kvstreamer: consider setting MaxSpanRequestKeys on parallel batches issued by the Streamer #67885
Labels
C-cleanup
Tech debt, refactors, loose ends, etc. Solution not expected to significantly change behavior.
T-sql-queries
SQL Queries Team
Once #67040 is implemented, we will have a library that performs parallel scans while adhering to memory limits. In order to simplify the discussion on the RFC, we have consciously put aside thinking about queries with
LIMIT
. As a follow-up task to improving the implementation/usage of theStreamer
library we should revisit the cases when we have a hard or a soft limit and setMaxSpanRequestKeys
on the batches whenever appropriate.Quoting Nathan from the RFC review:
This discussion is applicable to lookup (not index) joins, regardless of whether the lookup columns form a key and whether there is ON expression. Quoting Becca:
Jira issue: CRDB-8760
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