Allow hash joins to be interrupted while searching hash table for match.
Allow hash joins to be interrupted while searching hash table for match.

Per experimentation with a recent example, in which unreasonable amounts
of time could elapse before the backend would respond to a query-cancel.

This might be something to back-patch, but the patch doesn't apply cleanly
because this code was rewritten for 9.1.  Given the lack of field
complaints I won't bother for now.

Cédric Villemain

lisakowen/gpdb,greenplum-db/gpdb,kmjungersen/PostgresXL,oberstet/postgres-xl,yazun/postgres-xl,xinzweb/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,kmjungersen/PostgresXL,jmcatamney/gpdb,yazun/postgres-xl,50wu/gpdb,ovr/postgres-xl,snaga/postgres-xl,oberstet/postgres-xl,Postgres-XL/Postgres-XL,ovr/postgres-xl,50wu/gpdb,postmind-net/postgres-xl,techdragon/Postgres-XL,xinzweb/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,greenplum-db/gpdb,kmjungersen/PostgresXL,postmind-net/postgres-xl,adam8157/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,50wu/gpdb,lisakowen/gpdb,kmjungersen/PostgresXL,yazun/postgres-xl,arcivanov/postgres-xl,yazun/postgres-xl,adam8157/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,xinzweb/gpdb,ashwinstar/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,greenplum-db/gpdb,xinzweb/gpdb,50wu/gpdb,lisakowen/gpdb,tpostgres-projects/tPostgres,Postgres-XL/Postgres-XL,snaga/postgres-xl,50wu/gpdb,jmcatamney/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,tpostgres-projects/tPostgres,pavanvd/postgres-xl,postmind-net/postgres-xl,zeroae/postgres-xl,jmcatamney/gpdb,ovr/postgres-xl,snaga/postgres-xl,oberstet/postgres-xl,ashwinstar/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl,adam8157/gpdb,adam8157/gpdb,lisakowen/gpdb,50wu/gpdb,adam8157/gpdb,ovr/postgres-xl,oberstet/postgres-xl,jmcatamney/gpdb,50wu/gpdb,zeroae/postgres-xl,kmjungersen/PostgresXL,yazun/postgres-xl,ovr/postgres-xl,oberstet/postgres-xl,50wu/gpdb,greenplum-db/gpdb,xinzweb/gpdb,jmcatamney/gpdb,zeroae/postgres-xl,postmind-net/postgres-xl,ashwinstar/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,arcivanov/postgres-xl,adam8157/gpdb,ashwinstar/gpdb,arcivanov/postgres-xl,lisakowen/gpdb,adam8157/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,adam8157/gpdb,xinzweb/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,techdragon/Postgres-XL,tpostgres-projects/tPostgres,snaga/postgres-xl,ashwinstar/gpdb,snaga/postgres-xl,greenplum-db/gpdb,Postgres-XL/Postgres-XL,arcivanov/postgres-xl,lisakowen/gpdb