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are now separate files "postgres.h" and "postgres_fe.h", which are meant to be the primary include files for backend .c files and frontend .c files respectively. By default, only include files meant for frontend use are installed into the installation include directory. There is a new make target 'make install-all-headers' that adds the whole content of the src/include tree to the installed fileset, for use by people who want to develop server-side code without keeping the complete source tree on hand. Cleaned up a whole lot of crufty and inconsistent header inclusions. |
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bench | ||
data | ||
expected | ||
sql | ||
_int.c | ||
_int.sql.in | ||
Makefile | ||
README.intarray |
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. 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. INSTALLATION: gmake gmake install -- load functions psql <database> < _int.sql REGRESSION TEST: gmake installcheck EXAMPLE USAGE: create table message (mid int not null,sections int[]); create table message_section_map (mid int not null,sid int not null); -- 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 ); -- select some messages with section in 1 OR 2 - OVERLAP operator select message.mid from message where message.sections && '{1,2}'; -- select messages contains in sections 1 AND 2 - CONTAINS operator select message.mid from message where message.sections @ '{1,2}'; -- the same, CONTAINED operator select message.mid from message where '{1,2}' ~ message.sections; BENCHMARK: subdirectory bench contains benchmark suite. cd ./bench 1. createdb TEST 2. psql TEST < ../_int.sql 3. ./create_test.pl | psql TEST 4. ./bench.pl - perl script to benchmark queries, supports OR, AND queries with/without RD-Tree. Run script without arguments to see availbale options. a)test without RD-Tree (OR) ./bench.pl -d TEST -s 1,2 -v b)test with RD-Tree ./bench.pl -d TEST -s 1,2 -v -r BENCHMARKS: Size of table <message>: 200000 Size of table <message_section_map>: 268538 Distribution of messages by sections: section 0: 73899 messages section 1: 16298 messages section 50: 1241 messages section 99: 705 messages old - without RD-Tree support, new - with RD-Tree +----------+---------------+----------------+ |Search set|OR, time in sec|AND, time in sec| | +-------+-------+--------+-------+ | | old | new | old | new | +----------+-------+-------+--------+-------+ | 1| 1.427| 0.215| -| -| +----------+-------+-------+--------+-------+ | 99| 1.029| 0.018| -| -| +----------+-------+-------+--------+-------+ | 1,2| 1.829| 0.334| 5.654| 0.042| +----------+-------+-------+--------+-------+ | 1,2,50,60| 2.057| 0.359| 5.044| 0.007| +----------+-------+-------+--------+-------+