Обсуждение: pgsql: Fix vacuum so that autovacuum is really not cancelled when doing

Log Message:
-----------
Fix vacuum so that autovacuum is really not cancelled when doing an emergency
job (i.e. to prevent Xid wraparound problems.)  Bug reported by ITAGAKI
Takahiro in 20080314103837.63D3.52131E4D@oss.ntt.co.jp, though I didn't use his
patch.

Modified Files:
--------------
    pgsql/src/backend/commands:
        vacuum.c (r1.366 -> r1.367)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/vacuum.c?r1=1.366&r2=1.367)
    pgsql/src/backend/postmaster:
        autovacuum.c (r1.72 -> r1.73)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c?r1=1.72&r2=1.73)
    pgsql/src/backend/tcop:
        utility.c (r1.289 -> r1.290)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/utility.c?r1=1.289&r2=1.290)
    pgsql/src/include/commands:
        vacuum.h (r1.75 -> r1.76)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/vacuum.h?r1=1.75&r2=1.76)