{
    "__default": {
        "session": {
            "counter": 1,
            "timer": {
                "start": 1566395196,
                "last": 1566395196,
                "now": 1566395196
            },
            "token": "q4115CcujRrC5fmKu0j98MrbStFDd2w7"
        },
        "registry": {},
        "user": {
            "id": 0,
            "name": null,
            "username": null,
            "email": null,
            "password": null,
            "password_clear": "",
            "block": null,
            "sendEmail": 0,
            "registerDate": null,
            "lastvisitDate": null,
            "activation": null,
            "params": null,
            "groups": [],
            "guest": 1,
            "lastResetTime": null,
            "resetCount": null,
            "requireReset": null,
            "aid": 0
        }
    }
}

Time

Memory

20 Queries Logged 124.31 ms

1. Query Time: 0.32 ms Query memory: 0.019 MB Memory before query: 2.976 MB Rows returned: 0

   SELECT `data`
   
     FROM `qerl4_session`
   
     WHERE `session_id` = 'ai0u43mngpdok6prqcv6o1vfu3'

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	qerl4_session	const	PRIMARY	PRIMARY	766	const	1

   Profile

   Status	Duration
   starting	0.04 ms
   checking permissions	0.01 ms
   Opening tables	0.02 ms
   System lock	0.01 ms
   init	0.02 ms
   optimizing	0.01 ms
   statistics	0.05 ms
   preparing	0.00 ms
   executing	0.01 ms
   end	0.00 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.01 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   14	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1728
   13	JDatabaseDriver->loadResult()	JROOT/libraries/joomla/session/storage/database.php:44
   12	JSessionStorageDatabase->read()	Same as call in the line below.
   11	session_start()	JROOT/libraries/joomla/session/handler/native.php:258
   10	JSessionHandlerNative->doSessionStart()	JROOT/libraries/joomla/session/handler/native.php:49
   9	JSessionHandlerNative->start()	JROOT/libraries/joomla/session/handler/joomla.php:81
   8	JSessionHandlerJoomla->start()	JROOT/libraries/joomla/session/session.php:636
   7	JSession->_start()	JROOT/libraries/joomla/session/session.php:596
   6	JSession->start()	JROOT/libraries/cms/application/cms.php:748
   5	JApplicationCms->loadSession()	JROOT/libraries/cms/application/cms.php:131
   4	JApplicationCms->__construct()	JROOT/libraries/cms/application/site.php:63
   3	JApplicationSite->__construct()	JROOT/libraries/cms/application/cms.php:404
   2	JApplicationCms::getInstance()	JROOT/libraries/joomla/factory.php:125
   1	JFactory::getApplication()	JROOT/index.php:46

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

2. Query Time: 0.19 ms After last query: 2.64 ms Query memory: 0.012 MB Memory before query: 3.183 MB Rows returned: 0

   SELECT `session_id`
   
     FROM `qerl4_session`
   
     WHERE `session_id` = 'ai0u43mngpdok6prqcv6o1vfu3' 
     LIMIT 1

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	qerl4_session	const	PRIMARY	PRIMARY	766	const	1	Using index

   Profile

   Status	Duration
   starting	0.02 ms
   checking permissions	0.00 ms
   Opening tables	0.01 ms
   System lock	0.01 ms
   init	0.01 ms
   optimizing	0.00 ms
   statistics	0.02 ms
   preparing	0.00 ms
   executing	0.01 ms
   end	0.00 ms
   query end	0.00 ms
   closing tables	0.00 ms
   freeing items	0.01 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   8	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1728
   7	JDatabaseDriver->loadResult()	JROOT/libraries/cms/application/cms.php:176
   6	JApplicationCms->checkSession()	JROOT/libraries/cms/application/cms.php:774
   5	JApplicationCms->loadSession()	JROOT/libraries/cms/application/cms.php:131
   4	JApplicationCms->__construct()	JROOT/libraries/cms/application/site.php:63
   3	JApplicationSite->__construct()	JROOT/libraries/cms/application/cms.php:404
   2	JApplicationCms::getInstance()	JROOT/libraries/joomla/factory.php:125
   1	JFactory::getApplication()	JROOT/index.php:46

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

3. Query Time: 67.54 ms After last query: 0.18 ms Query memory: 0.009 MB Memory before query: 3.196 MB

   INSERT INTO `qerl4_session`
   (`session_id`, `client_id`, `time`) 
     VALUES 
   ('ai0u43mngpdok6prqcv6o1vfu3', 0, '1566395196')

   Explain

   EXPLAIN not possible on query: INSERT INTO `qerl4_session` (`session_id`, `client_id`, `time`) VALUES ('ai0u43mngpdok6prqcv6o1vfu3', 0, '1566395196')

   Profile

   Status	Duration
   starting	0.03 ms
   checking permissions	0.01 ms
   Opening tables	0.01 ms
   System lock	0.00 ms
   init	0.01 ms
   update	0.06 ms
   Waiting for query cache lock	0.00 ms
   update	0.00 ms
   end	0.00 ms
   query end	67.27 ms
   closing tables	0.01 ms
   freeing items	0.02 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   7	JDatabaseDriverMysqli->execute()	JROOT/libraries/cms/application/cms.php:208
   6	JApplicationCms->checkSession()	JROOT/libraries/cms/application/cms.php:774
   5	JApplicationCms->loadSession()	JROOT/libraries/cms/application/cms.php:131
   4	JApplicationCms->__construct()	JROOT/libraries/cms/application/site.php:63
   3	JApplicationSite->__construct()	JROOT/libraries/cms/application/cms.php:404
   2	JApplicationCms::getInstance()	JROOT/libraries/joomla/factory.php:125
   1	JFactory::getApplication()	JROOT/index.php:46

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

4. Query Time: 0.50 ms After last query: 6.60 ms Query memory: 0.017 MB Memory before query: 3.568 MB Rows returned: 31

   SELECT extension_id AS id, element AS "option", params, enabled
   
     FROM qerl4_extensions
   
     WHERE `type` = 'component'

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	qerl4_extensions	ref	extension	extension	82	const	31	Using where

