TYPO3 Core

Example of use in TypoScript (not very realistic, but it works correctly):
10 = CONTENT
10 {
table = tt_news
select {
selectFields = title,uid
pidInList = 4
where = title > ###whatever###
markers {
whatever.data = GP:first
}
}
}

Version 3 of patch attached.

i added a diff for the test only.

i introduced the option markers.commaSeparatedList = 1 in the test case, but do not know, if you will implement it that way

almost ;-)
I made commaSeparatedList a property of a marker (that way you can have one marker value with a comma which is not a comma separated list and another which is):
markers {
first.value = one,two
second.value = one,two
second.commaSeparatedList = 1
}

first : 'one,two'
second : 'one','two'

committed to trunk rev 7353