[ https://issues.apache.org/jira/browse/CALCITE-3713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiening Dai reopened CALCITE-3713: ---------------------------------- The fix incurs performance overhead when using mapDigestToVertex, mapDigestToRel, since now the hash code of List<RelDataType> has to be recomputed every time. See more discussion at https://github.com/apache/calcite/pull/1740 > Remove column names from Project#digest > --------------------------------------- > > Key: CALCITE-3713 > URL: https://issues.apache.org/jira/browse/CALCITE-3713 > Project: Calcite > Issue Type: Bug > Components: core > Affects Versions: 1.21.0 > Reporter: Vladimir Sitnikov > Assignee: Vladimir Sitnikov > Priority: Major > Labels: pull-request-available > Fix For: 1.22.0 > > Time Spent: 4h > Remaining Estimate: 0h > > Projects that differ with column names only are equivalent, so the planning > space can be reduced if field names do not participate in relation matching. > For instance, {{Project(input=rel#1,empid=$0)}} and > {{Project(input=rel#1,deptno=$0)}} are equivalent -- This message was sent by Atlassian Jira (v8.3.4#803005)