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https://issues.apache.org/jira/browse/IMPALA-3712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong resolved IMPALA-3712.
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Resolution: Won't Fix
I think it's generally hard to change errors that are coming from the parser...
> Not informative syntax error in UPDATE statement
> ------------------------------------------------
>
> Key: IMPALA-3712
> URL: https://issues.apache.org/jira/browse/IMPALA-3712
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 2.6.0
> Reporter: Dimitris Tsirogiannis
> Priority: Minor
> Labels: kudu, usability
>
> A weird error is thrown when anything other than '=' is used in the SET
> portion of an UPDATE statement. Example:
> {code}
> impala-shell> update t1 set b != 1 where a = 1;
> Query: update t1 set b != 1 where a = 1;
> ERROR: AnalysisException: Syntax error in line 1:
> update t1 set b != 1 where a = 1
> ^
> Encountered: Unknown last token with id: 200
> Expected
> CAUSED BY: Exception: Syntax error
> {code}
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