[ https://issues.apache.org/jira/browse/CALCITE-2658?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Haisheng Yuan resolved CALCITE-2658. ------------------------------------ Resolution: Fixed Fix Version/s: 1.20.0 > Introducing more ReduceExpressionRules > -------------------------------------- > > Key: CALCITE-2658 > URL: https://issues.apache.org/jira/browse/CALCITE-2658 > Project: Calcite > Issue Type: Bug > Components: core > Reporter: Chunwei Lei > Assignee: Chunwei Lei > Priority: Major > Labels: pull-request-available > Fix For: 1.20.0 > > Time Spent: 2h 20m > Remaining Estimate: 0h > > It is useful to have rules reducing Exchange/Sort/SortExchange keys, e.g., > SELECT key,value FROM (SELECT 1 AS key, value FROM src) r DISTRIBUTE BY key; > can be reduced to > SELECT 1 AS key, value FROM src; # Since singleton requirement may already > required by SELECT. > SELECT key,value FROM (SELECT 1 AS key, value FROM src) r ORDER BY key; > can be reduced to > SELECT 1 AS key, value FROM src; # Since ordering on constant is useless. -- This message was sent by Atlassian JIRA (v7.6.3#76005)