Revise searching of subplan target lists to use something more efficient than tlist_member calls.  Building a large join tlist is still O(N^2), but with a much smaller constant factor than before.
Revise searching of subplan target lists to use something more efficient
than tlist_member calls.  Building a large join tlist is still O(N^2),
but with a much smaller constant factor than before.

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