Minor tweak to avoid unnecessary memory bloat when dumping extremely wide column values in -d mode.  Per report from Marty Scholes.  This doesn't completely solve the issue, because we still need multiple copies of the field value, but at least one copy can be got rid of painlessly ...
Minor tweak to avoid unnecessary memory bloat when dumping extremely wide
column values in -d mode.  Per report from Marty Scholes.  This doesn't
completely solve the issue, because we still need multiple copies of the
field value, but at least one copy can be got rid of painlessly ...

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