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authorNeil Conway <neilc@samurai.com>2008-07-08 03:25:42 +0000
committerNeil Conway <neilc@samurai.com>2008-07-08 03:25:42 +0000
commit68af3752de444170373dbe4e2116434a3568969d (patch)
tree79b36f98a2eb21b63bb570d0fef340ff878a4319
parent70d15a51b26c34faf5b1ef9e65327554e11b5cc4 (diff)
downloadpostgresql-68af3752de444170373dbe4e2116434a3568969d.tar.gz
postgresql-68af3752de444170373dbe4e2116434a3568969d.zip
Minor improvements to the Gin internal documentation.
-rw-r--r--src/backend/access/gin/README8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/access/gin/README b/src/backend/access/gin/README
index cc3856f9a87..af65efcb542 100644
--- a/src/backend/access/gin/README
+++ b/src/backend/access/gin/README
@@ -1,4 +1,4 @@
-$PostgreSQL: pgsql/src/backend/access/gin/README,v 1.5 2008/03/20 17:55:14 momjian Exp $
+$PostgreSQL: pgsql/src/backend/access/gin/README,v 1.6 2008/07/08 03:25:42 neilc Exp $
Gin for PostgreSQL
==================
@@ -25,8 +25,8 @@ for tsvector) and where each tuple in a leaf page is either a pointer to a
B-tree over item pointers (PT, posting tree), or a list of item pointers
(PL, posting list) if the tuple is small enough.
-Note: There is no delete operation for ET. The reason for this is that from
-our experience, a set of unique words over a large collection change very
+Note: There is no delete operation for ET. The reason for this is that in
+our experience, the set of distinct words in a large corpus changes very
rarely. This greatly simplifies the code and concurrency algorithms.
Gin comes with built-in support for one-dimensional arrays (eg. integer[],
@@ -64,7 +64,7 @@ itself is very fast.)
Such queries usually contain very frequent lexemes, so the results are not
very helpful. To facilitate execution of such queries Gin has a configurable
-soft upper limit of the size of the returned set, determined by the
+soft upper limit on the size of the returned set, determined by the
'gin_fuzzy_search_limit' GUC variable. This is set to 0 by default (no
limit).