PhabricatorSearchNgramsDestructionEngineExtension.php
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	<?php

	final class PhabricatorSearchNgramsDestructionEngineExtension
	extends PhabricatorDestructionEngineExtension {

	const EXTENSIONKEY = 'search.ngrams';

	public function getExtensionName() {
	return pht('Search Ngram');
	}

	public function canDestroyObject(
	PhabricatorDestructionEngine $engine,
	$object) {
	return ($object instanceof PhabricatorNgramsInterface);
	}

	public function destroyObject(
	PhabricatorDestructionEngine $engine,
	$object) {

	foreach ($object->newNgrams() as $ngram) {
	queryfx(
	$ngram->establishConnection('w'),
	'DELETE FROM %T WHERE objectID = %d',
	$ngram->getTableName(),
	$object->getID());
	}
	}

	}