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Update contrib intarray to Jan 25 version.

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Bruce Momjian
2001-03-17 21:59:42 +00:00
parent 5a38af7fd8
commit 4bcb80a3e3
7 changed files with 816 additions and 266 deletions
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contrib/intarray/README.intarray
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@ -1,7 +1,11 @@
This is an implementation of RD-tree data structure using GiST interface
of PostgreSQL. It has built-in lossy compression - must be declared
in index creation - with (islossy). Current implementation has index support
for one-dimensional array of int4's.
in index creation - with (islossy). Current implementation provides index
support for one-dimensional array of int4's - gist__int_ops, suitable for
small and medium size of arrays (used on default), and gist__intbig_ops for
indexing large arrays (we use superimposed signature with length of 4096
bits to represent sets).
All work was done by Teodor Sigaev (teodor@stack.net) and Oleg Bartunov
(oleg@sai.msu.su). See http://www.sai.msu.su/~megera/postgres/gist
for additional information.
@ -25,7 +29,7 @@ EXAMPLE USAGE:
-- create indices
CREATE unique index message_key on message ( mid );
CREATE unique index message_section_map_key2 on message_section_map (sid, mid );
CREATE INDEX message_rdtree_idx on message using gist ( sections ) with ( islossy );
CREATE INDEX message_rdtree_idx on message using gist ( sections gist__int_ops) with ( islossy );
-- select some messages with section in 1 OR 2 - OVERLAP operator
select message.mid from message where message.sections && '{1,2}';