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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-766) Improve code generation to handle 5000 unions in a select the union test in largeCodeGen
Date Wed, 31 Oct 2007 17:26:50 GMT

    [ https://issues.apache.org/jira/browse/DERBY-766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12539130
] 

Mamta A. Satoor commented on DERBY-766:
---------------------------------------

Actually, Kathey, if you look at the changes that went in as commit 372692, you will notice
that there was following change in db/derby/code/trunk/java/engine/org/apache/derby/impl/sql/compile/JoinNode.java.
       
protected int getNumJoinArguments()
       {
-               return 13;
+               return 12;
       }

But since the current 10.1 codeline already has getNumJoinArguments at 12, the number of arguments
never got decremented when we merged 372692 from trunk into 10.1 and that is why we saw the
mismatch in number of arguments. Hope this explains why the merge seem to go through but the
test case failed.


> Improve code generation to handle 5000 unions in a select the  union test  in largeCodeGen
> ------------------------------------------------------------------------------------------
>
>                 Key: DERBY-766
>                 URL: https://issues.apache.org/jira/browse/DERBY-766
>             Project: Derby
>          Issue Type: Sub-task
>          Components: Services
>    Affects Versions: 10.2.1.6
>            Reporter: Kathey Marsden
>            Assignee: Daniel John Debrunner
>             Fix For: 10.2.1.6, 10.3.1.4
>
>         Attachments: 372692_10_1_diff.txt
>
>
> A good incremental improvement for code generation for 10.2 would be to handle 5000 unions
in the  largeCodeGen test.
> eg.   largeUnionSelect(con, viewName, 5000);
> should pass.

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