database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-31 22:04:40 +03:00
Code Activity

Restructure pg_opclass, pg_amop, and pg_amproc per previous discussions in

Browse Source 
pgsql-hackers.  pg_opclass now has a row for each opclass supported by each
index AM, not a row for each opclass name.  This allows pg_opclass to show
directly whether an AM supports an opclass, and furthermore makes it possible
to store additional information about an opclass that might be AM-dependent.
pg_opclass and pg_amop now store "lossy" and "haskeytype" information that we
previously expected the user to remember to provide in CREATE INDEX commands.
Lossiness is no longer an index-level property, but is associated with the
use of a particular operator in a particular index opclass.

Along the way, IndexSupportInitialize now uses the syscaches to retrieve
pg_amop and pg_amproc entries.  I find this reduces backend launch time by
about ten percent, at the cost of a couple more special cases in catcache.c's
IndexScanOK.

Initial work by Oleg Bartunov and Teodor Sigaev, further hacking by Tom Lane.

initdb forced.
This commit is contained in:
Tom Lane
2001-08-21 16:36:06 +00:00
parent c2d1566912
commit f933766ba7
60 changed files with 1918 additions and 1929 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
contrib/findoidjoins/README.findoidjoins
View File

@ -48,10 +48,8 @@ Join pg_am.amrestrpos => pg_proc.oid
Join pg_am.ambuild => pg_proc.oid
Join pg_am.ambulkdelete => pg_proc.oid
Join pg_am.amcostestimate => pg_proc.oid
Join pg_amop.amopid => pg_am.oid
Join pg_amop.amopclaid => pg_opclass.oid
Join pg_amop.amopopr => pg_operator.oid
Join pg_amproc.amid => pg_am.oid
Join pg_amproc.amopclaid => pg_opclass.oid
Join pg_amproc.amproc => pg_proc.oid
Join pg_attribute.attrelid => pg_class.oid
@ -63,7 +61,8 @@ Join pg_class.reltoastidxid => pg_class.oid
Join pg_description.classoid => pg_class.oid
Join pg_index.indexrelid => pg_class.oid
Join pg_index.indrelid => pg_class.oid
Join pg_opclass.opcdeftype => pg_type.oid
Join pg_opclass.opcamid => pg_am.oid
Join pg_opclass.opcintype => pg_type.oid
Join pg_operator.oprleft => pg_type.oid
Join pg_operator.oprright => pg_type.oid
Join pg_operator.oprresult => pg_type.oid

12
contrib/findoidjoins/findoidjoins.c
View File

@ -68,15 +68,17 @@ main(int argc, char **argv)
if (strcmp(typname, "oid") == 0)
sprintf(query, "\
DECLARE c_matches BINARY CURSOR FOR \
SELECT count(*) \
SELECT count(*)::int4 \
FROM \"%s\" t1, \"%s\" t2 \
WHERE t1.\"%s\" = t2.oid ", relname, relname2, attname);
WHERE t1.\"%s\" = t2.oid ",
relname, relname2, attname);
else
sprintf(query, "\
DECLARE c_matches BINARY CURSOR FOR \
SELECT count(*) \
FROM \"%s\" t1, \"%s\" t2 \
WHERE RegprocToOid(t1.\"%s\") = t2.oid ", relname, relname2, attname);
SELECT count(*)::int4 \
FROM \"%s\" t1, \"%s\" t2 \
WHERE RegprocToOid(t1.\"%s\") = t2.oid ",
relname, relname2, attname);
doquery(query);
doquery("FETCH ALL IN c_matches");