add gin_count_estimate() for tsvector index

[gevel.git] / README.gevel

diff --git a/README.gevel b/README.gevel
index c3fbf2a..21230c1 100644 (file)
--- a/README.gevel
+++ b/README.gevel
@@ -134,3 +134,12 @@ 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)
+