Allow update x =-3, not just x = -3.
Allow update x =-3, not just x = -3.

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