move pre alter table alter index SQL to private method
move pre alter table alter index SQL to private method

arima-ryunosuke/dbal,mihai-stancu/dbal,nfrignani/dbal,vutung2311/dbal,zeroedin-bill/dbal,mRoca/dbal,mathroc/dbal,vortgo/dbal,doctrine/dbal,gencer/dbal,lafourchette/dbal,arima-ryunosuke/dbal,wuxu92/dbal,mbeccati/dbal,BenMorel/dbal,helicon-os/doctrine-dbal,mRoca/dbal,DHager/dbal,kimhemsoe/dbal,mihai-stancu/doctrine-dbal,doctrine/dbal,tk-s/dbal,mikeSimonson/dbal,lafourchette/dbal,mihai-stancu/doctrine-dbal,lcobucci/dbal,shivergard/dbal,stchr/dbal,gencer/dbal,janschoenherr/dbal,vutung2311/dbal,stof/dbal,drieschel/dbal,Tobion/dbal,lcobucci/dbal,mathroc/dbal,kimhemsoe/dbal,deeky666/dbal,BenMorel/dbal,cassvail/dbal,stchr/dbal,shivergard/dbal,bspeterson/dbal,AlexDpy/dbal,zeroedin-bill/dbal,mikeSimonson/dbal,tk-s/dbal,v-bartusevicius/dbal,drieschel/dbal,deeky666/dbal,mbeccati/dbal,vortgo/dbal,v-bartusevicius/dbal,wuxu92/dbal,stof/dbal,AlexDpy/dbal,DHager/dbal,Tobion/dbal,helicon-os/doctrine-dbal,cassvail/dbal,bspeterson/dbal,mihai-stancu/dbal,janschoenherr/dbal,arima-ryunosuke/dbal,nfrignani/dbal