40 lines
1.3 KiB
SQL
40 lines
1.3 KiB
SQL
-- This script enables use of the new LIKE-related selectivity estimation
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-- functions, which are a little too new to be enabled by default in 7.0.
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-- You can disable them again by running disablelike.sql.
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-- Use of the functions will be enabled only in those databases you
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-- run this script in. If you run it in template1,
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-- all subsequently-created databases will use the functions.
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-- Be sure to run the script as the Postgres superuser!
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UPDATE pg_operator SET
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oprrest = 'regexeqsel'::regproc,
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oprjoin = 'regexeqjoinsel'::regproc
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WHERE oprrest = 'eqsel'::regproc AND oprname = '~';
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UPDATE pg_operator SET
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oprrest = 'icregexeqsel'::regproc,
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oprjoin = 'icregexeqjoinsel'::regproc
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WHERE oprrest = 'eqsel'::regproc AND oprname = '~*';
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UPDATE pg_operator SET
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oprrest = 'likesel'::regproc,
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oprjoin = 'likejoinsel'::regproc
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WHERE oprrest = 'eqsel'::regproc AND oprname = '~~';
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UPDATE pg_operator SET
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oprrest = 'regexnesel'::regproc,
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oprjoin = 'regexnejoinsel'::regproc
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WHERE oprrest = 'neqsel'::regproc AND oprname = '!~';
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UPDATE pg_operator SET
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oprrest = 'icregexnesel'::regproc,
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oprjoin = 'icregexnejoinsel'::regproc
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WHERE oprrest = 'neqsel'::regproc AND oprname = '!~*';
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UPDATE pg_operator SET
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oprrest = 'nlikesel'::regproc,
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oprjoin = 'nlikejoinsel'::regproc
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WHERE oprrest = 'neqsel'::regproc AND oprname = '!~~';
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