Correct description of constraint_name in ALTER TABLE documentation.
Correct description of constraint_name in ALTER TABLE documentation.

Apparently, the old text was written at a time when the only use of
constraint_name here was for a constraint to be dropped, but that's
no longer true.

Etsuro Fujita

ashwinstar/gpdb,50wu/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,greenplum-db/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,jmcatamney/gpdb,adam8157/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,yazun/postgres-xl,jmcatamney/gpdb,50wu/gpdb,lisakowen/gpdb,yazun/postgres-xl,zeroae/postgres-xl,jmcatamney/gpdb,oberstet/postgres-xl,ovr/postgres-xl,pavanvd/postgres-xl,ovr/postgres-xl,ovr/postgres-xl,xinzweb/gpdb,jmcatamney/gpdb,xinzweb/gpdb,oberstet/postgres-xl,oberstet/postgres-xl,oberstet/postgres-xl,Postgres-XL/Postgres-XL,50wu/gpdb,adam8157/gpdb,greenplum-db/gpdb,adam8157/gpdb,yazun/postgres-xl,yazun/postgres-xl,50wu/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,adam8157/gpdb,adam8157/gpdb,xinzweb/gpdb,xinzweb/gpdb,ashwinstar/gpdb,lisakowen/gpdb,jmcatamney/gpdb,50wu/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,50wu/gpdb,techdragon/Postgres-XL,50wu/gpdb,adam8157/gpdb,adam8157/gpdb,jmcatamney/gpdb,zeroae/postgres-xl,pavanvd/postgres-xl,adam8157/gpdb,lisakowen/gpdb,yazun/postgres-xl,greenplum-db/gpdb,lisakowen/gpdb,lisakowen/gpdb,zeroae/postgres-xl,ashwinstar/gpdb,lisakowen/gpdb,ovr/postgres-xl,oberstet/postgres-xl,ashwinstar/gpdb,jmcatamney/gpdb,Postgres-XL/Postgres-XL,zeroae/postgres-xl,greenplum-db/gpdb,xinzweb/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,ashwinstar/gpdb,ovr/postgres-xl,ashwinstar/gpdb,50wu/gpdb