Fixes: Growing backend when using nested function calls
Fixes: Growing backend when using nested function calls

Submitted by: wieck@sapserv.debis.de (Jan Wieck)

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