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Chunwei Lei commented on CALCITE-2658: -------------------------------------- Hi, [~julianhyde] I have submitted an extra PR for introducing WindowReduceExpressionsRule at https://github.com/apache/calcite/pull/912. Please review it at your convenience.Thank you. > Introducing more ReduceExpressionRules > -------------------------------------- > > Key: CALCITE-2658 > URL: https://issues.apache.org/jira/browse/CALCITE-2658 > Project: Calcite > Issue Type: Bug > Components: core > Affects Versions: 1.17.0 > Reporter: Chunwei Lei > Assignee: Julian Hyde > Priority: Major > Fix For: 1.18.0 > > > 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)