Can anyone help me ?
Begin forwarded message:
> From: Tompkins Neil <neil.tompk...@googlemail.com>
> Date: 30 September 2011 20:23:47 GMT+01:00
> To: mark carson <mcar...@pixie.co.za>
> Cc: "[MySQL]" <mysql@lists.mysql.com>
> Subject: Re: Slow query - please help
>
> I downloaded version mysql-5.6.2-m5-win32.msi and he table definitions are
> below, let me know if you need any more information.
>
> CREATE TABLE `districts` (
> `district_id` int(11) NOT NULL,
> `language_code` char(2) COLLATE utf8_unicode_ci NOT NULL DEFAULT 'en',
> `city_id` int(11) DEFAULT NULL,
> `country_code` char(2) COLLATE utf8_unicode_ci DEFAULT NULL,
> `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
> `latitude` double DEFAULT NULL,
> `longitude` double DEFAULT NULL,
> `meta_title` varchar(70) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_keywords` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_description` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `link_text` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `folder_url` varchar(55) COLLATE utf8_unicode_ci DEFAULT NULL,
> `enabled` enum('Y','N') COLLATE utf8_unicode_ci NOT NULL DEFAULT 'N',
> `last_changed` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
> PRIMARY KEY (`district_id`,`language_code`),
> UNIQUE KEY `UNQ_folder_url` (`folder_url`),
> KEY `IDX_country_code` (`country_code`),
> KEY `IDX_enabled` (`enabled`),
> KEY `IDX_folder_url` (`folder_url`),
> KEY `IDX_language_code` (`language_code`),
> KEY `IDX_latitude` (`latitude`),
> KEY `IDX_longitude` (`longitude`)
> ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
>
> CREATE TABLE `cities` (
> `city_id` int(11) NOT NULL,
> `language_code` char(2) COLLATE utf8_unicode_ci NOT NULL,
> `country_code` char(2) COLLATE utf8_unicode_ci DEFAULT NULL,
> `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
> `nr_hotels` int(11) DEFAULT NULL,
> `latitude` double DEFAULT NULL,
> `longitude` double DEFAULT NULL,
> `meta_title` varchar(70) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_keywords` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_description` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `link_text` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `folder_url` varchar(55) COLLATE utf8_unicode_ci DEFAULT NULL,
> `enabled` enum('Y','N') COLLATE utf8_unicode_ci NOT NULL DEFAULT 'N',
> `last_changed` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
> PRIMARY KEY (`city_id`,`language_code`),
> UNIQUE KEY `UNQ_folder_url` (`folder_url`),
> KEY `IDX_country_code` (`country_code`),
> KEY `IDX_enabled` (`enabled`),
> KEY `IDX_folder_url` (`folder_url`),
> KEY `IDX_language_code` (`language_code`),
> KEY `IDX_latitude` (`latitude`),
> KEY `IDX_longitude` (`longitude`)
> ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
>
>
> CREATE TABLE `hotels` (
> `hotel_id` int(11) NOT NULL,
> `language_code` char(2) COLLATE utf8_unicode_ci NOT NULL DEFAULT 'en',
> `address` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
> `city` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
> `city_id` int(11) DEFAULT NULL,
> `class_is_estimated` tinyint(4) DEFAULT NULL,
> `class` tinyint(4) DEFAULT NULL,
> `country_code` char(2) COLLATE utf8_unicode_ci DEFAULT NULL,
> `currencycode` char(3) COLLATE utf8_unicode_ci DEFAULT NULL,
> `district` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
> `hoteltype_id` int(11) DEFAULT NULL,
> `is_closed` tinyint(4) DEFAULT NULL,
> `latitude` double DEFAULT NULL,
> `longitude` double DEFAULT NULL,
> `maxrate` double DEFAULT NULL,
> `minrate` double DEFAULT NULL,
> `original_name` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
> `name` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
> `nr_rooms` int(11) DEFAULT NULL,
> `preferred` int(11) DEFAULT NULL,
> `ranking` int(11) DEFAULT NULL,
> `review_nr` int(11) DEFAULT NULL,
> `review_score` double DEFAULT NULL,
> `zip` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
> `checkin_from` varchar(15) COLLATE utf8_unicode_ci DEFAULT NULL,
> `checkin_to` varchar(15) COLLATE utf8_unicode_ci DEFAULT NULL,
> `checkout_from` varchar(15) COLLATE utf8_unicode_ci DEFAULT NULL,
> `checkout_to` varchar(15) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_title` varchar(70) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_keywords` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `meta_description` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `link_text` varchar(155) COLLATE utf8_unicode_ci DEFAULT NULL,
> `folder_url` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
> `short_profile` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
> `enabled` enum('Y','N') COLLATE utf8_unicode_ci NOT NULL DEFAULT 'N',
> `last_changed` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
> PRIMARY KEY (`hotel_id`,`language_code`),
> UNIQUE KEY `UNQ_folder_url` (`folder_url`),
> KEY `IDX_country_code` (`country_code`),
> KEY `IDX_enabled` (`enabled`),
> KEY `IDX_language_code` (`language_code`),
> KEY `IDX_latitude` (`latitude`),
> KEY `IDX_longitude` (`longitude`),
> KEY `IDX_name` (`name`)
> ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
>
> On Fri, Sep 30, 2011 at 6:08 PM, mark carson <mcar...@pixie.co.za> wrote:
> Hi
>
> You need version of mysql and table/key/index layout in order to get a
> response
>
> Mark
>
> On 2011/09/30 17:49, Tompkins Neil wrote:
> > Hi
> >
> > I've the following query :
> >
> > SELECT city_id, name, meta_title, meta_description, meta_keywords,
> > country_code, link_text, folder_url, enabled, last_changed, nr_hotels,
> > (SELECT COUNT(hotels.hotel_id) FROM hotels WHERE hotels.city_id =
> > cities.city_id AND hotels.country_code = 'gb' AND hotels.enabled = 'Y' AND
> > hotels.folder_url IS NOT NULL AND hotels.language_code = 'en') AS
> > hotel_count,
> > (SELECT COUNT(hotels.hotel_id) FROM hotels WHERE hotels.city_id =
> > cities.city_id AND hotels.country_code = 'gb' AND hotels.language_code =
> > 'en') AS available_hotel_count,
> > (SELECT COUNT(districts.city_id) FROM districts WHERE districts.city_id =
> > cities.city_id AND districts.language_code = 'en' AND districts.country_code
> > = 'gb') AS district_count
> > FROM cities WHERE language_code = 'en' AND country_code = 'gb'
> > ORDER BY cities.name ASC , cities.city_id ASC
> >
> > Previously the table format was Innodb with foreign keys and the query was
> > pretty much instant. Now I've changed the table format to MyISAM and
> > obviously removed the foreign keys and the query takes forever to execute
> > using the same data. Can anyone help and tell me where I've gone wrong.
> >
> > Thanks
> > Neil
> >
>
> --
> Mark Carson
> Managing
> Integrated Product Intelligence CC (CK95/35630/23)
> EMail : mcar...@ipi.co.za/ (secondary:mcar...@pixie.co.za)
> Physical Address : 34 Spanish Galliard, Mooikloof, Pretoria, South Africa
> snailmail : P.O. Box 36095 Menlo Park 0102, South Africa
> Tel. +27 12 996 1193/1815 Fax : +27 86 672 7012 Cell : +27 83 260 8515
>
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