X-Git-Url: http://www.sigaev.ru/git/gitweb.cgi?p=plantuner.git;a=blobdiff_plain;f=README.plantuner;h=6b16fbab11b5ae81a92301c2d8ba4066a5e56bae;hp=49141c0d932921abe797de2b39640e3986cac3be;hb=7a05bfc851d3739b4b47871b65e868760212a850;hpb=a07b2ca58b6804b8a261e674a159eb442362471a

diff --git a/README.plantuner b/README.plantuner
index 49141c0..6b16fba 100644
--- a/README.plantuner
+++ b/README.plantuner
@@ -24,7 +24,7 @@ Motivation
    use specific index.
 
    Next, for some workload PostgreSQL could be too pessimistic for
-   newly created tables and assumps much more rows in table than
+   newly created tables and assumes much more rows in table than
    it actually has. If plantuner.fix_empty_table GUC variable is set
    to true then module will set to zero number of pages/tuples of
    table which hasn't blocks in file.
@@ -34,6 +34,14 @@ Installation
      * Get latest source of plantuner from CVS Repository
      * gmake && gmake install && gmake installcheck
 
+Syntax
+	plantuner.forbid_index (deprecated)
+	plantuner.disable_index
+		List of indexes invisible to planner
+	plantuner.enable_index
+		List of indexes visible to planner even they are hided
+		by plantuner.disable_index. 
+
 Usage
 
    To enable the module you can either load shared library 'plantuner' in
@@ -60,7 +68,7 @@ Indexes:
          Index Cond: (id = 1)
 (4 rows)
 =# set enable_seqscan=off;
-=# set plantuner.forbid_index='id_idx2';
+=# set plantuner.disable_index='id_idx2';
 =# explain select id from test where id=1;
                               QUERY PLAN
 ----------------------------------------------------------------------
@@ -69,10 +77,20 @@ Indexes:
    ->  Bitmap Index Scan on id_idx  (cost=0.00..4.34 rows=12 width=0)
          Index Cond: (id = 1)
 (4 rows)
-=# set plantuner.forbid_index='id_idx2,id_idx';
+=# set plantuner.disable_index='id_idx2,id_idx';
 =# explain select id from test where id=1;
                                QUERY PLAN
 -------------------------------------------------------------------------
  Seq Scan on test  (cost=10000000000.00..10000000040.00 rows=12 width=4)
    Filter: (id = 1)
 (2 rows)
+=# set plantuner.enable_index='id_idx';
+=# explain select id from test where id=1;
+                              QUERY PLAN
+-----------------------------------------------------------------------
+ Bitmap Heap Scan on test  (cost=4.34..15.03 rows=12 width=4)
+   Recheck Cond: (id = 1)
+   ->  Bitmap Index Scan on id_idx  (cost=0.00..4.34 rows=12 width=0)
+         Index Cond: (id = 1)
+(4 rows)
+