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phorge/src/applications/search/fulltextstorage/PhabricatorMySQLFulltextStorageEngine.php
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PhabricatorMySQLFulltextStorageEngine.php
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<?php
final class PhabricatorMySQLFulltextStorageEngine
extends PhabricatorFulltextStorageEngine {
private $fulltextTokens = array();
private $engineLimits;
public function getEngineIdentifier() {
return 'mysql';
}
public function getHostType() {
return new PhabricatorMySQLSearchHost($this);
}
public function reindexAbstractDocument(
PhabricatorSearchAbstractDocument $doc) {
$phid = $doc->getPHID();
if (!$phid) {
throw new Exception(pht('Document has no PHID!'));
}
$store = new PhabricatorSearchDocument();
$store->setPHID($doc->getPHID());
$store->setDocumentType($doc->getDocumentType());
$store->setDocumentTitle($doc->getDocumentTitle());
$store->setDocumentCreated($doc->getDocumentCreated());
$store->setDocumentModified($doc->getDocumentModified());
$store->replace();
$conn_w = $store->establishConnection('w');
$stemmer = new PhutilSearchStemmer();
$field_dao = new PhabricatorSearchDocumentField();
queryfx(
$conn_w,
'DELETE FROM %T WHERE phid = %s',
$field_dao->getTableName(),
$phid);
foreach ($doc->getFieldData() as $field) {
list($ftype, $corpus, $aux_phid) = $field;
$stemmed_corpus = $stemmer->stemCorpus($corpus);
queryfx(
$conn_w,
'INSERT INTO %T
(phid, phidType, field, auxPHID, corpus, stemmedCorpus) '.
'VALUES (%s, %s, %s, %ns, %s, %s)',
$field_dao->getTableName(),
$phid,
$doc->getDocumentType(),
$ftype,
$aux_phid,
$corpus,
$stemmed_corpus);
}
$sql = array();
foreach ($doc->getRelationshipData() as $relationship) {
list($rtype, $to_phid, $to_type, $time) = $relationship;
$sql[] = qsprintf(
$conn_w,
'(%s, %s, %s, %s, %d)',
$phid,
$to_phid,
$rtype,
$to_type,
$time);
}
$rship_dao = new PhabricatorSearchDocumentRelationship();
queryfx(
$conn_w,
'DELETE FROM %T WHERE phid = %s',
$rship_dao->getTableName(),
$phid);
if ($sql) {
queryfx(
$conn_w,
'INSERT INTO %T '.
'(phid, relatedPHID, relation, relatedType, relatedTime) '.
'VALUES %Q',
$rship_dao->getTableName(),
implode(', ', $sql));
}
}
public function executeSearch(PhabricatorSavedQuery $query) {
$table = new PhabricatorSearchDocument();
$document_table = $table->getTableName();
$conn = $table->establishConnection('r');
$subquery = $this->newFulltextSubquery($query, $conn);
$offset = (int)$query->getParameter('offset', 0);
$limit = (int)$query->getParameter('limit', 25);
// NOTE: We must JOIN the subquery in order to apply a limit.
$results = queryfx_all(
$conn,
'SELECT
documentPHID,
MAX(fieldScore) AS documentScore
FROM (%Q) query
JOIN %T root ON query.documentPHID = root.phid
GROUP BY documentPHID
ORDER BY documentScore DESC
LIMIT %d, %d',
$subquery,
$document_table,
$offset,
$limit);
return ipull($results, 'documentPHID');
}
private function newFulltextSubquery(
PhabricatorSavedQuery $query,
AphrontDatabaseConnection $conn) {
$field = new PhabricatorSearchDocumentField();
$field_table = $field->getTableName();
$document = new PhabricatorSearchDocument();
$document_table = $document->getTableName();
$select = array();
$select[] = 'document.phid AS documentPHID';
$join = array();
$where = array();
$title_field = PhabricatorSearchDocumentFieldType::FIELD_TITLE;
$title_boost = 1024;
$stemmer = new PhutilSearchStemmer();
$raw_query = $query->getParameter('query');
$raw_query = trim($raw_query);
if (strlen($raw_query)) {
$compiler = PhabricatorSearchDocument::newQueryCompiler()
->setStemmer($stemmer);
$tokens = $compiler->newTokens($raw_query);
list($min_length, $stopword_list) = $this->getEngineLimits($conn);
// Process all the parts of the user's query so we can show them which
// parts we searched for and which ones we ignored.
