[jira] [Resolved] (CALCITE-2658) Introducing more ReduceExpressionRules

["Haisheng Yuan (JIRA)" <ji...@apache.org>]

     [ 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)