Provide the libpq error message when PQputline or PQendcopy fails.
Provide the libpq error message when PQputline or PQendcopy fails.

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