   Profile

   Status	Duration
   starting	0.04 ms
   checking permissions	0.01 ms
   Opening tables	0.01 ms
   System lock	0.01 ms
   init	0.02 ms
   optimizing	0.01 ms
   statistics	0.06 ms
   preparing	0.01 ms
   executing	0.00 ms
   Sending data	0.20 ms
   end	0.01 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.02 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   10	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
   9	JDatabaseDriver->loadObjectList()	Same as call in the line below.
   8	call_user_func_array()	JROOT/libraries/joomla/cache/controller/callback.php:152
   7	JCacheControllerCallback->get()	JROOT/libraries/cms/component/helper.php:448
   6	JComponentHelper::load()	JROOT/libraries/cms/component/helper.php:43
   5	JComponentHelper::getComponent()	JROOT/libraries/cms/component/helper.php:120
   4	JComponentHelper::getParams()	JROOT/libraries/cms/application/site.php:584
   3	JApplicationSite->initialiseApp()	JROOT/libraries/cms/application/site.php:209
   2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
   1	JApplicationCms->execute()	JROOT/index.php:49

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

5. Query Time: 0.30 ms After last query: 3.41 ms Query memory: 0.014 MB Memory before query: 3.772 MB Rows returned: 2

   SELECT b.id
   
     FROM qerl4_usergroups AS a
   
     LEFT JOIN qerl4_usergroups AS b 
     ON b.lft <= a.lft 
     AND b.rgt >= a.rgt
   
     WHERE a.id = 9

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	a	const	PRIMARY	PRIMARY	4	const	1
   1	SIMPLE	b	range	idx_usergroup_nested_set_lookup	idx_usergroup_nested_set_lookup	4	NULL	3	Using where; Using index

   Profile

   Status	Duration
   starting	0.05 ms
   checking permissions	0.00 ms
   checking permissions	0.00 ms
   Opening tables	0.02 ms
   System lock	0.01 ms
   init	0.02 ms
   optimizing	0.01 ms
   statistics	0.05 ms
   preparing	0.02 ms
   executing	0.00 ms
   Sending data	0.03 ms
   end	0.00 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.02 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   10	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1538
   9	JDatabaseDriver->loadColumn()	JROOT/libraries/joomla/access/access.php:852
   8	JAccess::getGroupsByUser()	JROOT/libraries/joomla/access/access.php:921
   7	JAccess::getAuthorisedViewLevels()	JROOT/libraries/joomla/user/user.php:453
   6	JUser->getAuthorisedViewLevels()	JROOT/libraries/cms/plugin/helper.php:296
   5	JPluginHelper::load()	JROOT/libraries/cms/plugin/helper.php:163
   4	JPluginHelper::importPlugin()	JROOT/libraries/cms/application/site.php:589
   3	JApplicationSite->initialiseApp()	JROOT/libraries/cms/application/site.php:209
   2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
   1	JApplicationCms->execute()	JROOT/index.php:49

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

6. Query Time: 0.21 ms After last query: 1.04 ms Query memory: 0.013 MB Memory before query: 3.829 MB Rows returned: 5

   SELECT id, rules
   
     FROM `qerl4_viewlevels`

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	qerl4_viewlevels	ALL	NULL	NO INDEX KEY COULD BE USED	NULL	NULL	5

   Profile

   Status	Duration
   starting	0.02 ms
   checking permissions	0.01 ms
   Opening tables	0.01 ms
   System lock	0.01 ms
   init	0.01 ms
   optimizing	0.00 ms
   statistics	0.01 ms
   preparing	0.01 ms
   executing	0.00 ms
   Sending data	0.04 ms
   end	0.00 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.01 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   9	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1494
   8	JDatabaseDriver->loadAssocList()	JROOT/libraries/joomla/access/access.php:938
   7	JAccess::getAuthorisedViewLevels()	JROOT/libraries/joomla/user/user.php:453
   6	JUser->getAuthorisedViewLevels()	JROOT/libraries/cms/plugin/helper.php:296
   5	JPluginHelper::load()	JROOT/libraries/cms/plugin/helper.php:163
   4	JPluginHelper::importPlugin()	JROOT/libraries/cms/application/site.php:589
   3	JApplicationSite->initialiseApp()	JROOT/libraries/cms/application/site.php:209
   2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
   1	JApplicationCms->execute()	JROOT/index.php:49

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

7. Query Time: 0.86 ms After last query: 0.33 ms Query memory: 0.012 MB Memory before query: 3.848 MB Rows returned: 42

   SELECT folder AS type, element AS name, params
   
     FROM qerl4_extensions
   
     WHERE enabled = 1 
     AND type ='plugin' 
     AND state IN (0,1) 
     AND access IN (1,1,5)
   
     ORDER BY ordering

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	qerl4_extensions	ref	extension	extension	82	const	55	Using where; Using filesort

   Profile

   Status	Duration
   starting	0.05 ms
   checking permissions	0.01 ms
   Opening tables	0.01 ms
   System lock	0.01 ms
   init	0.02 ms
   optimizing	0.01 ms
   statistics	0.04 ms
   preparing	0.03 ms
   executing	0.00 ms
   Sorting result	0.27 ms
   Sending data	0.28 ms
   end	0.01 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.02 ms
   logging slow query	0.00 ms
   cleaning up	0.01 ms

   Call Stack

   #	Caller	File and line number
   7	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
   6	JDatabaseDriver->loadObjectList()	JROOT/libraries/cms/plugin/helper.php:310
   5	JPluginHelper::load()	JROOT/libraries/cms/plugin/helper.php:163
   4	JPluginHelper::importPlugin()	JROOT/libraries/cms/application/site.php:589
   3	JApplicationSite->initialiseApp()	JROOT/libraries/cms/application/site.php:209
   2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
   1	JApplicationCms->execute()	JROOT/index.php:49

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

8. Query Time: 0.45 ms After last query: 19.50 ms Query memory: 0.025 MB Memory before query: 5.153 MB Rows returned: 1

   SELECT m.id, m.menutype, m.title, m.alias, m.note, m.path AS route, m.link, m.type, m.level, m.language,`m`.`browserNav`, m.access, m.params, m.home, m.img, m.template_style_id, m.component_id, m.parent_id,e.element as component
   
