New mdtruncate() & smgrtruncate() funcs.
New mdtruncate() & smgrtruncate() funcs.

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