CRM-21224 reinstate use of limit on dedupe searches

[eileenmcnaughton]

Overview

For perfomance reasons a site might want to put limit=5000 in the url of dedupe find. This means only the first 5000 contacts will be checked for dupes & can prevent runaway queries. It can be used in conjunction with other critieria. It limits the number of contacts searched, not the number of matches found. A recent bug fix tidied up some function calls but did not include passing this parameter on appropriately

Before

limit in url is ignored - e.g civicrm/contact/dedupefind?reset=1&action=update&rgid=4&gid=&limit=50000&context=conflicts

After

Code loves & cares for limit paramter

Technical Details

#11030 got too complex - taken from there.

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• CRM-21224: Dedupe searches dropping limit

[MegaphoneJon]

I'd like to label this feature as "Needs Documentation" :)

[eileenmcnaughton]

Yep it does - although I think the reason it's mostly hidden at the moment was because we have been getting back to extending it & making it clearer