This patch fixes a minor inaccuracy in the documentation: NOT NULL is not synonymous with CHECK (xxx IS NOT NULL) -- for example, consider ALTER TABLE ADD PRIMARY KEY, which checks for 'NOT NULL', not a check constraint.
This patch fixes a minor inaccuracy in the documentation: NOT NULL is
not synonymous with CHECK (xxx IS NOT NULL) -- for example, consider
ALTER TABLE ADD PRIMARY KEY, which checks for 'NOT NULL', not a check
constraint.

Neil Conway

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