Fix for memory leak in executor with fjIsNull.
Fix for memory leak in executor with fjIsNull.

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