"Hmm... Is the SQL actually running?!" Is a bug. phab:T205214
Why is it show? Because the explain is like:
{
"rows": [
[
1,
"PRIMARY",
"comment",
"index",
null,
"comment_hash",
"4",
null,
266953357,
"Using where; Using index"
],
[
11,
"DEPENDENT SUBQUERY",
"logging",
"ref",
"type_time,log_comment_type,log_type_action",
"log_comment_type",
"8",
"enwiki.comment.comment_id",
185,
"Using where; Using index"
],
[
10,
"DEPENDENT SUBQUERY",
"revision_comment_temp",
"ref",
"PRIMARY,revcomment_rev,revcomment_comment_id",
"revcomment_comment_id",
"8",
"enwiki.comment.comment_id",
1,
"Using index"
],
[
10,
"DEPENDENT SUBQUERY",
"revision",
"eq_ref",
"PRIMARY",
"PRIMARY",
"4",
"enwiki.revision_comment_temp.revcomment_rev",
1,
"Using where"
],
[
9,
"DEPENDENT SUBQUERY",
"recentchanges",
"ref",
"rc_comment_deleted",
"rc_comment_deleted",
"8",
"enwiki.comment.comment_id",
1,
"Using where; Using index"
],
[
8,
"DEPENDENT SUBQUERY",
"protected_titles",
"ref",
"pt_reason_id",
"pt_reason_id",
"8",
"enwiki.comment.comment_id",
4,
"Using index"
],
[
7,
"DEPENDENT SUBQUERY",
"oldimage",
"ref",
"oi_description_deleted",
"oi_description_deleted",
"8",
"enwiki.comment.comment_id",
28,
"Using where; Using index"
],
[
6,
"DEPENDENT SUBQUERY",
"ipblocks",
"ref",
"ipb_reason_deleted",
"ipb_reason_deleted",
"9",
"enwiki.comment.comment_id,const",
32,
"Using index"
],
[
5,
"DEPENDENT SUBQUERY",
"filearchive",
"ref",
"fa_description_deleted",
"fa_description_deleted",
"8",
"enwiki.comment.comment_id",
124,
"Using where; Using index"
],
[
4,
"DEPENDENT SUBQUERY",
"filearchive",
"ref",
"fa_reason",
"fa_reason",
"8",
"enwiki.comment.comment_id",
405,
"Using index"
],
[
3,
"DEPENDENT SUBQUERY",
"image",
"ref",
"img_description_id",
"img_description_id",
"8",
"enwiki.comment.comment_id",
26,
"Using index"
]
],
"headers": [
"id",
"select_type",
"table",
"type",
"possible_keys",
"key",
"key_len",
"ref",
"rows",
"Extra"
]
}