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https://issues.apache.org/jira/browse/IMPALA-7242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16570985#comment-16570985
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ASF subversion and git services commented on IMPALA-7242:
---------------------------------------------------------
Commit df3f1658461553a174dd27fce2edce8594aefd16 in impala's branch
refs/heads/master from aphadke
[ https://git-wip-us.apache.org/repos/asf?p=impala.git;h=df3f165 ]
IMPALA-7242/IMPALA-7243: check for overflow when converting IntVal to
DecimalValue
This change adds a check for an overflow which can happen during
converting num_buckets from IntVal to a DecimalValue during width_bucket
evaluation. An overflow can result in hitting a DCHECK if it needs int256
for intermediate evaluations or returns a wrong result otherwise.
Change-Id: Ie5808802096bb0e6cfd4ab6464538474e42cab60
Reviewed-on: http://gerrit.cloudera.org:8080/11020
Reviewed-by: Tim Armstrong <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Dcheck fails in width_bucket() function
> ---------------------------------------
>
> Key: IMPALA-7242
> URL: https://issues.apache.org/jira/browse/IMPALA-7242
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 3.1.0
> Reporter: Taras Bobrovytsky
> Assignee: Anuj Phadke
> Priority: Critical
>
> The following query hits a DCHECK:
> {code:java}
> select width_bucket(cast(-0.10 as decimal(37,30)), cast(-0.36028797018963968
> as decimal(25,25)), cast(9151517.4969773200562764155787276999832 as
> decimal(38,31)), 1328180220){code}
> Failed check:
> {code:java}
> math-functions-ir.cc:566] Check failed: overflow == false (1 vs. 0){code}
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