     FROM qerl4_menu AS m
   
     LEFT JOIN qerl4_extensions AS e 
     ON m.component_id = e.extension_id
   
     WHERE m.published = 1 
     AND m.parent_id > 0 
     AND m.client_id = 0
   
     ORDER BY m.lft

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	m	range	idx_client_id_parent_id_alias_language	idx_client_id_parent_id_alias_language	5	NULL	1	Using where; Using filesort
   1	SIMPLE	e	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.m.component_id	1

   Profile

   Status	Duration
   starting	0.08 ms
   checking permissions	0.00 ms
   checking permissions	0.00 ms
   Opening tables	0.02 ms
   System lock	0.01 ms
   init	0.03 ms
   optimizing	0.01 ms
   statistics	0.05 ms
   preparing	0.02 ms
   executing	0.00 ms
   Sorting result	0.05 ms
   Sending data	0.06 ms
   end	0.01 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.02 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   16	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
   15	JDatabaseDriver->loadObjectList()	JROOT/libraries/cms/menu/site.php:86
   14	JMenuSite->load()	JROOT/libraries/cms/menu/menu.php:74
   13	JMenu->__construct()	JROOT/libraries/cms/menu/site.php:57
   12	JMenuSite->__construct()	JROOT/libraries/cms/menu/menu.php:133
   11	JMenu::getInstance()	JROOT/libraries/cms/application/cms.php:435
   10	JApplicationCms->getMenu()	JROOT/libraries/cms/application/site.php:272
   9	JApplicationSite->getMenu()	JROOT/libraries/cms/router/site.php:57
   8	JRouterSite->__construct()	JROOT/libraries/cms/router/router.php:196
   7	JRouter::getInstance()	JROOT/libraries/cms/application/cms.php:531
   6	JApplicationCms::getRouter()	JROOT/libraries/cms/application/site.php:407
   5	JApplicationSite::getRouter()	JROOT/libraries/cms/application/cms.php:1097
   4	JApplicationCms->route()	JROOT/libraries/cms/application/site.php:763
   3	JApplicationSite->route()	JROOT/libraries/cms/application/site.php:215
   2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
   1	JApplicationCms->execute()	JROOT/index.php:49

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

9. Query Time: 0.30 ms After last query: 1.61 ms Query memory: 0.019 MB Memory before query: 5.300 MB Rows returned: 1

   SELECT extension_id AS id, element AS "option", params, enabled
   
     FROM qerl4_extensions
   
     WHERE `type` = 'library' 
     AND `element` = 'joomla'

   Explain

   id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
   1	SIMPLE	qerl4_extensions	ref	element_clientid,element_folder_clientid,extension	extension	484	const,const	1	Using where

   Profile

   Status	Duration
   starting	0.03 ms
   checking permissions	0.01 ms
   Opening tables	0.01 ms
   System lock	0.01 ms
   init	0.02 ms
   optimizing	0.01 ms
   statistics	0.07 ms
   preparing	0.01 ms
   executing	0.00 ms
   Sending data	0.04 ms
   end	0.00 ms
   query end	0.00 ms
   closing tables	0.01 ms
   freeing items	0.01 ms
   logging slow query	0.00 ms
   cleaning up	0.00 ms

   Call Stack

   #	Caller	File and line number
   14	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1650
   13	JDatabaseDriver->loadObject()	Same as call in the line below.
   12	call_user_func_array()	JROOT/libraries/joomla/cache/controller/callback.php:152
   11	JCacheControllerCallback->get()	JROOT/libraries/cms/library/helper.php:156
   10	JLibraryHelper::_load()	JROOT/libraries/cms/library/helper.php:47
   9	JLibraryHelper::getLibrary()	JROOT/libraries/cms/library/helper.php:90
   8	JLibraryHelper::getParams()	JROOT/libraries/cms/version/version.php:274
   7	JVersion->getMediaVersion()	JROOT/libraries/joomla/factory.php:755
   6	JFactory::createDocument()	JROOT/libraries/joomla/factory.php:216
   5	JFactory::getDocument()	JROOT/libraries/joomla/application/web.php:991
   4	JApplicationWeb->loadDocument()	JROOT/libraries/cms/application/site.php:130
   3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
   2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
   1	JApplicationCms->execute()	JROOT/index.php:49

   [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

   ---

10. Query Time: 48.07 ms After last query: 0.32 ms Query memory: 0.013 MB Memory before query: 5.303 MB

    UPDATE `qerl4_extensions`
    
      SET `params` = '{\"mediaversion\":\"be8078ccbdd2fbe7755d0705d9e1c445\"}'
    
      WHERE `type` = 'library' 
      AND `element` = 'joomla'

    Explain

    EXPLAIN not possible on query: UPDATE `qerl4_extensions` SET `params` = '{\"mediaversion\":\"be8078ccbdd2fbe7755d0705d9e1c445\"}' WHERE `type` = 'library' AND `element` = 'joomla'

    Profile

    Status	Duration
    starting	0.02 ms
    checking permissions	0.00 ms
    Opening tables	0.01 ms
    System lock	0.00 ms
    init	0.05 ms
    Updating	0.05 ms
    end	0.00 ms
    Waiting for query cache lock	0.00 ms
    end	0.01 ms
    query end	47.84 ms
    closing tables	0.01 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    10	JDatabaseDriverMysqli->execute()	JROOT/libraries/cms/library/helper.php:119
    9	JLibraryHelper::saveParams()	JROOT/libraries/cms/version/version.php:325
    8	JVersion->setMediaVersion()	JROOT/libraries/cms/version/version.php:284
    7	JVersion->getMediaVersion()	JROOT/libraries/joomla/factory.php:755
    6	JFactory::createDocument()	JROOT/libraries/joomla/factory.php:216
    5	JFactory::getDocument()	JROOT/libraries/joomla/application/web.php:991
    4	JApplicationWeb->loadDocument()	JROOT/libraries/cms/application/site.php:130
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

