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| author | Bruce Momjian <bruce@momjian.us> | 2002-06-25 01:45:58 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2002-06-25 01:45:58 +0000 |
| commit | 0b584830f0efef400ef26da58e5c17f14cece3e7 (patch) | |
| tree | ee4148746fac76beaceb33422e17c9b210fa619c | |
| parent | 6918df16a5483600fb0466b96f813ed5b6927fd8 (diff) | |
| download | postgresql-0b584830f0efef400ef26da58e5c17f14cece3e7.tar.gz postgresql-0b584830f0efef400ef26da58e5c17f14cece3e7.zip | |
Update FAQ.
| -rw-r--r-- | doc/FAQ | 11 | ||||
| -rw-r--r-- | doc/src/FAQ/FAQ.html | 7 |
2 files changed, 10 insertions, 8 deletions
@@ -1,7 +1,7 @@ Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Sun Jun 23 17:16:13 EDT 2002 + Last updated: Mon Jun 24 21:45:50 EDT 2002 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -743,13 +743,14 @@ using an index with ORDER BY and LIMIT: SELECT col FROM tab - ORDER BY col + ORDER BY col [ DESC ] LIMIT 1 When using wild-card operators such as LIKE or ~, indexes can only be - used if the beginning of the search is anchored to the start of the - string. Therefore, to use indexes, LIKE patterns must not start with - %, and ~(regular expression) patterns must start with ^. + used if the default C local is used during initdb and the beginning of + the search is anchored to the start of the string. Therefore, to use + indexes, LIKE patterns must not start with %, and ~(regular + expression) patterns must start with ^. 4.9) How do I see how the query optimizer is evaluating my query? diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html index b6de1a6d499..3240a406850 100644 --- a/doc/src/FAQ/FAQ.html +++ b/doc/src/FAQ/FAQ.html @@ -14,7 +14,7 @@ alink="#0000ff"> <H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1> - <P>Last updated: Sun Jun 23 17:16:13 EDT 2002</P> + <P>Last updated: Mon Jun 24 21:45:50 EDT 2002</P> <P>Current maintainer: Bruce Momjian (<A href= "mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR> @@ -946,12 +946,13 @@ <PRE> SELECT col FROM tab - ORDER BY col + ORDER BY col [ DESC ] LIMIT 1 </PRE> <P>When using wild-card operators such as <SMALL>LIKE</SMALL> or - <I>~</I>, indexes can only be used if the beginning of the search + <I>~</I>, indexes can only be used if the default C local is used +during initdb and the beginning of the search is anchored to the start of the string. Therefore, to use indexes, <SMALL>LIKE</SMALL> patterns must not start with <I>%</I>, and <I>~</I>(regular expression) patterns must start with <I>^</I>.</P> |