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9ee014fc89
Module provides new access method. It is actually a simple Bloom filter implemented as pgsql's index. It could give some benefits on search with large number of columns. Module is a single way to test generic WAL interface committed earlier. Author: Teodor Sigaev, Alexander Korotkov Reviewers: Aleksander Alekseev, Michael Paquier, Jim Nasby
20 lines
442 B
SQL
20 lines
442 B
SQL
CREATE OR REPLACE FUNCTION blhandler(internal)
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RETURNS index_am_handler
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AS 'MODULE_PATHNAME'
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LANGUAGE C;
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-- Access method
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CREATE ACCESS METHOD bloom TYPE INDEX HANDLER blhandler;
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-- Opclasses
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CREATE OPERATOR CLASS int4_ops
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DEFAULT FOR TYPE int4 USING bloom AS
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OPERATOR 1 =(int4, int4),
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FUNCTION 1 hashint4(int4);
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CREATE OPERATOR CLASS text_ops
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DEFAULT FOR TYPE text USING bloom AS
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OPERATOR 1 =(text, text),
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FUNCTION 1 hashtext(text);
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