Error ORA-12801 and ORA-32696 from parallel GROUP BY with no aggregates or COUNT(DISTINCT) (Doc ID 1139393.1)

Last updated on FEBRUARY 02, 2017

Applies to:

Oracle Server - Enterprise Edition - Version: 10.2.0.1 to 11.1.0.8 - Release: 10.2 to 11.1
Information in this document applies to any platform.
Reviewed 18-Nov-2011.

Symptoms

While querying a parallel group-by query with no aggregates,
or for a parallel query with count(distinct), then the following errors occur:

ORA-12801: error signaled in parallel query server P071
ORA-32696: HTI: No free slot

Cause

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