Fix pageinspect failures on hash indexes.
Make every page in a hash index which isn't all-zeroes have a valid
special space, so that tools like pageinspect don't error out.
Also, make pageinspect cope with all-zeroes pages, because
_hash_alloc_buckets can leave behind large numbers of those until
they're consumed by splits.
Ashutosh Sharma and Robert Haas, reviewed by Amit Kapila.
Original trouble report from Jeff Janes.
Discussion: http://postgr.es/m/CAMkU=1y6NjKmqbJ8wLMhr=F74WzcMALYWcVFhEpm7i=mV=XsOg@mail.gmail.com
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/633e15ea0f1bf2e1d70441fe9da8781befebd6e9
Modified Files
--------------
contrib/pageinspect/hashfuncs.c | 70 +++++++++++++++++++++----------------
src/backend/access/hash/hash_xlog.c | 9 +++++
src/backend/access/hash/hashovfl.c | 17 +++++++--
src/backend/access/hash/hashpage.c | 12 ++++++-
4 files changed, 73 insertions(+), 35 deletions(-)