:
-----------------------------------
njain has commented on the revision "HIVE-2427 [jira] Warn user that precision
is lost when bigint is implicitly cast to double in joins and unions.".
INLINE COMMENTS
ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java:5180 This
piece of code seems to be repeated - can you make a function
out of it, and reuse it.
ql/src/java/org/apache/hadoop/hive/ql/plan/ExprNodeGenericFuncDesc.java:198
same as above
REVISION DETAIL
https://reviews.facebook.net/D2181
> Warn user that precision is lost when bigint is implicitly cast to double in
> joins and unions.
> ----------------------------------------------------------------------------------------------
>
> Key: HIVE-2427
> URL: https://issues.apache.org/jira/browse/HIVE-2427
> Project: Hive
> Issue Type: Improvement
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Attachments: HIVE-2427.1.patch.txt, HIVE-2427.2.patch.txt,
> HIVE-2427.3.patch.txt, HIVE-2427.D2181.1.patch
>
>
> When a bigint is implicitly cast to a double (when a bigint is involved in an
> equality expression with a string or double as part of a join condition, or
> when a bigint column is to be combined with a string or double column as part
> of a union) precision may be lost, resulting in unexpected behavior. Until we
> fix the underlying issue we should throw an error in strict mode, and a
> warning in nonstrict mode alerting the user about this.
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