Add GIN support for pg_trgm. From Guillaume Smet <guillaume.smet@gmail.com>

with minor editorization by me.

Author: feodor

contrib/pg_trgm/Makefile

@@ -1,7 +1,7 @@
-# $PostgreSQL: pgsql/contrib/pg_trgm/Makefile,v 1.6 2007/02/09 17:24:33 petere Exp $
+# $PostgreSQL: pgsql/contrib/pg_trgm/Makefile,v 1.7 2007/03/14 14:15:40 teodor Exp $
 
 MODULE_big = pg_trgm
-OBJS = trgm_op.o trgm_gist.o 
+OBJS = trgm_op.o trgm_gist.o trgm_gin.o
 
 DATA_built = pg_trgm.sql
 DATA = uninstall_pg_trgm.sql

contrib/pg_trgm/README.pg_trgm

@@ -113,6 +113,8 @@ Tsearch2 Integration
 	Next, create a trigram index on the word column:
 
 	CREATE INDEX words_idx ON words USING gist(word gist_trgm_ops);
+	or
+	CREATE INDEX words_idx ON words USING gin(word gist_trgm_ops);
 
 	Now, a SELECT query similar to the example above can be used to
 	suggest spellings for misspelled words in user search terms. A