Add defenses against invalid operator names passed in CREATE OPERATOR arguments (where the parser doesn't check them already).  Minor code cleanups too.
Add defenses against invalid operator names passed in CREATE OPERATOR
arguments (where the parser doesn't check them already).  Minor code
cleanups too.

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