WordPress databasefout: [The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay]
SELECT www3_posts.* FROM www3_posts WHERE 1=1 AND www3_posts.ID IN (30967,30969,31214,31216,31506,31074,30971,30973,30975,30977,30979,30981,30983,30986,30988,30990,31218,31220) AND www3_posts.post_type IN ('sfwd-lessons', 'sfwd-topic', 'sfwd-quiz') AND ((www3_posts.post_status = 'publish' OR www3_posts.post_status = 'future' OR www3_posts.post_status = 'draft' OR www3_posts.post_status = 'pending' OR www3_posts.post_status = 'private')) ORDER BY www3_posts.post_date DESC