class SearchQuery

Same name in other branches
  1. 7.x modules/search/search.extender.inc \SearchQuery
  2. 9 core/modules/search/src/SearchQuery.php \Drupal\search\SearchQuery
  3. 9 core/tests/fixtures/database_drivers/module/corefake/src/Driver/Database/corefakeWithAllCustomClasses/SearchQuery.php \Drupal\corefake\Driver\Database\corefakeWithAllCustomClasses\SearchQuery
  4. 10 core/modules/search/src/SearchQuery.php \Drupal\search\SearchQuery
  5. 10 core/tests/fixtures/database_drivers/module/core_fake/src/Driver/Database/CoreFakeWithAllCustomClasses/SearchQuery.php \Drupal\core_fake\Driver\Database\CoreFakeWithAllCustomClasses\SearchQuery
  6. 11.x core/modules/search/src/SearchQuery.php \Drupal\search\SearchQuery
  7. 11.x core/tests/fixtures/database_drivers/module/core_fake/src/Driver/Database/CoreFakeWithAllCustomClasses/SearchQuery.php \Drupal\core_fake\Driver\Database\CoreFakeWithAllCustomClasses\SearchQuery

Search query extender and helper functions.

Performs a query on the full-text search index for a word or words.

This query is used by search plugins that use the search index (not all search plugins do, as some use a different searching mechanism). It assumes you have set up a query on the {search_index} table with alias 'i', and will only work if the user is searching for at least one "positive" keyword or phrase.

For efficiency, users of this query can run the prepareAndNormalize() method to figure out if there are any search results, before fully setting up and calling execute() to execute the query. The scoring expressions are not needed until the execute() step. However, it's not really necessary to do this, because this class's execute() method does that anyway.

During both the prepareAndNormalize() and execute() steps, there can be problems. Call getStatus() to figure out if the query is OK or not.

The query object is given the tag 'search_$type' and can be further extended with hook_query_alter().

Hierarchy

Expanded class hierarchy of SearchQuery

2 files declare their use of SearchQuery
HelpSearch.php in core/modules/help_topics/src/Plugin/Search/HelpSearch.php
NodeSearch.php in core/modules/node/src/Plugin/Search/NodeSearch.php

File

core/modules/search/src/SearchQuery.php, line 32

Namespace

Drupal\search
View source
class SearchQuery extends SelectExtender {
    
    /**
     * Indicates no positive keywords were in the search expression.
     *
     * Positive keywords are words that are searched for, as opposed to negative
     * keywords, which are words that are excluded. To count as a keyword, a
     * word must be at least
     * \Drupal::config('search.settings')->get('index.minimum_word_size')
     * characters.
     *
     * @see SearchQuery::getStatus()
     */
    const NO_POSITIVE_KEYWORDS = 1;
    
    /**
     * Indicates that part of the search expression was ignored.
     *
     * To prevent Denial of Service attacks, only
     * \Drupal::config('search.settings')->get('and_or_limit') expressions
     * (positive keywords, phrases, negative keywords) are allowed; this flag
     * indicates that expressions existed past that limit and they were removed.
     *
     * @see SearchQuery::getStatus()
     */
    const EXPRESSIONS_IGNORED = 2;
    
    /**
     * Indicates that lower-case "or" was in the search expression.
     *
     * The word "or" in lower case was found in the search expression. This
     * probably means someone was trying to do an OR search but used lower-case
     * instead of upper-case.
     *
     * @see SearchQuery::getStatus()
     */
    const LOWER_CASE_OR = 4;
    
    /**
     * Indicates that no positive keyword matches were found.
     *
     * @see SearchQuery::getStatus()
     */
    const NO_KEYWORD_MATCHES = 8;
    
    /**
     * The keywords and advanced search options that are entered by the user.
     *
     * @var string
     */
    protected $searchExpression;
    
    /**
     * The type of search (search type).
     *
     * This maps to the value of the type column in search_index, and is usually
     * equal to the machine-readable name of the plugin or the search page.
     *
     * @var string
     */
    protected $type;
    
    /**
     * Parsed-out positive and negative search keys.
     *
     * @var array
     */
    protected $keys = [
        'positive' => [],
        'negative' => [],
    ];
    
    /**
     * Indicates whether the query conditions are simple or complex (LIKE).
     *
     * @var bool
     */
    protected $simple = TRUE;
    
    /**
     * Conditions that are used for exact searches.
     *
     * This is always used for the second step in the query, but is not part of
     * the preparation step unless $this->simple is FALSE.
     *
     * @var Drupal\Core\Database\Query\ConditionInterface[]
     */
    protected $conditions;
    
    /**
     * Indicates how many matches for a search query are necessary.
     *
     * @var int
     */
    protected $matches = 0;
    
    /**
     * Array of positive search words.
     *
     * These words have to match against {search_index}.word.
     *
     * @var array
     */
    protected $words = [];
    
