[doc] Restructure the documentation
* Create a new index file
* Move the sphinx configuration files do the documentation root
* Move book/README to dev/documenting.rst
* Move book/mode_plan.py to tools/
* Move book/en/images to images
* Move book/en/* to book/
* Move changelogs to changes/*
* Adapt the Makefile
* Add a title to the javascript api index
Related to #4832808
/* -*- sql -*-
mysql specific registered procedures,
*/
/* XXX limit_size version dealing with format as postgres version does.
XXX mysql doesn't support overloading, each function should have a different name
NOTE: fulltext renamed since it cause a mysql name conflict
*/
CREATE FUNCTION text_limit_size(vfulltext TEXT, maxsize INT)
RETURNS TEXT
NO SQL
BEGIN
IF LENGTH(vfulltext) < maxsize THEN
RETURN vfulltext;
ELSE
RETURN SUBSTRING(vfulltext from 1 for maxsize) || '...';
END IF;
END ;;