mysql - Add FULLTEXT index to WordPress `wp_posts` table? -


to build multisite search engine, trying make following modification wp_posts table found default in wordpress database.

alter table wp_posts add fulltext (post_content);

upon execution, seemingly unrelated error

error 1067 (42000): invalid default value 'post_date'

what going on here?

i running wordpress 4.7.5 , mysql 5.7.14. have verified the engine type myisam.


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