    /**
     * Multiplier to normalize the keyword score.
     *
     * This value is calculated by the preparation step, and is used as a
     * multiplier of the word scores to make sure they are between 0 and 1.
     *
     * @var float
     */
    protected $normalize = 0;
    
    /**
     * Indicates whether the preparation step has been executed.
     *
     * @var bool
     */
    protected $executedPrepare = FALSE;
    
    /**
     * A bitmap of status conditions, described in getStatus().
     *
     * @var int
     *
     * @see SearchQuery::getStatus()
     */
    protected $status = 0;
    
    /**
     * The word score expressions.
     *
     * @var array
     *
     * @see SearchQuery::addScore()
     */
    protected $scores = [];
    
    /**
     * Arguments for the score expressions.
     *
     * @var array
     */
    protected $scoresArguments = [];
    
    /**
     * The number of 'i.relevance' occurrences in score expressions.
     *
     * @var int
     */
    protected $relevance_count = 0;
    
    /**
     * Multipliers for score expressions.
     *
     * @var array
     */
    protected $multiply = [];
    
    /**
     * Sets the search query expression.
     *
     * @param string $expression
     *   A search string, which can contain keywords and options.
     * @param string $type
     *   The search type. This maps to {search_index}.type in the database.
     *
     * @return $this
     */
    public function searchExpression($expression, $type) {
        $this->searchExpression = $expression;
        $this->type = $type;
        // Add query tag.
        $this->addTag('search_' . $type);
        // Initialize conditions and status.
        $this->conditions = new Condition('AND');
        $this->status = 0;
        return $this;
    }
    
    /**
     * Parses the search query into SQL conditions.
     *
     * Sets up the following variables:
     * - $this->keys
     * - $this->words
     * - $this->conditions
     * - $this->simple
     * - $this->matches
     */
    protected function parseSearchExpression() {
        // Matches words optionally prefixed by a - sign. A word in this case is
        // something between two spaces, optionally quoted.
        preg_match_all('/ (-?)("[^"]+"|[^" ]+)/i', ' ' . $this->searchExpression, $keywords, PREG_SET_ORDER);
        if (count($keywords) == 0) {
            return;
        }
        // Classify tokens.
        $in_or = FALSE;
        $limit_combinations = \Drupal::config('search.settings')->get('and_or_limit');
        // The first search expression does not count as AND.
        $and_count = -1;
        $or_count = 0;
        foreach ($keywords as $match) {
            if ($or_count && $and_count + $or_count >= $limit_combinations) {
                // Ignore all further search expressions to prevent Denial-of-Service
                // attacks using a high number of AND/OR combinations.
                $this->status |= SearchQuery::EXPRESSIONS_IGNORED;
                break;
            }
            // Strip off phrase quotes.
            $phrase = FALSE;
            if ($match[2][0] == '"') {
                $match[2] = substr($match[2], 1, -1);
                $phrase = TRUE;
                $this->simple = FALSE;
            }
            // Simplify keyword according to indexing rules and external
            // preprocessors. Use same process as during search indexing, so it
            // will match search index.
            $words = search_simplify($match[2]);
            // Re-explode in case simplification added more words, except when
            // matching a phrase.
            $words = $phrase ? [
                $words,
            ] : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
            // Negative matches.
            if ($match[1] == '-') {
                $this->keys['negative'] = array_merge($this->keys['negative'], $words);
            }
            elseif ($match[2] == 'OR' && count($this->keys['positive'])) {
                $last = array_pop($this->keys['positive']);
                // Starting a new OR?
                if (!is_array($last)) {
                    $last = [
                        $last,
                    ];
                }
                $this->keys['positive'][] = $last;
                $in_or = TRUE;
                $or_count++;
                continue;
            }
            elseif ($match[2] == 'AND' || $match[2] == 'and') {
                continue;
            }
            else {
                if ($match[2] == 'or') {
                    // Lower-case "or" instead of "OR" is a warning condition.
                    $this->status |= SearchQuery::LOWER_CASE_OR;
                }
                if ($in_or) {
                    // Add to last element (which is an array).
                    $this->keys['positive'][count($this->keys['positive']) - 1] = array_merge($this->keys['positive'][count($this->keys['positive']) - 1], $words);
                }
                else {
                    $this->keys['positive'] = array_merge($this->keys['positive'], $words);
                    $and_count++;
                }
            }
            $in_or = FALSE;
        }
        // Convert keywords into SQL statements.
        $has_and = FALSE;
        $has_or = FALSE;
        // Positive matches.
        foreach ($this->keys['positive'] as $key) {
            // Group of ORed terms.
            if (is_array($key) && count($key)) {
                // If we had already found one OR, this is another one AND-ed with the
                // first, meaning it is not a simple query.
                if ($has_or) {
                    $this->simple = FALSE;
                }
                $has_or = TRUE;
                $has_new_scores = FALSE;
                $queryor = new Condition('OR');
                foreach ($key as $or) {
                    list($num_new_scores) = $this->parseWord($or);
                    $has_new_scores |= $num_new_scores;
                    $queryor->condition('d.data', "% {$or} %", 'LIKE');
                }
                if (count($queryor)) {
                    $this->conditions
                        ->condition($queryor);
                    // A group of OR keywords only needs to match once.
                    $this->matches += $has_new_scores > 0;
                }
            }
            else {
                $has_and = TRUE;
                list($num_new_scores, $num_valid_words) = $this->parseWord($key);
                $this->conditions
                    ->condition('d.data', "% {$key} %", 'LIKE');
                if (!$num_valid_words) {
                    $this->simple = FALSE;
                }
                // Each AND keyword needs to match at least once.
                $this->matches += $num_new_scores;
            }
        }
        if ($has_and && $has_or) {
            $this->simple = FALSE;
        }
        // Negative matches.
        foreach ($this->keys['negative'] as $key) {
            $this->conditions
                ->condition('d.data', "% {$key} %", 'NOT LIKE');
            $this->simple = FALSE;
        }
    }
    
