Fix subsection ordering (DISTINCT should be described before LIMIT).
Fix subsection ordering (DISTINCT should be described before LIMIT).

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