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https://issues.apache.org/jira/browse/IMPALA-11474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Noemi Pap-Takacs updated IMPALA-11474:
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Description: The sorter works with fixed-length tuples. The number of bytes
in a tuple is known before execution, it is available in the query plan.
However, currently the tuple size is treated as a member variable of the
TupleSorter. Using Codegen to replace this member variable by a constant in
sorter-ir.cc could speed up the quicksort phase. (was: The sorter works with
fixed-length tuples. The number of bytes in a tuple is known before execution,
it is available in the query plan. However, currently the tuple size is treated
as a member variable in the TupleSorter. Using Codegen to replace this member
variable by a constant in sorter-ir.cc could speed up the quicksort phase.)
> Codegen Tuple size in Sorter
> ----------------------------
>
> Key: IMPALA-11474
> URL: https://issues.apache.org/jira/browse/IMPALA-11474
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Noemi Pap-Takacs
> Assignee: Noemi Pap-Takacs
> Priority: Minor
>
> The sorter works with fixed-length tuples. The number of bytes in a tuple is
> known before execution, it is available in the query plan. However, currently
> the tuple size is treated as a member variable of the TupleSorter. Using
> Codegen to replace this member variable by a constant in sorter-ir.cc could
> speed up the quicksort phase.
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