$fulltext_tokens = array();
foreach ($tokens as $key => $token) {
$fulltext_token = id(new PhabricatorFulltextToken())
->setToken($token);
$fulltext_tokens[$key] = $fulltext_token;
$value = $token->getValue();
// If the value is unquoted, we'll stem it in the query, so stem it
// here before performing filtering tests. See T12596.
if (!$token->isQuoted()) {
$value = $stemmer->stemToken($value);
}
if ($this->isShortToken($value, $min_length)) {
$fulltext_token->setIsShort(true);
continue;
}
if (isset($stopword_list[phutil_utf8_strtolower($value)])) {
$fulltext_token->setIsStopword(true);
continue;
}
}
$this->fulltextTokens = $fulltext_tokens;
// Remove tokens which aren't queryable from the query. This is mostly
// a workaround for the peculiar behaviors described in T12137.
foreach ($this->fulltextTokens as $key => $fulltext_token) {
if (!$fulltext_token->isQueryable()) {
unset($tokens[$key]);
}
}
if (!$tokens) {
throw new PhutilSearchQueryCompilerSyntaxException(
pht(
'All of your search terms are too short or too common to '.
'appear in the search index. Search for longer or more '.
'distinctive terms.'));
}
$queries = array();
$queries[] = $compiler->compileLiteralQuery($tokens);
$queries[] = $compiler->compileStemmedQuery($tokens);
$compiled_query = implode(' ', array_filter($queries));
} else {
$compiled_query = null;
}
if (strlen($compiled_query)) {
$select[] = qsprintf(
$conn,
'IF(field.field = %s, %d, 0) +
MATCH(corpus, stemmedCorpus) AGAINST (%s IN BOOLEAN MODE)
AS fieldScore',
$title_field,
$title_boost,
$compiled_query);
$join[] = qsprintf(
$conn,
'%T field ON field.phid = document.phid',
$field_table);
$where[] = qsprintf(
$conn,
'MATCH(corpus, stemmedCorpus) AGAINST (%s IN BOOLEAN MODE)',
$compiled_query);
if ($query->getParameter('field')) {
$where[] = qsprintf(
$conn,
'field.field = %s',
$field);
}
} else {
$select[] = qsprintf(
$conn,
'document.documentCreated AS fieldScore');
}
$exclude = $query->getParameter('exclude');
if ($exclude) {
$where[] = qsprintf(
$conn,
'document.phid != %s',
$exclude);
}
$types = $query->getParameter('types');
if ($types) {
if (strlen($compiled_query)) {
$where[] = qsprintf(
$conn,
'field.phidType IN (%Ls)',
$types);
}
$where[] = qsprintf(
$conn,
'document.documentType IN (%Ls)',
$types);
}
$join[] = $this->joinRelationship(
$conn,
$query,
'authorPHIDs',
PhabricatorSearchRelationship::RELATIONSHIP_AUTHOR);
$statuses = $query->getParameter('statuses', array());
$statuses = array_fuse($statuses);
$open_rel = PhabricatorSearchRelationship::RELATIONSHIP_OPEN;
$closed_rel = PhabricatorSearchRelationship::RELATIONSHIP_CLOSED;
$include_open = !empty($statuses[$open_rel]);
$include_closed = !empty($statuses[$closed_rel]);
if ($include_open && !$include_closed) {
$join[] = $this->joinRelationship(
$conn,
$query,
'statuses',
$open_rel,
true);
} else if ($include_closed && !$include_open) {
$join[] = $this->joinRelationship(
$conn,
$query,
'statuses',
$closed_rel,
true);
}
if ($query->getParameter('withAnyOwner')) {
$join[] = $this->joinRelationship(
$conn,
$query,
'withAnyOwner',
PhabricatorSearchRelationship::RELATIONSHIP_OWNER,
true);
} else if ($query->getParameter('withUnowned')) {
$join[] = $this->joinRelationship(
$conn,
$query,
'withUnowned',
PhabricatorSearchRelationship::RELATIONSHIP_UNOWNED,
true);
} else {
$join[] = $this->joinRelationship(
$conn,
$query,
'ownerPHIDs',
PhabricatorSearchRelationship::RELATIONSHIP_OWNER);
}
$join[] = $this->joinRelationship(
$conn,
$query,
'subscriberPHIDs',
PhabricatorSearchRelationship::RELATIONSHIP_SUBSCRIBER);
$join[] = $this->joinRelationship(
$conn,
$query,
'projectPHIDs',
PhabricatorSearchRelationship::RELATIONSHIP_PROJECT);
$join[] = $this->joinRelationship(
$conn,
$query,
'repository',
PhabricatorSearchRelationship::RELATIONSHIP_REPOSITORY);
$select = implode(', ', $select);
$join = array_filter($join);
foreach ($join as $key => $clause) {
$join[$key] = ' JOIN '.$clause;
}
$join = implode(' ', $join);
if ($where) {
$where = 'WHERE '.implode(' AND ', $where);
} else {
$where = '';
}
if (strlen($compiled_query)) {
$order = '';
} else {
// When not executing a query, order by document creation date. This
// is the default view in object browser dialogs, like "Close Duplicate".
