Change heap_get_latest_tid() so that a transaction can see changes made by the transaction itself.
Change heap_get_latest_tid() so that a transaction can
see changes made by the transaction itself.

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