Emphasize that immutable and stable functions are not allowed to modify the database.  xfunc.sgml was already pretty definite on the point, but it doesn't hurt to make it clear here too.
Emphasize that immutable and stable functions are not allowed to modify
the database.  xfunc.sgml was already pretty definite on the point, but
it doesn't hurt to make it clear here too.

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