Hello.
InnoDB does not keep an internal count of rows in a table. (This would
actually be somewhat complicated because of multi-versioning). To process a
SELECT COUNT(*) FROM T statement, InnoDB must scan an index of the table,
which will take some time if the table is not entirely in the
-
From: Julian Legeny [EMAIL PROTECTED]
Newsgroups: mailing.database.myodbc
Sent: Thursday, November 18, 2004 5:22 PM
Subject: Poor performance for executing SELECT COUNT() for 50 000 records
Hello,
I'm using MySQL 4.0.20a.
I have a question about index performance for sql query SELECT COUNT
