Update:
Update:

< * Have DEFAULT dependency track use of sequence, for DROP DEFAULT check
> * Disallow changing default expression of a SERIAL column

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