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Posted to issues-all@impala.apache.org by "Wenzhe Zhou (Jira)" <ji...@apache.org> on 2021/03/24 17:06:00 UTC
[jira] [Reopened] (IMPALA-10564) No error returned when inserting
an overflowed value into a decimal column
[ https://issues.apache.org/jira/browse/IMPALA-10564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wenzhe Zhou reopened IMPALA-10564:
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New test case TestDecimalOverflowExprs.test_ctas_exprs failed in S3 build.
> No error returned when inserting an overflowed value into a decimal column
> --------------------------------------------------------------------------
>
> Key: IMPALA-10564
> URL: https://issues.apache.org/jira/browse/IMPALA-10564
> Project: IMPALA
> Issue Type: Bug
> Components: Backend, Frontend
> Affects Versions: Impala 4.0
> Reporter: Wenzhe Zhou
> Assignee: Wenzhe Zhou
> Priority: Major
> Fix For: Impala 4.0
>
>
> When using CTAS statements or INSERT-SELECT statements to insert rows to table with decimal columns, Impala insert NULL for overflowed decimal values, instead of returning error. This issue happens when the data expression for the decimal column in SELECT sub-query consists at least one alias. This issue is similar as IMPALA-6340, but IMPALA-6340 only fixed the issue for the cases with the data expression for the decimal columns as constants so that the overflowed decimal values could be detected by frontend during expression analysis. If there is alias (variables) in the data expression for the decimal column, Frontend could not evaluate data expression in expression analysis phase. Only backend could evaluate the data expression when backend execute fragment instances for SELECT sub-queries. The log messages showed that the executor detected the decimal overflow error, but somehow it did not propagate the error to the coordinator, hence the error was not returned to the client.
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