[TYPO3-core] RFC #15001: Bugfix: It is not possible to search for '%' or '_' inside the Backend

[caspar at gosign.de]

This is an SVN patch request.

Type: Performance

Bugtracker references:
http://bugs.typo3.org/view.php?id=15001

Branches:
TYPO3_4-2, TYPO3_4-3, TYPO3_4-4, Trunk

Problem:
Neither with the search-button in the Backend-Toolbar, nor within the
Admin-Tool 'DB check' with the 'full search' function, it is possible to
search for the chars '%' and '_'.
Both functions does not escape the named chars for using inside the
like-query, so they are interpreted as wildcards by sql.
Additionally the Toolbar-search does not use the function
t3lib_db->searchQuery, which should be used for dbal support.

Solution:
adding t3lib_db->escapeStrForLike into t3lib_db->searchQuery
using t3lib_db->searchQuery inside the Toolbar-search (class.db_list.inc)

Caspar
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