pgsql: Make SP-GiST redirect cleanup more aggressive.

Make SP-GiST redirect cleanup more aggressive.

Commit 61b313e4 made VACUUM pass down a heaprel to index AM bulkdelete
and vacuumcleanup routines. Although this was primarily intended as
preparation for logical decoding on standbys, it also made it easy to
correct an old deficiency in how we determine how to cleanup SP-GiST
redirect and placeholder tuples.

Pass the heaprel to GlobalVisTestFor() during cleanup of redirect and
placeholder tuples, rather than pessimistically passing NULL.

Author: Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>
Discussion: https://postgr.es/m/02392033-f030-a3c8-c7d0-5c27eb529fec@gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/05a304a855104a8eb6394e044bfbc8e761a4d635

Modified Files
--------------
src/backend/access/spgist/spgvacuum.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)