- add length to varchars
- add length to varchars

robin900/sqlalchemy,halfcrazy/sqlalchemy,ThiefMaster/sqlalchemy,zzzeek/sqlalchemy,hsum/sqlalchemy,276361270/sqlalchemy,Cito/sqlalchemy,epa/sqlalchemy,EvaSDK/sqlalchemy,davidfraser/sqlalchemy,inspirehep/sqlalchemy,276361270/sqlalchemy,hsum/sqlalchemy,olemis/sqlalchemy,bdupharm/sqlalchemy,epa/sqlalchemy,itkovian/sqlalchemy,brianv0/sqlalchemy,EvaSDK/sqlalchemy,pdufour/sqlalchemy,robin900/sqlalchemy,sqlalchemy/sqlalchemy,Cito/sqlalchemy,WinterNis/sqlalchemy,inspirehep/sqlalchemy,dstufft/sqlalchemy,Cito/sqlalchemy,Akrog/sqlalchemy,wujuguang/sqlalchemy,bootandy/sqlalchemy,bdupharm/sqlalchemy,wujuguang/sqlalchemy,wfxiang08/sqlalchemy,alex/sqlalchemy,Akrog/sqlalchemy,sandan/sqlalchemy,halfcrazy/sqlalchemy,pdufour/sqlalchemy,monetate/sqlalchemy,wfxiang08/sqlalchemy,davidjb/sqlalchemy,davidjb/sqlalchemy,monetate/sqlalchemy,elelianghh/sqlalchemy,WinterNis/sqlalchemy,itkovian/sqlalchemy,j5int/sqlalchemy,graingert/sqlalchemy,alex/sqlalchemy,olemis/sqlalchemy,ThiefMaster/sqlalchemy,elelianghh/sqlalchemy,brianv0/sqlalchemy,graingert/sqlalchemy,bootandy/sqlalchemy,j5int/sqlalchemy,dstufft/sqlalchemy,alex/sqlalchemy,sandan/sqlalchemy,davidfraser/sqlalchemy