Use ReadNewTransactionId() for xid_age().
Use ReadNewTransactionId() for xid_age().

GetTopTransactionId() bumps the xid counter, doesn't seem required for this
function. For GPDB this function may be called by QE READER, causing XID
assignment in reader which is a voilation. Hence instead use
ReadNewTransactionId() to just read current value instead of bumping the value.

janebeckman/gpdb,xinzweb/gpdb,ashwinstar/gpdb,xinzweb/gpdb,rvs/gpdb,xinzweb/gpdb,kaknikhil/gpdb,xinzweb/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,50wu/gpdb,kaknikhil/gpdb,lisakowen/gpdb,Quikling/gpdb,adam8157/gpdb,xinzweb/gpdb,jmcatamney/gpdb,Quikling/gpdb,rvs/gpdb,Chibin/gpdb,Quikling/gpdb,adam8157/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,cjcjameson/gpdb,janebeckman/gpdb,jmcatamney/gpdb,edespino/gpdb,yuanzhao/gpdb,janebeckman/gpdb,jmcatamney/gpdb,edespino/gpdb,rvs/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,janebeckman/gpdb,edespino/gpdb,ashwinstar/gpdb,rvs/gpdb,greenplum-db/gpdb,rvs/gpdb,yuanzhao/gpdb,edespino/gpdb,kaknikhil/gpdb,lisakowen/gpdb,greenplum-db/gpdb,janebeckman/gpdb,edespino/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,50wu/gpdb,ashwinstar/gpdb,adam8157/gpdb,rvs/gpdb,Quikling/gpdb,adam8157/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,janebeckman/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,Quikling/gpdb,50wu/gpdb,adam8157/gpdb,cjcjameson/gpdb,rvs/gpdb,lisakowen/gpdb,ashwinstar/gpdb,janebeckman/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,edespino/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,xinzweb/gpdb,50wu/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,Chibin/gpdb,xinzweb/gpdb,50wu/gpdb,kaknikhil/gpdb,janebeckman/gpdb,Quikling/gpdb,yuanzhao/gpdb,adam8157/gpdb,lisakowen/gpdb,Chibin/gpdb,edespino/gpdb,Quikling/gpdb,Chibin/gpdb,50wu/gpdb,lisakowen/gpdb,rvs/gpdb,Quikling/gpdb,kaknikhil/gpdb,Chibin/gpdb,lisakowen/gpdb,Chibin/gpdb,Quikling/gpdb,kaknikhil/gpdb,Chibin/gpdb,cjcjameson/gpdb,lisakowen/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,adam8157/gpdb,rvs/gpdb,rvs/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,50wu/gpdb,kaknikhil/gpdb,janebeckman/gpdb,50wu/gpdb,ashwinstar/gpdb,edespino/gpdb,cjcjameson/gpdb,edespino/gpdb,kaknikhil/gpdb,adam8157/gpdb,janebeckman/gpdb,edespino/gpdb,lisakowen/gpdb,Chibin/gpdb,Chibin/gpdb,xinzweb/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,Chibin/gpdb,Quikling/gpdb