PHP Question2Answer MySQL query error 1247: Reference '(null)'

Tue, 11 Sep 2012 06:53:27 +0000

Tonight I got the following error message (found in error-log-file of my server):

[11-Sep-2012 00:29:02] PHP Question2Answer MySQL query error 1247: Reference '(null)' not supported (reference to group function) - Query: UPDATE qa_posts AS x, (SELECT parents.postid, parents.created AS qcreated, COALESCE(MAX(children.created), parents.created) as acreated, COUNT(children.postid) AS acount, parents.netvotes, parents.views FROM qa_posts AS parents LEFT JOIN qa_posts AS children ON parents.postid=children.parentid AND children.type='A' WHERE parents.postid>=388 AND parents.postid<=388 AND LEFT(parents.type, 1)='Q' GROUP BY postid) AS a SET x.hotness=(((TO_DAYS(a.qcreated)-734138)*86400.0+TIME_TO_SEC(a.qcreated))*100 + ((TO_DAYS(a.acreated)-734138)*86400.0+TIME_TO_SEC(a.acreated))*100 + (a.acount+0.0)*16000000 + (a.netvotes+0.0)*16000000 + (a.views+0.0+1)*400000), x.views=x.views+1, x.lastviewip=INET_ATON('79.234.237.160') WHERE x.postid=a.postid

What could that be? A bug?

Or a hacking attempt?

In the mysql query I see postid=388 and parentid=388, so these are the according db-entries:

postid

type

parentid

categoryid

catidpath1

catidpath2

catidpath3

acount

amaxvote

selchildid

closedbyid

userid

cookieid

createip

lastuserid

lastip

upvotes

downvotes

netvotes

lastviewip

views

hotness

flagcount

format

created

updated

updatetype

title

content

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PHP Question2Answer MySQL query error 1247: Reference '(null)'