Outer join updates, miscellaneous polishing.
Outer join updates, miscellaneous polishing.

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