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Chunwei Lei commented on CALCITE-2658: -------------------------------------- Hi [~julianhyde] Do you or someone else have any plan on reviewing [PR#921 |https://github.com/apache/calcite/pull/921/] and [PR#912 |https://github.com/apache/calcite/pull/912/]? Thank you very much. > 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 > Labels: pull-request-available > > 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)