[TYPO3-core] RFC #9797: Bug: waste of time in LIST module with LOISmode

[Franz Holzinger]

This is an SVN patch request.

Type: Bugfix

Bugtracker references:
  http://bugs.typo3.org/view.php?id=9797

Branches:
TYPO3_4-2 & trunk

Problem:
When you want to use the mode to list the tables only in single table 
view (LOISmode), then big and slow SQL queries are unnecessarily still 
performed. This might cost some seconds of execution time.

Solution:
Do not perform this unnecessary SQL query over all records in LOIS mode, 
when only the count of records has been needed. The read in records are 
nowhere used.

Notes:
set page TSconfig:
mod.web_list.listOnlyInSingleTableView = 1


- Franz
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