mirror of
https://github.com/postgres/postgres.git
synced 2025-07-28 23:42:10 +03:00
Update FAQ.
This commit is contained in:
6
doc/FAQ
6
doc/FAQ
@ -1,7 +1,7 @@
|
||||
|
||||
Frequently Asked Questions (FAQ) for PostgreSQL
|
||||
|
||||
Last updated: Wed May 30 18:57:52 EDT 2001
|
||||
Last updated: Wed May 30 19:00:33 EDT 2001
|
||||
|
||||
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
|
||||
|
||||
@ -709,9 +709,9 @@ Maximum number of indexes on a table? unlimited
|
||||
column statistics on its own, so VACUUM ANALYZE must be run to collect
|
||||
them periodically.
|
||||
|
||||
Indexes are usually not used for ORDER BY or joins: a sequential scan
|
||||
Indexes are usually not used for ORDER BY or joins. A sequential scan
|
||||
followed by an explicit sort is faster than an indexscan of all tuples
|
||||
of a large table, because it takes fewer disk accesses.
|
||||
of a large table. This is because random disk access is very slow.
|
||||
|
||||
When using wild-card operators such as LIKE or ~, indices can only be
|
||||
used if the beginning of the search is anchored to the start of the
|
||||
|
Reference in New Issue
Block a user