Better error message if table exists.
Better error message if table exists.

xuegang/gpdb,CraigHarris/gpdb,lisakowen/gpdb,ahachete/gpdb,adam8157/gpdb,chrishajas/gpdb,Chibin/gpdb,yuanzhao/gpdb,edespino/gpdb,greenplum-db/gpdb,ahachete/gpdb,cjcjameson/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,ovr/postgres-xl,edespino/gpdb,oberstet/postgres-xl,tpostgres-projects/tPostgres,ashwinstar/gpdb,adam8157/gpdb,snaga/postgres-xl,ovr/postgres-xl,janebeckman/gpdb,tangp3/gpdb,greenplum-db/gpdb,lisakowen/gpdb,ashwinstar/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,0x0FFF/gpdb,snaga/postgres-xl,yazun/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,royc1/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,cjcjameson/gpdb,rubikloud/gpdb,tangp3/gpdb,randomtask1155/gpdb,rvs/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,royc1/gpdb,lintzc/gpdb,rvs/gpdb,edespino/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,tangp3/gpdb,zaksoup/gpdb,Chibin/gpdb,arcivanov/postgres-xl,edespino/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,atris/gpdb,foyzur/gpdb,royc1/gpdb,adam8157/gpdb,edespino/gpdb,janebeckman/gpdb,xinzweb/gpdb,yazun/postgres-xl,ahachete/gpdb,zaksoup/gpdb,jmcatamney/gpdb,edespino/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,50wu/gpdb,cjcjameson/gpdb,pavanvd/postgres-xl,pavanvd/postgres-xl,0x0FFF/gpdb,ovr/postgres-xl,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,janebeckman/gpdb,edespino/gpdb,oberstet/postgres-xl,xuegang/gpdb,janebeckman/gpdb,royc1/gpdb,zaksoup/gpdb,postmind-net/postgres-xl,50wu/gpdb,zeroae/postgres-xl,Chibin/gpdb,ovr/postgres-xl,atris/gpdb,janebeckman/gpdb,kmjungersen/PostgresXL,50wu/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,janebeckman/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,zeroae/postgres-xl,rubikloud/gpdb,postmind-net/postgres-xl,tangp3/gpdb,rubikloud/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,rvs/gpdb,foyzur/gpdb,rubikloud/gpdb,0x0FFF/gpdb,ahachete/gpdb,randomtask1155/gpdb,janebeckman/gpdb,chrishajas/gpdb,janebeckman/gpdb,kaknikhil/gpdb,foyzur/gpdb,tpostgres-projects/tPostgres,ashwinstar/gpdb,chrishajas/gpdb,adam8157/gpdb,lisakowen/gpdb,lpetrov-pivotal/gpdb,tpostgres-projects/tPostgres,oberstet/postgres-xl,rubikloud/gpdb,50wu/gpdb,kmjungersen/PostgresXL,lpetrov-pivotal/gpdb,techdragon/Postgres-XL,rvs/gpdb,ahachete/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,lintzc/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,Quikling/gpdb,postmind-net/postgres-xl,Postgres-XL/Postgres-XL,0x0FFF/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,techdragon/Postgres-XL,Quikling/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,xuegang/gpdb,Chibin/gpdb,arcivanov/postgres-xl,foyzur/gpdb,lpetrov-pivotal/gpdb,lpetrov-pivotal/gpdb,randomtask1155/gpdb,zaksoup/gpdb,yazun/postgres-xl,Quikling/gpdb,ashwinstar/gpdb,snaga/postgres-xl,Chibin/gpdb,rvs/gpdb,randomtask1155/gpdb,xuegang/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,zaksoup/gpdb,janebeckman/gpdb,atris/gpdb,yazun/postgres-xl,jmcatamney/gpdb,pavanvd/postgres-xl,postmind-net/postgres-xl,xinzweb/gpdb,atris/gpdb,0x0FFF/gpdb,royc1/gpdb,royc1/gpdb,tangp3/gpdb,kaknikhil/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,randomtask1155/gpdb,Chibin/gpdb,yuanzhao/gpdb,janebeckman/gpdb,yuanzhao/gpdb,foyzur/gpdb,chrishajas/gpdb,xinzweb/gpdb,atris/gpdb,yuanzhao/gpdb,lisakowen/gpdb,chrishajas/gpdb,arcivanov/postgres-xl,lisakowen/gpdb,xuegang/gpdb,xinzweb/gpdb,kaknikhil/gpdb,edespino/gpdb,50wu/gpdb,xuegang/gpdb,yazun/postgres-xl,rvs/gpdb,lpetrov-pivotal/gpdb,lintzc/gpdb,Quikling/gpdb,pavanvd/postgres-xl,greenplum-db/gpdb,cjcjameson/gpdb,50wu/gpdb,kmjungersen/PostgresXL,kaknikhil/gpdb,randomtask1155/gpdb,lintzc/gpdb,Quikling/gpdb,foyzur/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,50wu/gpdb,postmind-net/postgres-xl,foyzur/gpdb,royc1/gpdb,atris/gpdb,ahachete/gpdb,rubikloud/gpdb,cjcjameson/gpdb,adam8157/gpdb,royc1/gpdb,CraigHarris/gpdb,CraigHarris/gpdb,ahachete/gpdb,xuegang/gpdb,lisakowen/gpdb,chrishajas/gpdb,lisakowen/gpdb,snaga/postgres-xl,techdragon/Postgres-XL,jmcatamney/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,zaksoup/gpdb,tangp3/gpdb,adam8157/gpdb,oberstet/postgres-xl,chrishajas/gpdb,zaksoup/gpdb,50wu/gpdb,zeroae/postgres-xl,Postgres-XL/Postgres-XL,lintzc/gpdb,0x0FFF/gpdb,tangp3/gpdb,atris/gpdb,lintzc/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,randomtask1155/gpdb,ahachete/gpdb,ovr/postgres-xl,foyzur/gpdb,Chibin/gpdb,jmcatamney/gpdb,lintzc/gpdb,atris/gpdb,snaga/postgres-xl,kmjungersen/PostgresXL,rvs/gpdb,rvs/gpdb,cjcjameson/gpdb,arcivanov/postgres-xl,Quikling/gpdb,xinzweb/gpdb,CraigHarris/gpdb,greenplum-db/gpdb,edespino/gpdb,Quikling/gpdb,zaksoup/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,CraigHarris/gpdb,tangp3/gpdb,lisakowen/gpdb,Postgres-XL/Postgres-XL,cjcjameson/gpdb,xuegang/gpdb,ashwinstar/gpdb,rubikloud/gpdb,rvs/gpdb,edespino/gpdb,Quikling/gpdb,xinzweb/gpdb,yuanzhao/gpdb,adam8157/gpdb,lintzc/gpdb,arcivanov/postgres-xl,xuegang/gpdb,pavanvd/postgres-xl,rubikloud/gpdb,CraigHarris/gpdb,chrishajas/gpdb,Quikling/gpdb,rvs/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,kmjungersen/PostgresXL,greenplum-db/gpdb,lintzc/gpdb