11. Query Time: 0.28 ms After last query: 4.18 ms Query memory: 0.014 MB Memory before query: 5.577 MB Rows returned: 1

    SELECT *
    
      FROM qerl4_languages
    
      WHERE published=1
    
      ORDER BY ordering ASC

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	qerl4_languages	ALL	NULL	NO INDEX KEY COULD BE USED	NULL	NULL	1	Using where; Using filesort

    Profile

    Status	Duration
    starting	0.03 ms
    checking permissions	0.00 ms
    Opening tables	0.01 ms
    System lock	0.01 ms
    init	0.02 ms
    optimizing	0.01 ms
    statistics	0.01 ms
    preparing	0.01 ms
    executing	0.00 ms
    Sorting result	0.04 ms
    Sending data	0.04 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.01 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    7	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
    6	JDatabaseDriver->loadObjectList()	JROOT/libraries/joomla/language/helper.php:164
    5	JLanguageHelper::getLanguages()	JROOT/libraries/cms/application/site.php:329
    4	JApplicationSite->getParams()	JROOT/libraries/cms/application/site.php:135
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

12. Query Time: 0.37 ms After last query: 0.89 ms Query memory: 0.010 MB Memory before query: 5.599 MB Rows returned: 2

    SELECT id, home, template, s.params
    
      FROM qerl4_template_styles as s
    
      LEFT JOIN qerl4_extensions as e 
      ON e.element=s.template 
      AND e.type='template' 
      AND e.client_id=s.client_id
    
      WHERE s.client_id = 0 
      AND e.enabled = 1

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	s	ALL	idx_template	NO INDEX KEY COULD BE USED	NULL	NULL	4	Using where
    1	SIMPLE	e	ref	element_clientid,element_folder_clientid,extension	element_clientid	403	wdwc_regfff.s.template,const	1	Using where

    Profile

    Status	Duration
    starting	0.05 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    Opening tables	0.01 ms
    System lock	0.01 ms
    init	0.02 ms
    optimizing	0.02 ms
    statistics	0.05 ms
    preparing	0.02 ms
    executing	0.00 ms
    Sending data	0.07 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.01 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    6	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
    5	JDatabaseDriver->loadObjectList()	JROOT/libraries/cms/application/site.php:484
    4	JApplicationSite->getTemplate()	JROOT/libraries/cms/application/site.php:165
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

13. Query Time: 0.81 ms After last query: 16.17 ms Query memory: 0.034 MB Memory before query: 6.842 MB Rows returned: 8

    SHOW FULL COLUMNS 
      FROM `qerl4_assets`

    Explain

    EXPLAIN not possible on query: SHOW FULL COLUMNS FROM `qerl4_assets`

    Profile

    Status	Duration
    starting	0.02 ms
    checking permissions	0.00 ms
    Opening tables	0.27 ms
    System lock	0.01 ms
    init	0.01 ms
    optimizing	0.00 ms
    statistics	0.01 ms
    preparing	0.01 ms
    executing	0.01 ms
    Opening tables	0.02 ms
    checking permissions	0.04 ms
    checking permissions	0.02 ms
    checking permissions	0.02 ms
    checking permissions	0.02 ms
    checking permissions	0.02 ms
    checking permissions	0.02 ms
    checking permissions	0.02 ms
    checking permissions	0.03 ms
    Sending data	0.07 ms
    end	0.00 ms
    query end	0.00 ms
    closing tables	0.00 ms
    removing tmp table	0.10 ms
    closing tables	0.00 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    24	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
    23	JDatabaseDriver->loadObjectList()	JROOT/libraries/joomla/database/driver/mysqli.php:440
    22	JDatabaseDriverMysqli->getTableColumns()	JROOT/libraries/joomla/table/table.php:241
    21	JTable->getFields()	JROOT/libraries/joomla/table/table.php:162
    20	JTable->__construct()	JROOT/libraries/joomla/table/asset.php:60
    19	JTableAsset->__construct()	JROOT/libraries/joomla/table/table.php:304
    18	JTable::getInstance()	JROOT/libraries/joomla/access/access.php:714
    17	JAccess::getExtensionNameFromAsset()	JROOT/libraries/joomla/access/access.php:576
    16	JAccess::getAssetRules()	JROOT/libraries/joomla/user/user.php:384
    15	JUser->authorise()	JROOT/components/com_content/models/articles.php:111
    14	ContentModelArticles->populateState()	JROOT/components/com_content/models/featured.php:42
    13	ContentModelFeatured->populateState()	JROOT/libraries/legacy/model/legacy.php:439
    12	JModelLegacy->getState()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:46
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

14. Query Time: 0.17 ms After last query: 0.84 ms Query memory: 0.028 MB Memory before query: 6.916 MB Rows returned: 1

    SELECT *
    
      FROM qerl4_assets
    
      WHERE `id` = '1'

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	qerl4_assets	const	PRIMARY	PRIMARY	4	const	1

    Profile

    Status	Duration
    starting	0.02 ms
    checking permissions	0.00 ms
    Opening tables	0.01 ms
    System lock	0.01 ms
    init	0.01 ms
    optimizing	0.00 ms
    statistics	0.02 ms
    preparing	0.01 ms
    executing	0.00 ms
    Sending data	0.01 ms
    end	0.00 ms
    query end	0.00 ms
    closing tables	0.00 ms
    freeing items	0.01 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    20	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1453
    19	JDatabaseDriver->loadAssoc()	JROOT/libraries/joomla/table/table.php:715
    18	JTable->load()	JROOT/libraries/joomla/access/access.php:715
    17	JAccess::getExtensionNameFromAsset()	JROOT/libraries/joomla/access/access.php:576
    16	JAccess::getAssetRules()	JROOT/libraries/joomla/user/user.php:384
    15	JUser->authorise()	JROOT/components/com_content/models/articles.php:111
    14	ContentModelArticles->populateState()	JROOT/components/com_content/models/featured.php:42
    13	ContentModelFeatured->populateState()	JROOT/libraries/legacy/model/legacy.php:439
    12	JModelLegacy->getState()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:46
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

