1- $PostgreSQL: pgsql/src/backend/access/gin/README,v 1.5 2008/03/20 17:55:14 momjian Exp $
1+ $PostgreSQL: pgsql/src/backend/access/gin/README,v 1.6 2008/07/08 03:25:42 neilc Exp $
22
33Gin for PostgreSQL
44==================
@@ -25,8 +25,8 @@ for tsvector) and where each tuple in a leaf page is either a pointer to a
2525B-tree over item pointers (PT, posting tree), or a list of item pointers
2626(PL, posting list) if the tuple is small enough.
2727
28- Note: There is no delete operation for ET. The reason for this is thatfrom
29- our experience,a set ofunique wordsover a largecollection change very
28+ Note: There is no delete operation for ET. The reason for this is thatin
29+ our experience,the set ofdistinct wordsin a largecorpus changes very
3030rarely. This greatly simplifies the code and concurrency algorithms.
3131
3232Gin comes with built-in support for one-dimensional arrays (eg. integer[],
@@ -64,7 +64,7 @@ itself is very fast.)
6464
6565Such queries usually contain very frequent lexemes, so the results are not
6666very helpful. To facilitate execution of such queries Gin has a configurable
67- soft upper limitof the size of the returned set, determined by the
67+ soft upper limiton the size of the returned set, determined by the
6868'gin_fuzzy_search_limit' GUC variable. This is set to 0 by default (no
6969limit).
7070