$order = qsprintf(
$conn,
'ORDER BY document.documentCreated DESC');
}
return qsprintf(
$conn,
'SELECT %Q FROM %T document %Q %Q %Q LIMIT 1000',
$select,
$document_table,
$join,
$where,
$order);
}
protected function joinRelationship(
AphrontDatabaseConnection $conn,
PhabricatorSavedQuery $query,
$field,
$type,
$is_existence = false) {
$sql = qsprintf(
$conn,
'%T AS %C ON %C.phid = document.phid AND %C.relation = %s',
id(new PhabricatorSearchDocumentRelationship())->getTableName(),
$field,
$field,
$field,
$type);
if (!$is_existence) {
$phids = $query->getParameter($field, array());
if (!$phids) {
return null;
}
$sql .= qsprintf(
$conn,
' AND %C.relatedPHID in (%Ls)',
$field,
$phids);
}
return $sql;
}
public function indexExists() {
return true;
}
public function getIndexStats() {
return false;
}
public function getFulltextTokens() {
return $this->fulltextTokens;
}
private function getEngineLimits(AphrontDatabaseConnection $conn) {
if ($this->engineLimits === null) {
$this->engineLimits = $this->newEngineLimits($conn);
}
return $this->engineLimits;
}
private function newEngineLimits(AphrontDatabaseConnection $conn) {
// First, try InnoDB. Some database may not have both table engines, so
// selecting variables from missing table engines can fail and throw.
try {
$result = queryfx_one(
$conn,
'SELECT @@innodb_ft_min_token_size innodb_max,
@@innodb_ft_server_stopword_table innodb_stopword_config');
} catch (AphrontQueryException $ex) {
$result = null;
}
if ($result) {
$min_len = $result['innodb_max'];
$stopword_config = $result['innodb_stopword_config'];
if (preg_match('(/)', $stopword_config)) {
// If the setting is nonempty and contains a slash, query the
// table the user has configured.
$parts = explode('/', $stopword_config);
list($stopword_database, $stopword_table) = $parts;
} else {
// Otherwise, query the InnoDB default stopword table.
$stopword_database = 'INFORMATION_SCHEMA';
$stopword_table = 'INNODB_FT_DEFAULT_STOPWORD';
}
$stopwords = queryfx_all(
$conn,
'SELECT * FROM %T.%T',
$stopword_database,
$stopword_table);
$stopwords = ipull($stopwords, 'value');
$stopwords = array_fuse($stopwords);
return array($min_len, $stopwords);
}
// If InnoDB fails, try MyISAM.
$result = queryfx_one(
$conn,
'SELECT
@@ft_min_word_len myisam_max,
@@ft_stopword_file myisam_stopwords');
$min_len = $result['myisam_max'];
$file = $result['myisam_stopwords'];
if (preg_match('(/resources/sql/stopwords\.txt\z)', $file)) {
// If this is set to something that looks like the Phabricator
// stopword file, read that.
$file = 'stopwords.txt';
} else {
// Otherwise, just use the default stopwords. This might be wrong
// but we can't read the actual value dynamically and reading
// whatever file the variable is set to could be a big headache
// to get right from a security perspective.
$file = 'stopwords_myisam.txt';
}
$root = dirname(phutil_get_library_root('phabricator'));
$data = Filesystem::readFile($root.'/resources/sql/'.$file);
$stopwords = explode("\n", $data);
$stopwords = array_filter($stopwords);
$stopwords = array_fuse($stopwords);
return array($min_len, $stopwords);
}
private function isShortToken($value, $min_length) {
// NOTE: The engine tokenizes internally on periods, so terms in the form
// "ab.cd", where short substrings are separated by periods, do not produce
// any queryable tokens. These terms are meaningful if at least one
// substring is longer than the minimum length, like "example.py". See
// T12928. This also applies to words with intermediate apostrophes, like
// "to's".
$parts = preg_split('/[.\']+/', $value);
foreach ($parts as $part) {
if (phutil_utf8_strlen($part) >= $min_length) {
return false;
}
}
return true;
}
}

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