Use faster PQExpBuffer operations where possible
Use faster PQExpBuffer operations where possible

appendPQExpBuffer() is a variadic function which interprets the
second parameter as a printf format string. Where we just append
a static string, use appendPQExpBufferStr() instead which is much
faster. Where a single char is added, use appendPQExpBufferChar().

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