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MySQL supports the ORDER BY clause on DELETE statements for use with the LIMIT clause to choose which rows are deleted. PostgreSQL does not support this clause, which leads to errors such as: Error running : DELETE FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'display_type' AND ((wp_posts.post_status <> 'trash' AND wp_posts.post_status <> 'auto-draft')) ORDER BY wp_posts.post_date DESC ---- converted to ---- DELETE FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'display_type' AND ((wp_posts.post_status <> 'trash' AND wp_posts.post_status <> 'auto-draft')) ORDER BY wp_posts.post_date DESC ----> ERROR: syntax error at or near "ORDER" LINE 1: ...rash' AND wp_posts.post_status <> 'auto-draft')) ORDER BY w... When the ORDER BY clause is specified without a LIMIT clause, as it is in the above error, it does not have any effect that I am aware of (due to how transactions are handled). In these cases, we remove the ORDER BY clause to avoid the error. Signed-off-by: Kevin Locke <kevin@kevinlocke.name>