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f933766ba7
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.
47 lines
878 B
Plaintext
47 lines
878 B
Plaintext
--
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-- first, define the datatype. Turn off echoing so that expected file
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-- does not depend on contents of seg.sql.
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--
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\set ECHO none
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CREATE TABLE test__int( a int[] );
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\copy test__int from 'data/test__int.data'
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SELECT count(*) from test__int WHERE a && '{23,50}';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @ '{23,50}';
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count
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-------
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12
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(1 row)
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CREATE INDEX text_idx on test__int using gist ( a gist__int_ops );
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SELECT count(*) from test__int WHERE a && '{23,50}';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @ '{23,50}';
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count
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-------
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12
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(1 row)
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drop index text_idx;
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CREATE INDEX text_idx on test__int using gist ( a gist__intbig_ops );
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SELECT count(*) from test__int WHERE a && '{23,50}';
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count
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-------
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403
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(1 row)
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SELECT count(*) from test__int WHERE a @ '{23,50}';
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count
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-------
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12
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(1 row)
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