15. Query Time: 0.24 ms After last query: 0.22 ms Query memory: 0.024 MB Memory before query: 6.939 MB Rows returned: 1

    SELECT a.rules
    
      FROM qerl4_assets AS a
    
      WHERE (a.id = 1 OR a.name = 'root.1')

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	a	index_merge	PRIMARY,idx_asset_name	PRIMARY,idx_asset_name	4,202	NULL	2	Using union(PRIMARY,idx_asset_name); Using where

    Profile

    Status	Duration
    starting	0.02 ms
    checking permissions	0.00 ms
    Opening tables	0.01 ms
    System lock	0.00 ms
    init	0.01 ms
    optimizing	0.01 ms
    statistics	0.02 ms
    preparing	0.01 ms
    executing	0.00 ms
    Sending data	0.07 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.01 ms
    freeing items	0.01 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    18	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1538
    17	JDatabaseDriver->loadColumn()	JROOT/libraries/joomla/access/access.php:670
    16	JAccess::getAssetRules()	JROOT/libraries/joomla/user/user.php:384
    15	JUser->authorise()	JROOT/components/com_content/models/articles.php:111
    14	ContentModelArticles->populateState()	JROOT/components/com_content/models/featured.php:42
    13	ContentModelFeatured->populateState()	JROOT/libraries/legacy/model/legacy.php:439
    12	JModelLegacy->getState()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:46
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

16. Query Time: 0.33 ms After last query: 0.82 ms Query memory: 0.027 MB Memory before query: 6.998 MB Rows returned: 30

    SELECT element
    
      FROM qerl4_extensions
    
      WHERE type = 'component' 
      AND enabled = '1'

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	qerl4_extensions	ref	extension	extension	82	const	31	Using where

    Profile

    Status	Duration
    starting	0.02 ms
    checking permissions	0.00 ms
    Opening tables	0.01 ms
    System lock	0.01 ms
    init	0.01 ms
    optimizing	0.01 ms
    statistics	0.03 ms
    preparing	0.01 ms
    executing	0.00 ms
    Sending data	0.14 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.01 ms
    freeing items	0.01 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    20	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1538
    19	JDatabaseDriver->loadColumn()	JROOT/libraries/joomla/access/access.php:412
    18	JAccess::preloadComponents()	JROOT/libraries/joomla/access/access.php:213
    17	JAccess::preload()	JROOT/libraries/joomla/access/access.php:168
    16	JAccess::check()	JROOT/libraries/joomla/user/user.php:393
    15	JUser->authorise()	JROOT/components/com_content/models/articles.php:111
    14	ContentModelArticles->populateState()	JROOT/components/com_content/models/featured.php:42
    13	ContentModelFeatured->populateState()	JROOT/libraries/legacy/model/legacy.php:439
    12	JModelLegacy->getState()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:46
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

17. Query Time: 0.61 ms After last query: 0.27 ms Query memory: 0.028 MB Memory before query: 7.031 MB Rows returned: 30

    SELECT a.name, a.rules
    
      FROM qerl4_assets AS a
    
      WHERE (a.name IN ('com_admin','com_ajax','com_banners','com_cache','com_categories','com_checkin','com_config','com_contact','com_content','com_contenthistory','com_cpanel','com_finder','com_installer','com_joomlaupdate','com_languages','com_login','com_mailto','com_media','com_menus','com_messages','com_modules','com_newsfeeds','com_plugins','com_postinstall','com_redirect','com_search','com_tags','com_templates','com_users','com_wrapper') OR a.name = 'root.1')

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	a	ALL	idx_asset_name	NO INDEX KEY COULD BE USED	NULL	NULL	52	Using where

    Profile

    Status	Duration
    starting	0.06 ms
    checking permissions	0.01 ms
    Opening tables	0.01 ms
    System lock	0.01 ms
    init	0.05 ms
    optimizing	0.01 ms
    statistics	0.16 ms
    preparing	0.01 ms
    executing	0.00 ms
    Sending data	0.18 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.01 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    20	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1494
    19	JDatabaseDriver->loadAssocList()	JROOT/libraries/joomla/access/access.php:439
    18	JAccess::preloadComponents()	JROOT/libraries/joomla/access/access.php:213
    17	JAccess::preload()	JROOT/libraries/joomla/access/access.php:168
    16	JAccess::check()	JROOT/libraries/joomla/user/user.php:393
    15	JUser->authorise()	JROOT/components/com_content/models/articles.php:111
    14	ContentModelArticles->populateState()	JROOT/components/com_content/models/featured.php:42
    13	ContentModelFeatured->populateState()	JROOT/libraries/legacy/model/legacy.php:439
    12	JModelLegacy->getState()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:46
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

18. Query Time: 1.50 ms After last query: 3.00 ms Query memory: 0.032 MB Memory before query: 7.305 MB Rows returned: 0

    SELECT a.id, a.title, a.alias, a.introtext, a.fulltext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias, 
      CASE WHEN a.modified = '0000-00-00 00:00:00' THEN a.created ELSE a.modified END as modified, a.modified_by, uam.name as modified_by_name,
      CASE WHEN a.publish_up = '0000-00-00 00:00:00' THEN a.created ELSE a.publish_up END as publish_up,a.publish_down, a.images, a.urls, a.attribs, a.metadata, a.metakey, a.metadesc, a.access, a.hits, a.xreference, a.featured, a.language,  LENGTH(a.fulltext) AS readmore,
      CASE WHEN badcats.id is not null THEN 0 ELSE a.state END AS state,c.title AS category_title, c.path AS category_route, c.access AS category_access, c.alias AS category_alias,
      CASE WHEN a.created_by_alias > ' ' THEN a.created_by_alias ELSE ua.name END AS author,ua.email AS author_email,parent.title as parent_title, parent.id as parent_id, parent.path as parent_route, parent.alias as parent_alias,ROUND(v.rating_sum / v.rating_count, 0) AS rating, v.rating_count as rating_count,c.published, 
      CASE WHEN badcats.id is null THEN c.published ELSE 0 END AS parents_published
    
