support for 9.1

[gevel.git] / README.gevel

diff --git a/README.gevel b/README.gevel
index c3fbf2a..4d7c2a5 100644 (file)
--- a/README.gevel
+++ b/README.gevel
@@ -124,6 +124,9 @@ regression=# select gist_tree('pix');
 (29 rows)
 
    * gin_stat(INDEXNAME) prints estimated counts for each indexed values
+        Note: since 8.4 gin_stat function has gin_stat(INDEXNAME, COLNUMBER) 
+        prototype, single-argument function will return result for a first
+        column of index
 
 # SELECT * FROM gin_stat('gin_idx') as t(value int, nrow int) where nrow > 250;
  value | nrow 
@@ -134,3 +137,12 @@ regression=# select gist_tree('pix');
        59 |  259
  (4 rows)
 
+   * bigint gin_count_estimate(INDEXNAME, TSQUERY) outputs number of indexed
+        rows matched query. It doesn't touch heap at all.
+
+# select gin_count_estimate('qq', 'star');
+ gin_count_estimate 
+--------------------
+                                790
+(1 row)
+