Remove dead and broken support to print target lists in EXPLAIN.
Remove dead and broken support to print target lists in EXPLAIN.

It was dead, because printTList field was never set. It was broken, because
when show_plan_tlist() called deparse_context_for_plan(), it passed
Plan nodes as arguments, while deparse_context_for_plan() expects them to
be RangeTblEntrys.

Too bad, the ability to print each node's target list would've been really
helpful. EXPLAIN VERBOSE in later PostgreSQL versions does that, so we'll
get there eventually...

Chibin/gpdb,50wu/gpdb,zaksoup/gpdb,edespino/gpdb,janebeckman/gpdb,edespino/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,rubikloud/gpdb,50wu/gpdb,lintzc/gpdb,edespino/gpdb,ashwinstar/gpdb,rvs/gpdb,xuegang/gpdb,edespino/gpdb,lpetrov-pivotal/gpdb,Quikling/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,lintzc/gpdb,rvs/gpdb,tangp3/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,atris/gpdb,xuegang/gpdb,50wu/gpdb,Chibin/gpdb,foyzur/gpdb,janebeckman/gpdb,yuanzhao/gpdb,zaksoup/gpdb,0x0FFF/gpdb,foyzur/gpdb,rubikloud/gpdb,rubikloud/gpdb,ahachete/gpdb,CraigHarris/gpdb,greenplum-db/gpdb,lintzc/gpdb,yuanzhao/gpdb,rubikloud/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,chrishajas/gpdb,rvs/gpdb,kaknikhil/gpdb,edespino/gpdb,jmcatamney/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,royc1/gpdb,yuanzhao/gpdb,rubikloud/gpdb,yuanzhao/gpdb,0x0FFF/gpdb,rubikloud/gpdb,xinzweb/gpdb,xinzweb/gpdb,CraigHarris/gpdb,xuegang/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,Chibin/gpdb,lintzc/gpdb,janebeckman/gpdb,lintzc/gpdb,ashwinstar/gpdb,adam8157/gpdb,Quikling/gpdb,Chibin/gpdb,foyzur/gpdb,Quikling/gpdb,xuegang/gpdb,chrishajas/gpdb,atris/gpdb,janebeckman/gpdb,cjcjameson/gpdb,Quikling/gpdb,greenplum-db/gpdb,atris/gpdb,ashwinstar/gpdb,xuegang/gpdb,lintzc/gpdb,foyzur/gpdb,adam8157/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,cjcjameson/gpdb,foyzur/gpdb,zaksoup/gpdb,xuegang/gpdb,xinzweb/gpdb,ahachete/gpdb,xuegang/gpdb,royc1/gpdb,CraigHarris/gpdb,lpetrov-pivotal/gpdb,chrishajas/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,lintzc/gpdb,lisakowen/gpdb,adam8157/gpdb,chrishajas/gpdb,royc1/gpdb,rvs/gpdb,randomtask1155/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,lpetrov-pivotal/gpdb,edespino/gpdb,rubikloud/gpdb,rvs/gpdb,janebeckman/gpdb,atris/gpdb,ahachete/gpdb,adam8157/gpdb,jmcatamney/gpdb,50wu/gpdb,rvs/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,rvs/gpdb,cjcjameson/gpdb,janebeckman/gpdb,rvs/gpdb,50wu/gpdb,0x0FFF/gpdb,Quikling/gpdb,lisakowen/gpdb,Quikling/gpdb,ahachete/gpdb,jmcatamney/gpdb,rubikloud/gpdb,ahachete/gpdb,Chibin/gpdb,chrishajas/gpdb,rvs/gpdb,tangp3/gpdb,tangp3/gpdb,royc1/gpdb,adam8157/gpdb,yuanzhao/gpdb,lisakowen/gpdb,CraigHarris/gpdb,chrishajas/gpdb,foyzur/gpdb,lisakowen/gpdb,ahachete/gpdb,lintzc/gpdb,Quikling/gpdb,greenplum-db/gpdb,zaksoup/gpdb,adam8157/gpdb,ashwinstar/gpdb,edespino/gpdb,foyzur/gpdb,0x0FFF/gpdb,janebeckman/gpdb,lisakowen/gpdb,randomtask1155/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,foyzur/gpdb,kaknikhil/gpdb,50wu/gpdb,xuegang/gpdb,royc1/gpdb,randomtask1155/gpdb,ashwinstar/gpdb,edespino/gpdb,zaksoup/gpdb,edespino/gpdb,atris/gpdb,royc1/gpdb,kaknikhil/gpdb,janebeckman/gpdb,royc1/gpdb,tangp3/gpdb,chrishajas/gpdb,randomtask1155/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,randomtask1155/gpdb,0x0FFF/gpdb,kaknikhil/gpdb,Quikling/gpdb,xinzweb/gpdb,cjcjameson/gpdb,0x0FFF/gpdb,xinzweb/gpdb,tangp3/gpdb,zaksoup/gpdb,Chibin/gpdb,atris/gpdb,Chibin/gpdb,lisakowen/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,xinzweb/gpdb,rvs/gpdb,kaknikhil/gpdb,Chibin/gpdb,50wu/gpdb,tangp3/gpdb,adam8157/gpdb,cjcjameson/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,atris/gpdb,ahachete/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,zaksoup/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,xinzweb/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,0x0FFF/gpdb,0x0FFF/gpdb,tangp3/gpdb,Chibin/gpdb,Quikling/gpdb,atris/gpdb,adam8157/gpdb,lintzc/gpdb,edespino/gpdb,lisakowen/gpdb,greenplum-db/gpdb,ahachete/gpdb,Quikling/gpdb,xinzweb/gpdb,xuegang/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,lpetrov-pivotal/gpdb,zaksoup/gpdb,CraigHarris/gpdb,chrishajas/gpdb,royc1/gpdb,Chibin/gpdb,lisakowen/gpdb,janebeckman/gpdb,50wu/gpdb