poojanilangekar 6601327af6 IMPALA-8096: Add rows produced limit per query ...

This patch limits the number of rows produced by a query by
tracking it at the PlanRootSink level. When the
NUM_ROWS_PRODUCED_LIMIT is set, it cancels a query when its
execution produces more rows than the specified limit. This limit
only applies when the results are returned to a client, e.g. for a
SELECT query, but not an INSERT query.

Testing:
Added tests to query-resource-limits.test to verify that the rows
produced limit is honored.
Manually tested on various combinations of tables, fileformats
and ROWS_RETURNED_LIMIT values.

Change-Id: I7b22dbe130a368f4be1f3662a559eb9aae7f0c1d
Reviewed-on: http://gerrit.cloudera.org:8080/12328
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

2019-02-07 21:41:52 +00:00

2.5 KiB

Raw Blame History

View Raw