[IGNITE-16629] Wrong calculation of replies count for queries with partition pruning and enabled parallelism

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.13
• Component/s: sql
• Labels: ise.lts
• Release Note: Fixed wrong calculation of replies count for queries with partition pruning and enabled parallelism
• Ignite Flags: Release Notes Required
• Assignee: Iurii Gerzhedovich
• Reporter: Iurii Gerzhedovich
• Created: 25/Feb/22 08:26
• Updated: 13/May/22 07:56
• Resolved: 28/Feb/22 17:27

Description

Currently a simple query is freezing forever if query parallelism is enabled and partition pruning extracts more than one partition. This caused by wrong replies count estimation made on a reducer node.

The problematic query looks like this: select * from t where aff_key in ('a', 'b', 'c').

Please note that field aff_key should be an affinity key and be a part of the compound PK.

Issue Links

• is duplicated by: IGNITE-16896 [Ignite 2.12.0] Long Executing Query
• links to: GitHub Pull Request #9857