Update ALTER TABLE docs to mention using VACUUM FULL for rewrites.
Update ALTER TABLE docs to mention using VACUUM FULL for rewrites.

Remove the claim that ALTER TABLE .. SET DATA TYPE is the fastest way of
rewriting a table, since it no longer is.

Noah Misch and Robert Haas, based on a suggestion from Tom Lane.

xinzweb/gpdb,kmjungersen/PostgresXL,pavanvd/postgres-xl,adam8157/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,postmind-net/postgres-xl,yazun/postgres-xl,xinzweb/gpdb,snaga/postgres-xl,Postgres-XL/Postgres-XL,jmcatamney/gpdb,xinzweb/gpdb,oberstet/postgres-xl,50wu/gpdb,arcivanov/postgres-xl,jmcatamney/gpdb,techdragon/Postgres-XL,postmind-net/postgres-xl,xinzweb/gpdb,greenplum-db/gpdb,lisakowen/gpdb,arcivanov/postgres-xl,postmind-net/postgres-xl,tpostgres-projects/tPostgres,lisakowen/gpdb,yazun/postgres-xl,ovr/postgres-xl,adam8157/gpdb,snaga/postgres-xl,techdragon/Postgres-XL,greenplum-db/gpdb,Postgres-XL/Postgres-XL,50wu/gpdb,pavanvd/postgres-xl,oberstet/postgres-xl,lisakowen/gpdb,arcivanov/postgres-xl,pavanvd/postgres-xl,ashwinstar/gpdb,tpostgres-projects/tPostgres,postmind-net/postgres-xl,zeroae/postgres-xl,ovr/postgres-xl,greenplum-db/gpdb,arcivanov/postgres-xl,tpostgres-projects/tPostgres,tpostgres-projects/tPostgres,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,pavanvd/postgres-xl,lisakowen/gpdb,lisakowen/gpdb,pavanvd/postgres-xl,ovr/postgres-xl,50wu/gpdb,adam8157/gpdb,yazun/postgres-xl,Postgres-XL/Postgres-XL,ashwinstar/gpdb,adam8157/gpdb,50wu/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,snaga/postgres-xl,greenplum-db/gpdb,snaga/postgres-xl,ashwinstar/gpdb,ovr/postgres-xl,yazun/postgres-xl,ovr/postgres-xl,kmjungersen/PostgresXL,50wu/gpdb,oberstet/postgres-xl,oberstet/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,adam8157/gpdb,yazun/postgres-xl,kmjungersen/PostgresXL,xinzweb/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,ashwinstar/gpdb,50wu/gpdb,arcivanov/postgres-xl,techdragon/Postgres-XL,techdragon/Postgres-XL,zeroae/postgres-xl,ashwinstar/gpdb,jmcatamney/gpdb,50wu/gpdb,snaga/postgres-xl,zeroae/postgres-xl,lisakowen/gpdb,adam8157/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,tpostgres-projects/tPostgres,jmcatamney/gpdb,greenplum-db/gpdb,adam8157/gpdb,greenplum-db/gpdb,Postgres-XL/Postgres-XL,jmcatamney/gpdb,lisakowen/gpdb,adam8157/gpdb,lisakowen/gpdb,greenplum-db/gpdb,50wu/gpdb,postmind-net/postgres-xl,xinzweb/gpdb,zeroae/postgres-xl