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https://issues.apache.org/jira/browse/FLINK-19395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17202000#comment-17202000
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Timo Walther commented on FLINK-19395:
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Thanks [~ShawnHx]. I assigned you to this issue. Please replace all
`unsupported` or `unexpected` exceptions with `TableException` and invalid user
input with `ValidationException`.
> Replace SqlConversionException with either TableException or
> ValidationException
> --------------------------------------------------------------------------------
>
> Key: FLINK-19395
> URL: https://issues.apache.org/jira/browse/FLINK-19395
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Legacy Planner, Table SQL / Planner
> Reporter: Timo Walther
> Assignee: Xiao Huang
> Priority: Major
> Labels: starter
>
> We should avoid creating too many different exceptions without reason.
> `SqlConversionException` is not necessary and can be replaced by the two
> commonly used exceptions for TableException or ValidationException.
> Currently, we throw all three in `SqlToOperation` converters.
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