      FROM qerl4_content AS a
    
      INNER JOIN qerl4_content_frontpage AS fp 
      ON fp.content_id = a.id
    
      LEFT JOIN qerl4_categories AS c 
      ON c.id = a.catid
    
      LEFT JOIN qerl4_users AS ua 
      ON ua.id = a.created_by
    
      LEFT JOIN qerl4_users AS uam 
      ON uam.id = a.modified_by
    
      LEFT JOIN qerl4_categories as parent 
      ON parent.id = c.parent_id
    
      LEFT JOIN qerl4_content_rating AS v 
      ON a.id = v.content_id
    
      LEFT 
      OUTER JOIN (SELECT cat.id as id 
      FROM qerl4_categories AS cat JOIN qerl4_categories AS parent 
      ON cat.lft BETWEEN parent.lft 
      AND parent.rgt 
      WHERE parent.extension = 'com_content' 
      AND parent.published != 1 
      GROUP BY cat.id ) AS badcats 
      ON badcats.id = c.id
    
      WHERE a.access IN (1,1,5) 
      AND c.access IN (1,1,5) 
      AND 
      CASE WHEN badcats.id is null THEN a.state ELSE 0 END = 1 
      AND (a.publish_up = '0000-00-00 00:00:00' OR a.publish_up <= '2019-08-21 13:46:36') 
      AND (a.publish_down = '0000-00-00 00:00:00' OR a.publish_down >= '2019-08-21 13:46:36')
    
      ORDER BY c.lft,  a.featured DESC, fp.ordering,  
      CASE WHEN a.publish_up = '0000-00-00 00:00:00' THEN a.created ELSE a.publish_up END  DESC ,  a.created DESC   
      LIMIT 4

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	PRIMARY	<derived2>	system	NULL	NO INDEX KEY COULD BE USED	NULL	NULL	0	const row not found
    1	PRIMARY	a	ALL	PRIMARY,idx_access,idx_catid	NO INDEX KEY COULD BE USED	NULL	NULL	1	Using where; Using temporary; Using filesort
    1	PRIMARY	fp	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.id	1	Using where
    1	PRIMARY	c	eq_ref	PRIMARY,idx_access	PRIMARY	4	wdwc_regfff.a.catid	1	Using where
    1	PRIMARY	ua	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.created_by	1
    1	PRIMARY	uam	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.modified_by	1
    1	PRIMARY	parent	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.c.parent_id	1
    1	PRIMARY	v	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.id	1
    2	DERIVED	cat	index	idx_left_right	idx_left_right	8	NULL	6	Using index; Using temporary; Using filesort
    2	DERIVED	parent	ALL	cat_idx,idx_left_right	NO INDEX KEY COULD BE USED	NULL	NULL	6	Using where; Using join buffer

    Profile

    Status	Duration
    starting	0.26 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    Opening tables	0.04 ms
    System lock	0.05 ms
    optimizing	0.01 ms
    statistics	0.06 ms
    preparing	0.02 ms
    Creating tmp table	0.02 ms
    executing	0.00 ms
    Copying to tmp table	0.05 ms
    Sorting result	0.01 ms
    Sending data	0.01 ms
    removing tmp table	0.01 ms
    Sending data	0.00 ms
    init	0.13 ms
    optimizing	0.03 ms
    statistics	0.07 ms
    preparing	0.05 ms
    Creating tmp table	0.33 ms
    executing	0.00 ms
    Copying to tmp table	0.05 ms
    Sorting result	0.01 ms
    Sending data	0.05 ms
    end	0.00 ms
    removing tmp table	0.07 ms
    end	0.00 ms
    query end	0.00 ms
    closing tables	0.00 ms
    removing tmp table	0.00 ms
    closing tables	0.01 ms
    freeing items	0.03 ms
    logging slow query	0.00 ms
    cleaning up	0.01 ms

    Call Stack

    #	Caller	File and line number
    17	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
    16	JDatabaseDriver->loadObjectList()	JROOT/libraries/legacy/model/legacy.php:312
    15	JModelLegacy->_getList()	JROOT/libraries/legacy/model/list.php:185
    14	JModelList->getItems()	JROOT/components/com_content/models/articles.php:566
    13	ContentModelArticles->getItems()	JROOT/components/com_content/models/featured.php:90
    12	ContentModelFeatured->getItems()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:47
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

19. Query Time: 0.58 ms After last query: 2.01 ms Query memory: 0.022 MB Memory before query: 7.448 MB Rows returned: 1

    SELECT COUNT(*)
    
      FROM qerl4_content AS a
    
      INNER JOIN qerl4_content_frontpage AS fp 
      ON fp.content_id = a.id
    
      LEFT JOIN qerl4_categories AS c 
      ON c.id = a.catid
    
      LEFT JOIN qerl4_users AS ua 
      ON ua.id = a.created_by
    
      LEFT JOIN qerl4_users AS uam 
      ON uam.id = a.modified_by
    
      LEFT JOIN qerl4_categories as parent 
      ON parent.id = c.parent_id
    
      LEFT JOIN qerl4_content_rating AS v 
      ON a.id = v.content_id
    
      LEFT 
      OUTER JOIN (SELECT cat.id as id 
      FROM qerl4_categories AS cat JOIN qerl4_categories AS parent 
      ON cat.lft BETWEEN parent.lft 
      AND parent.rgt 
      WHERE parent.extension = 'com_content' 
      AND parent.published != 1 
      GROUP BY cat.id ) AS badcats 
      ON badcats.id = c.id
    
      WHERE a.access IN (1,1,5) 
      AND c.access IN (1,1,5) 
      AND 
      CASE WHEN badcats.id is null THEN a.state ELSE 0 END = 1 
      AND (a.publish_up = '0000-00-00 00:00:00' OR a.publish_up <= '2019-08-21 13:46:36') 
      AND (a.publish_down = '0000-00-00 00:00:00' OR a.publish_down >= '2019-08-21 13:46:36')

