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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-4789) Always apply the bulk-insert optimization when inserting from a table function.
Date Wed, 19 Sep 2012 17:29:07 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13458872#comment-13458872
] 

Mamta A. Satoor commented on DERBY-4789:
----------------------------------------

DERBY-4789 (Always apply the bulk-insert optimization when inserting from a table function.)
DERBY-5614 (NullPointerException with INSERT INTO [global temporary table] SELECT ... FROM
[VTI])

The changes for DERBY-5614 depend on the changes for DERBY-4789.

Backported both these jiras into 10.6.2.3 with revision 1387685.

                
> Always apply the bulk-insert optimization when inserting from a table function.
> -------------------------------------------------------------------------------
>
>                 Key: DERBY-4789
>                 URL: https://issues.apache.org/jira/browse/DERBY-4789
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Rick Hillegas
>             Fix For: 10.7.1.1
>
>         Attachments: derby-4789-01-ab-alwaysForTableFunctions.diff, DERBY-4789-AddMoreTests3.diff,
DERBY-4789-QuestionTest2.diff, DERBY-4789-QuestionTest.diff, TableFunctionTest.java
>
>
> Inserting from a table function is a lot like importing from a file:
> 1) Derby has limited visibility into the size of the external data source.
> 2) The user is often trying to import a large data set.
> The import procedures assume that Derby should always apply the bulk-insert optimization
when importing from a file. The same assumption seems reasonable whenever a table function
appears in the source stream of an INSERT.

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