handle null tablespace_name
handle null tablespace_name

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