diff --git a/doc/FAQ b/doc/FAQ
index b09bf2abc37..b44997cd16a 100644
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -1,7 +1,7 @@
Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Sun Feb 12 12:15:49 EST 2006
+ Last updated: Fri Feb 24 09:59:35 EST 2006
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -569,14 +569,8 @@
sequential scan followed by an explicit sort is usually faster than an
index scan of a large table.
However, LIMIT combined with ORDER BY often will use an index because
- only a small portion of the table is returned. In fact, though MAX()
- and MIN() don't use indexes, it is possible to retrieve such values
- using an index with ORDER BY and LIMIT:
- SELECT col
- FROM tab
- ORDER BY col [ DESC ]
- LIMIT 1;
-
+ only a small portion of the table is returned.
+
If you believe the optimizer is incorrect in choosing a sequential
scan, use SET enable_seqscan TO 'off' and run query again to see if an
index scan is indeed faster.
diff --git a/doc/FAQ_AIX b/doc/FAQ_AIX
index ff6bcdb32ee..131b38231ff 100644
--- a/doc/FAQ_AIX
+++ b/doc/FAQ_AIX
@@ -1,5 +1,5 @@
From: Zeugswetter Andreas Last updated: Sun Feb 12 12:15:49 EST 2006 Last updated: Fri Feb 24 09:59:35 EST 2006 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -742,16 +742,8 @@ table?Frequently Asked Questions (FAQ) for PostgreSQL
- unlimited
usually faster than an index scan of a large table.
- SELECT col - FROM tab - ORDER BY col [ DESC ] - LIMIT 1; -- + is returned. +
If you believe the optimizer is incorrect in choosing a
sequential scan, use SET enable_seqscan TO 'off'
and
run query again to see if an index scan is indeed faster.