Michael Stassen napsal(a):
Is this really your query? The LEFT JOINed tables, editor, customer,
product, brand, calendar, and partner do not contribute to the output
(i.e. none of their columns are selected), nor are they used to
determine which rows to consider (i.e. they don't appear in the W
Pavel Novak wrote:
Hello,
I am clueless of this query, becaouse it's very slow - between 30 and
60 seconds:
mysql> SELECT DISTINCT o.id AS id, o.orderid AS orderid, o.serialid AS
serialid
-> FROM orders o
-> LEFT JOIN editor e1 ON o.createdby = e1.id
-> LEFT JOIN editor e2 ON o.changed
Pavel Novák wrote:
yea, but I use a lot of indexes and I don't know how to set it better.
Bellow there are create table info so could you tell me what do you
think would be bad, please?
To begin with, you have redundant indexes. Unnecessary indexes slow you
down.
CREATE TABLE `order_acl` (
`ob
Jigal van Hemert napsal(a):
| 1 | SIMPLE | o | ALL| NULL | NULL|
NULL | NULL| 20402 | Using temporary; Using
filesort |
Well, this is a clue IMHO... no suitable indexes in o could be found
to use
in this query...
yea, but I use a lot of indexes a
From: "Pavel Novak"
> | 1 | SIMPLE | o | ALL| NULL | NULL|NULL
> | NULL| 20402 | Using temporary; Using filesort |
Well, this is a clue IMHO... no suitable indexes in o could be found to use
in this query...
Since you use a lot of columns fro
