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https://issues.apache.org/jira/browse/IMPALA-13027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Smith reassigned IMPALA-13027:
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Assignee: Jason Fehr
> Directly create exec request for query log inserts
> --------------------------------------------------
>
> Key: IMPALA-13027
> URL: https://issues.apache.org/jira/browse/IMPALA-13027
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Michael Smith
> Assignee: Jason Fehr
> Priority: Major
>
> Inserts into {{sys.impala_query_log}} can be large, as they include the query
> profile and currently 49 columns for each query. Right now inserts are
> executed via an SQL statement, which needs to be parsed by Impala's Frontend.
> This can take a non-trivial amount of time - on the order of seconds - when
> reaching the query queue limit (1000s of queries), and also require
> increasing the {{statement_expression_limit}} above 250k.
> We could improve this by directly constructing the TExecRequest for the
> insert in InternalServer (likely via a new function API). This would also let
> us avoid needing to escape strings in the SQL statement by directly
> constructing the relevant type objects.
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