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https://issues.apache.org/jira/browse/IMPALA-14506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pranav Yogi Lodha updated IMPALA-14506:
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Description:
Impala’s existing JDBC Storage Handler fetches entire datasets into Impala
before applying filters, sorting, or limits locally. This results in
significant performance overhead for analytical workloads over large external
datasets.
With this enhancement, Impala will push supported SQL clauses directly to the
remote database, thereby minimizing data movement, utilizing remote compute
efficiently, and aligning with the broader goal of federated query optimization.
> Pushdown Predicate support for External JDBC Tables(WHERE, ORDER BY, LIMIT)
> ---------------------------------------------------------------------------
>
> Key: IMPALA-14506
> URL: https://issues.apache.org/jira/browse/IMPALA-14506
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Pranav Yogi Lodha
> Assignee: Pranav Yogi Lodha
> Priority: Major
>
> Impala’s existing JDBC Storage Handler fetches entire datasets into Impala
> before applying filters, sorting, or limits locally. This results in
> significant performance overhead for analytical workloads over large external
> datasets.
> With this enhancement, Impala will push supported SQL clauses directly to the
> remote database, thereby minimizing data movement, utilizing remote compute
> efficiently, and aligning with the broader goal of federated query
> optimization.
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