$conf, $runtime; function_exists('chdir') AND chdir(APP_PATH); $r = 'mysql' == $conf['cache']['type'] ? website_set('runtime', $runtime) : cache_set('runtime', $runtime); } function runtime_truncate() { global $conf; 'mysql' == $conf['cache']['type'] ? website_set('runtime', '') : cache_delete('runtime'); } register_shutdown_function('runtime_save'); ?>post meta - What type of index should I use for postmeta?|Programmer puzzle solving

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post meta - What type of index should I use for postmeta?

matteradmin2025-06-28 02:27:039PV0评论

I already added a composite index but it still took 5 seconds to finish these 2 queries.

SELECT COUNT( DISTINCT( wpp.id ) ) 
FROM `wpdgls_posts` wpp JOIN `wpdgls_postmeta` wpm ON wpp.id = wpm.post_id
WHERE wpm.meta_key = '_form_id' AND wpm.meta_value = '14' ;

SELECT COUNT( DISTINCT( wpp.id ) ) 
FROM `wpdgls_posts` wpp JOIN `wpdgls_postmeta` wpm ON   wpp.id = wpm.post_id
WHERE wpm.meta_key = '_form_id' AND wpm.meta_value = '14' ;

Here are my index:

KEY `post_id` (`post_id`),
KEY `meta_key` (`meta_key`(191)),
KEY `meta_value` (`meta_value`(255)),
KEY `wp_meta` (`post_id`,`meta_key`,`meta_value`(8))

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post meta - What type of index should I use for postmeta?

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