Log Message:
-----------
Add a CHECK_FOR_INTERRUPTS() in _bt_buildadd(). This fixes problem
with not responding to query cancel during the last stage of btree index
creation.
Modified Files:
--------------
pgsql/src/backend/access/nbtree:
nbtsort.c (r1.99 -> r1.100)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/nbtree/nbtsort.c.diff?r1=1.99&r2=1.100)