Comments on: Post Meta http://dougal.gunters.org/blog/2004/02/26/post-meta/ WordPress, web development, and world domination. Sat, 11 Feb 2012 20:29:44 +0000 hourly 1 http://wordpress.org/?v=3.4-alpha-19719 By: Dougal http://dougal.gunters.org/blog/2004/02/26/post-meta/#comment-397 Dougal Mon, 01 Mar 2004 19:28:18 +0000 //?p=#comment-397 Yeah, I almost started to do a join, but I quickly saw that it was going go get really messy trying to do it that way. That's why I switched to just building a 'cache' variable with the metadata for the currently selected set of posts. It's only one extra query per page load, so it shouldn't be a big deal. I just have to wonder how well optimized MySQL's IN clause is when the $post_id_list gets big. Yeah, I almost started to do a join, but I quickly saw that it was going go get really messy trying to do it that way. That’s why I switched to just building a ‘cache’ variable with the metadata for the currently selected set of posts.

It’s only one extra query per page load, so it shouldn’t be a big deal. I just have to wonder how well optimized MySQL’s IN clause is when the $post_id_list gets big.

]]> By: Alex http://dougal.gunters.org/blog/2004/02/26/post-meta/#comment-391 Alex Sat, 28 Feb 2004 16:59:49 +0000 //?p=#comment-391 Oops, sorry was still stuck in my serialized thought process, a JOIN probably wouldn't work well since there is a one to many relationship there. Oops, sorry was still stuck in my serialized thought process, a JOIN probably wouldn’t work well since there is a one to many relationship there.

]]> By: Alex http://dougal.gunters.org/blog/2004/02/26/post-meta/#comment-389 Alex Fri, 27 Feb 2004 23:26:42 +0000 //?p=#comment-389 Was there a reason you decided not get it in the same query with a LEFT JOIN? Was there a reason you decided not get it in the same query with a LEFT JOIN?

]]> By: Dougal http://dougal.gunters.org/blog/2004/02/26/post-meta/#comment-388 Dougal Fri, 27 Feb 2004 13:54:26 +0000 //?p=#comment-388 I've added a new wp_postmeta database table. The structure is simple, just four fields: <code>meta_id, post_id, meta_key, meta_value</code>. The tricky part was converting that flat structure into a hierarchical struct. I build a $post_meta_cache object in wp-blog-header.php which contains the metadata for the currently selected set of posts. That way, each page view only requires one extra query to fetch the metadata. I’ve added a new wp_postmeta database table. The structure is simple, just four fields: meta_id, post_id, meta_key, meta_value. The tricky part was converting that flat structure into a hierarchical struct. I build a $post_meta_cache object in wp-blog-header.php which contains the metadata for the currently selected set of posts. That way, each page view only requires one extra query to fetch the metadata.

]]> By: Alex http://dougal.gunters.org/blog/2004/02/26/post-meta/#comment-386 Alex Thu, 26 Feb 2004 22:52:45 +0000 //?p=#comment-386 Dougal, are you using a serialized array/object for the meta? Dougal, are you using a serialized array/object for the meta?

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