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	PRIMARY	<derived2>	system	NULL	NO INDEX KEY COULD BE USED	NULL	NULL	0	const row not found
    1	PRIMARY	a	ALL	PRIMARY,idx_access,idx_catid	NO INDEX KEY COULD BE USED	NULL	NULL	1	Using where
    1	PRIMARY	fp	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.id	1	Using where; Using index
    1	PRIMARY	c	eq_ref	PRIMARY,idx_access	PRIMARY	4	wdwc_regfff.a.catid	1	Using where
    1	PRIMARY	ua	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.created_by	1	Using index
    1	PRIMARY	uam	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.modified_by	1	Using index
    1	PRIMARY	parent	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.c.parent_id	1	Using index
    1	PRIMARY	v	eq_ref	PRIMARY	PRIMARY	4	wdwc_regfff.a.id	1	Using index
    2	DERIVED	cat	index	idx_left_right	idx_left_right	8	NULL	6	Using index; Using temporary; Using filesort
    2	DERIVED	parent	ALL	cat_idx,idx_left_right	NO INDEX KEY COULD BE USED	NULL	NULL	6	Using where; Using join buffer

    Profile

    Status	Duration
    starting	0.09 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    Opening tables	0.02 ms
    System lock	0.04 ms
    optimizing	0.01 ms
    statistics	0.04 ms
    preparing	0.01 ms
    Creating tmp table	0.01 ms
    executing	0.00 ms
    Copying to tmp table	0.03 ms
    Sorting result	0.01 ms
    Sending data	0.00 ms
    removing tmp table	0.00 ms
    Sending data	0.00 ms
    init	0.03 ms
    optimizing	0.02 ms
    statistics	0.07 ms
    preparing	0.05 ms
    executing	0.01 ms
    Sending data	0.03 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.00 ms
    removing tmp table	0.00 ms
    closing tables	0.01 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.01 ms

    Call Stack

    #	Caller	File and line number
    16	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1728
    15	JDatabaseDriver->loadResult()	JROOT/libraries/legacy/model/legacy.php:341
    14	JModelLegacy->_getListCount()	JROOT/libraries/legacy/model/list.php:290
    13	JModelList->getTotal()	JROOT/libraries/legacy/model/list.php:235
    12	JModelList->getPagination()	JROOT/libraries/legacy/view/legacy.php:401
    11	JViewLegacy->get()	JROOT/components/com_content/views/featured/view.html.php:48
    10	ContentViewFeatured->display()	JROOT/libraries/legacy/controller/legacy.php:690
    9	JControllerLegacy->display()	JROOT/components/com_content/controller.php:113
    8	ContentController->display()	JROOT/libraries/legacy/controller/legacy.php:728
    7	JControllerLegacy->execute()	JROOT/components/com_content/content.php:38
    6	require_once JROOT/components/com_content/content.php	JROOT/libraries/cms/component/helper.php:405
    5	JComponentHelper::executeComponent()	JROOT/libraries/cms/component/helper.php:380
    4	JComponentHelper::renderComponent()	JROOT/libraries/cms/application/site.php:191
    3	JApplicationSite->dispatch()	JROOT/libraries/cms/application/site.php:230
    2	JApplicationSite->doExecute()	JROOT/libraries/cms/application/cms.php:257
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

20. Query Time: 0.65 ms After last query: 12.81 ms Query memory: 0.020 MB Memory before query: 8.238 MB Rows returned: 3

    SELECT m.id, m.title, m.module, m.position, m.content, m.showtitle, m.params, mm.menuid
    
      FROM qerl4_modules AS m
    
      LEFT JOIN qerl4_modules_menu AS mm 
      ON mm.moduleid = m.id
    
      LEFT JOIN qerl4_extensions AS e 
      ON e.element = m.module 
      AND e.client_id = m.client_id
    
      WHERE m.published = 1 
      AND e.enabled = 1 
      AND (m.publish_up = '0000-00-00 00:00:00' OR m.publish_up <= '2019-08-21 13:46:36') 
      AND (m.publish_down = '0000-00-00 00:00:00' OR m.publish_down >= '2019-08-21 13:46:36') 
      AND m.access IN (1,1,5) 
      AND m.client_id = 0 
      AND (mm.menuid = 101 OR mm.menuid <= 0)
    
      ORDER BY m.position, m.ordering

    Explain

    id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
    1	SIMPLE	m	ref	PRIMARY,published,newsfeeds	published	1	const	5	Using where; Using filesort
    1	SIMPLE	mm	ref	PRIMARY	PRIMARY	4	wdwc_regfff.m.id	1	Using where; Using index
    1	SIMPLE	e	ref	element_clientid,element_folder_clientid	element_clientid	403	wdwc_regfff.m.module,const	1	Using where

    Profile

    Status	Duration
    starting	0.10 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    checking permissions	0.00 ms
    Opening tables	0.02 ms
    System lock	0.01 ms
    init	0.05 ms
    optimizing	0.03 ms
    statistics	0.06 ms
    preparing	0.04 ms
    executing	0.00 ms
    Sorting result	0.10 ms
    Sending data	0.12 ms
    end	0.01 ms
    query end	0.00 ms
    closing tables	0.01 ms
    freeing items	0.02 ms
    logging slow query	0.00 ms
    cleaning up	0.00 ms

    Call Stack

    #	Caller	File and line number
    13	JDatabaseDriverMysqli->execute()	JROOT/libraries/joomla/database/driver.php:1689
    12	JDatabaseDriver->loadObjectList()	JROOT/libraries/cms/module/helper.php:409
    11	JModuleHelper::getModuleList()	JROOT/libraries/cms/module/helper.php:352
    10	JModuleHelper::load()	JROOT/libraries/cms/module/helper.php:84
    9	JModuleHelper::getModules()	JROOT/libraries/joomla/document/html.php:501
    8	JDocumentHtml->countModules()	JROOT/templates/protostar/index.php:94
    7	require JROOT/templates/protostar/index.php	JROOT/libraries/joomla/document/html.php:578
    6	JDocumentHtml->_loadTemplate()	JROOT/libraries/joomla/document/html.php:640
    5	JDocumentHtml->_fetchTemplate()	JROOT/libraries/joomla/document/html.php:455
    4	JDocumentHtml->parse()	JROOT/libraries/cms/application/cms.php:1054
    3	JApplicationCms->render()	JROOT/libraries/cms/application/site.php:745
    2	JApplicationSite->render()	JROOT/libraries/cms/application/cms.php:263
    1	JApplicationCms->execute()	JROOT/index.php:49

    [Add xdebug.file_link_format directive to your php.ini file to have links for files.]

