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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2014/10/17 03:34:34 UTC
[jira] [Updated] (HIVE-8492) Enhance Constant Folding to propagate
constants for simple expressions
[ https://issues.apache.org/jira/browse/HIVE-8492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ashutosh Chauhan updated HIVE-8492:
-----------------------------------
Description:
currently it propagates only for projects, can be enhanced to propagate for simple expressions like casts, e.g,
{code}
SELECT src1.key, src1.key + 1, src2.value FROM src src1 join src src2 ON src1.key = src2.key AND cast(src1.key as double) = 86;
{code}
was:
currently it propagates only for projects, can be enhanced to propagate for simple expressions like casts, e.g,
{code}
SELECT src1.key, src1.key + 1, src2.value FROM src src1 join src src2 ON src1.key = src2.key AND cast(src1.key as double) = 86;
{code}
> Enhance Constant Folding to propagate constants for simple expressions
> -----------------------------------------------------------------------
>
> Key: HIVE-8492
> URL: https://issues.apache.org/jira/browse/HIVE-8492
> Project: Hive
> Issue Type: Improvement
> Components: Logical Optimizer
> Affects Versions: 0.14.0
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
>
> currently it propagates only for projects, can be enhanced to propagate for simple expressions like casts, e.g,
> {code}
> SELECT src1.key, src1.key + 1, src2.value FROM src src1 join src src2 ON src1.key = src2.key AND cast(src1.key as double) = 86;
> {code}
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