PHPCAS-113 Fixes that db interface to be compatible with other database.
PHPCAS-113 Fixes that db interface to be compatible with other database.

git-svn-id: 94f0db08461a0213b6c0921e79b985cd37b48048@23698 f5dbab47-78f9-eb45-b975-e544023573eb

mickelfeng/phpCAS,fh/phpCAS,Jasig/phpCAS,yangchunyong/phpCAS,rakesh-mohanta/phpCAS,chand3040/phpCAS,neopeak/phpCAS,snelg/phpCAS