Log Message:
-----------
Reset cluster_sql on parser entry.
Fixes crash in case CLUSTER 'name'; follows CLUSTER func();
Modified Files:
--------------
plproxy/src:
parser.y (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/parser.y.diff?r1=1.5&r2=1.6)