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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5862) There is no way to escape the special _ and % characters in DatabaseMetaData search strings
Date Fri, 20 Jul 2012 21:53:35 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419601#comment-13419601
] 

Knut Anders Hatlen commented on DERBY-5862:
-------------------------------------------

We might be able to do this without adding more internal syntax, as it looks like we accept
NULL in the escape clause if it's parameterized:

ij> prepare ps as 'select tablename from sys.systables where tablename like ''SYSD%'' escape
?';
ij> execute ps using 'values cast( null as char(1) )';
IJ WARNING: Autocommit may close using result set
TABLENAME
--------------------------------------------------------------------------------------------------------------------------------
SYSDEPENDS
SYSDUMMY1

2 rows selected
                
> There is no way to escape the special _ and % characters in DatabaseMetaData search strings
> -------------------------------------------------------------------------------------------
>
>                 Key: DERBY-5862
>                 URL: https://issues.apache.org/jira/browse/DERBY-5862
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions: 10.10.0.0
>            Reporter: Rick Hillegas
>
> And DatabaseMetaData.getSearchStringEscape() returns an empty string. We should add a
way to configure a search string escape character. See the discussion on this email thread:
http://old.nabble.com/derby-getProcedureColumns-td34176144.html#a34176144

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