    ---

19 Query Types Logged, Sorted by Occurrences.

SELECT Tables:

1. 2 × SELECT extension_id AS id, element AS "option", params, enabled 
     FROM qerl4_extensions

2. 1 × SELECT element 
     FROM qerl4_extensions

3. 1 × SELECT a.rules 
     FROM qerl4_assets AS a

4. 1 × SELECT a.name, a.rules 
     FROM qerl4_assets AS a

5. 1 × SELECT COUNT(*) 
     FROM qerl4_content AS a 
     INNER JOIN qerl4_content_frontpage AS fp 
     ON fp.content_id = a.id 
     LEFT JOIN qerl4_categories AS c 
     ON c.id = a.catid 
     LEFT JOIN qerl4_users AS ua 
     ON ua.id = a.created_by 
     LEFT JOIN qerl4_users AS uam 
     ON uam.id = a.modified_by 
     LEFT JOIN qerl4_categories as parent 
     ON parent.id = c.parent_id 
     LEFT JOIN qerl4_content_rating AS v 
     ON a.id = v.content_id 
     LEFT 
     OUTER JOIN (SELECT cat.id as id 
     FROM qerl4_categories AS cat JOIN qerl4_categories AS parent 
     ON cat.lft BETWEEN parent.lft 
     AND parent.rgt

6. 1 × SELECT m.id, m.title, m.module, m.position, m.content, m.showtitle, m.params, mm.menuid 
     FROM qerl4_modules AS m 
     LEFT JOIN qerl4_modules_menu AS mm 
     ON mm.moduleid = m.id 
     LEFT JOIN qerl4_extensions AS e 
     ON e.element = m.module 
     AND e.client_id = m.client_id

7. 1 × SELECT * 
     FROM qerl4_assets

8. 1 × SELECT a.id, a.title, a.alias, a.introtext, a.fulltext, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, a.created_by_alias, 
     CASE WHEN a.modified = '0000-00-00 00:00:00' THEN a.created ELSE a.modified END as modified, a.modified_by, uam.name as modified_by_name,
     CASE WHEN a.publish_up = '0000-00-00 00:00:00' THEN a.created ELSE a.publish_up END as publish_up,a.publish_down, a.images, a.urls, a.attribs, a.metadata, a.metakey, a.metadesc, a.access, a.hits, a.xreference, a.featured, a.language,  LENGTH(a.fulltext) AS readmore,
     CASE WHEN badcats.id is not null THEN 0 ELSE a.state END AS state,c.title AS category_title, c.path AS category_route, c.access AS category_access, c.alias AS category_alias,
     CASE WHEN a.created_by_alias > ' ' THEN a.created_by_alias ELSE ua.name END AS author,ua.email AS author_email,parent.title as parent_title, parent.id as parent_id, parent.path as parent_route, parent.alias as parent_alias,ROUND(v.rating_sum / v.rating_count, 0) AS rating, v.rating_count as rating_count,c.published, 
     CASE WHEN badcats.id is null THEN c.published ELSE 0 END AS parents_published 
     FROM qerl4_content AS a 
     INNER JOIN qerl4_content_frontpage AS fp 
     ON fp.content_id = a.id 
     LEFT JOIN qerl4_categories AS c 
     ON c.id = a.catid 
     LEFT JOIN qerl4_users AS ua 
     ON ua.id = a.created_by 
     LEFT JOIN qerl4_users AS uam 
     ON uam.id = a.modified_by 
     LEFT JOIN qerl4_categories as parent 
     ON parent.id = c.parent_id 
     LEFT JOIN qerl4_content_rating AS v 
     ON a.id = v.content_id 
     LEFT 
     OUTER JOIN (SELECT cat.id as id 
     FROM qerl4_categories AS cat JOIN qerl4_categories AS parent 
     ON cat.lft BETWEEN parent.lft 
     AND parent.rgt

9. 1 × SELECT * 
     FROM qerl4_languages

10. 1 × SELECT b.id 
      FROM qerl4_usergroups AS a 
      LEFT JOIN qerl4_usergroups AS b 
      ON b.lft <= a.lft 
      AND b.rgt >= a.rgt

11. 1 × SELECT `session_id` 
      FROM `qerl4_session`

12. 1 × SELECT id, rules 
      FROM `qerl4_viewlevels

13. 1 × SELECT folder AS type, element AS name, params 
      FROM qerl4_extensions

14. 1 × SELECT `data` 
      FROM `qerl4_session`

15. 1 × SELECT m.id, m.menutype, m.title, m.alias, m.note, m.path AS route, m.link, m.type, m.level, m.language,`m`.`browserNav`, m.access, m.params, m.home, m.img, m.template_style_id, m.component_id, m.parent_id,e.element as component 
      FROM qerl4_menu AS m 
      LEFT JOIN qerl4_extensions AS e 
      ON m.component_id = e.extension_id

16. 1 × SELECT id, home, template, s.params 
      FROM qerl4_template_styles as s 
      LEFT JOIN qerl4_extensions as e 
      ON e.element=s.template 
      AND e.type='template' 
      AND e.client_id=s.client_id

OTHER Tables:

1. 1 × SHOW FULL COLUMNS 
     FROM `qerl4_assets

2. 1 × UPDATE `qerl4_extensions` 
     SET `params` = '{\"mediaversion\":\"be8078ccbdd2fbe7755d0705d9e1c445\"}'

3. 1 × INSERT INTO `qerl4_session` (`session_id`, `client_id`, `time`) 
     VALUES  ('ai0u43mngpdok6prqcv6o1vfu3', 0, '1566395196'