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Restructure pg_opclass, pg_amop, and pg_amproc per previous discussions in

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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
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4
contrib/intarray/expected/_int.out
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@ -17,7 +17,7 @@ SELECT count(*) from test__int WHERE a @ '{23,50}';
12
(1 row)
CREATE INDEX text_idx on test__int using gist ( a gist__int_ops ) with ( islossy );
CREATE INDEX text_idx on test__int using gist ( a gist__int_ops );
SELECT count(*) from test__int WHERE a && '{23,50}';
count
-------
@ -31,7 +31,7 @@ SELECT count(*) from test__int WHERE a @ '{23,50}';
(1 row)
drop index text_idx;
CREATE INDEX text_idx on test__int using gist ( a gist__intbig_ops ) with ( islossy );
CREATE INDEX text_idx on test__int using gist ( a gist__intbig_ops );
SELECT count(*) from test__int WHERE a && '{23,50}';
count
-------