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Botong Huang edited comment on CALCITE-4514 at 3/2/21, 3:12 AM: ---------------------------------------------------------------- Hi [~danny0405], openning a new Jira for it might be an overkill. Can you fix the typo for us and push? Thx! was (Author: botong): Hi [~danny0405], openning a new Jira for it might be an overkill. Can you fix the typo for us and push? > [CALCITE-4514] Fine tune the merge order of two RelSets > ------------------------------------------------------- > > Key: CALCITE-4514 > URL: https://issues.apache.org/jira/browse/CALCITE-4514 > Project: Calcite > Issue Type: Improvement > Reporter: Botong Huang > Priority: Minor > Labels: pull-request-available > Fix For: 1.27.0 > > Time Spent: 40m > Remaining Estimate: 0h > > When merging two relsets, we have two preferences: > 1. Merge parent relset into child relset > 2. Merge newer relset into older relset > Currently, when the two relsets are parent set of each other, we randomly > pick a merge order without checking the second condition above. For > performance reasons, we should, to avoid unnecessary churn. -- This message was sent by Atlassian Jira (v8.3.4#803005)