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Request #68683 Allow individual filters to be removed
Submitted: 2014-12-29 12:16 UTC Modified: 2015-01-11 04:22 UTC
From: marcel at berteler dot co dot za Assigned:
Status: No Feedback Package: sphinx (PECL)
PHP Version: 5.4.36 OS: Linux
Private report: No CVE-ID: None
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From: marcel at berteler dot co dot za
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 [2014-12-29 12:16 UTC] marcel at berteler dot co dot za
When doing multiple queries with a few filters that all queries share it is really useful to be able to remove a specific filter. In order for this to work, the setFilter* functions should return the key of the internal array used to store the filters. An additional function ClearFilter which takes the array key as a parameter can then be used to clear a specific filter.

Test script:
// set various filters
$this->sphinxSearch->setFilter('facility_id', array($facility_id));

// apply additional filter to only include services without exceptions
$filterKey1 = $this->sphinxSearch->setFilter('exc', array(0));

// run first query
$servicesCorrectCount = $this->sphinxSearch->search($this->query);

// now remove those filters

// apply filter to only count services with exceptions
$filterKey2 = $this->sphinxSearch->setFilter('exc', array(1));

// run second query
$servicesExceptionCount = $this->sphinxSearch->search($this->query);


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 [2014-12-29 13:17 UTC]
-Status: Open +Status: Feedback
 [2014-12-29 13:17 UTC]
Since we use libsphinxclient, the filters are not stored using an array.
Instead, setFilter() calls sphinx_add_filter() function which returns bool (see sphinxclient.c in libsphinxclient).
In addition to this function, libsphinxclient provides sphinx_reset_filters() function, which is used in resetFilters() method.
There is no sphinx_remove_filter() function, unfortunately, therefore I don't think such function can be implemented in PHP extension.
 [2014-12-30 06:50 UTC] marcel at berteler dot co dot za
I understand now. The request to add these functions should therefore be directed to the sphinx team. I see that internally the libsphinxclient does keep track of the number of filters applied so in theory it must be possible to remove a specific filter if the libsphinxclient would return a filter index upon adding a filter.
 [2015-01-11 04:22 UTC] pecl-dev at lists dot php dot net
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