    /**
     * Parses a word or phrase for parseQuery().
     *
     * Splits a phrase into words. Adds its words to $this->words, if it is not
     * already there. Returns a list containing the number of new words found,
     * and the total number of words in the phrase.
     */
    protected function parseWord($word) {
        $num_new_scores = 0;
        $num_valid_words = 0;
        // Determine the scorewords of this word/phrase.
        $split = explode(' ', $word);
        foreach ($split as $s) {
            $num = is_numeric($s);
            if ($num || mb_strlen($s) >= \Drupal::config('search.settings')->get('index.minimum_word_size')) {
                if (!isset($this->words[$s])) {
                    $this->words[$s] = $s;
                    $num_new_scores++;
                }
                $num_valid_words++;
            }
        }
        // Return matching snippet and number of added words.
        return [
            $num_new_scores,
            $num_valid_words,
        ];
    }
    
    /**
     * Prepares the query and calculates the normalization factor.
     *
     * After the query is normalized the keywords are weighted to give the results
     * a relevancy score. The query is ready for execution after this.
     *
     * Error and warning conditions can apply. Call getStatus() after calling
     * this method to retrieve them.
     *
     * @return bool
     *   TRUE if at least one keyword matched the search index; FALSE if not.
     */
    public function prepareAndNormalize() {
        $this->parseSearchExpression();
        $this->executedPrepare = TRUE;
        if (count($this->words) == 0) {
            // Although the query could proceed, there is no point in joining
            // with other tables and attempting to normalize if there are no
            // keywords present.
            $this->status |= SearchQuery::NO_POSITIVE_KEYWORDS;
            return FALSE;
        }
        // Build the basic search query: match the entered keywords.
        $or = new Condition('OR');
        foreach ($this->words as $word) {
            $or->condition('i.word', $word);
        }
        $this->condition($or);
        // Add keyword normalization information to the query.
        $this->join('search_total', 't', 'i.word = t.word');
        $this->condition('i.type', $this->type)
            ->groupBy('i.type')
            ->groupBy('i.sid');
        // If the query is simple, we should have calculated the number of
        // matching words we need to find, so impose that criterion. For non-
        // simple queries, this condition could lead to incorrectly deciding not
        // to continue with the full query.
        if ($this->simple) {
            $this->having('COUNT(*) >= :matches', [
                ':matches' => $this->matches,
            ]);
        }
        // Clone the query object to calculate normalization.
        $normalize_query = clone $this->query;
        // For complex search queries, add the LIKE conditions; if the query is
        // simple, we do not need them for normalization.
        if (!$this->simple) {
            $normalize_query->join('search_dataset', 'd', 'i.sid = d.sid AND i.type = d.type AND i.langcode = d.langcode');
            if (count($this->conditions)) {
                $normalize_query->condition($this->conditions);
            }
        }
        // Calculate normalization, which is the max of all the search scores for
        // positive keywords in the query. And note that the query could have other
        // fields added to it by the user of this extension.
        $normalize_query->addExpression('SUM(i.score * t.count)', 'calculated_score');
        $result = $normalize_query->range(0, 1)
            ->orderBy('calculated_score', 'DESC')
            ->execute()
            ->fetchObject();
        if (isset($result->calculated_score)) {
            $this->normalize = (double) $result->calculated_score;
        }
        if ($this->normalize) {
            return TRUE;
        }
        // If the normalization value was zero, that indicates there were no
        // matches to the supplied positive keywords.
        $this->status |= SearchQuery::NO_KEYWORD_MATCHES;
        return FALSE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function preExecute(SelectInterface $query = NULL) {
        if (!$this->executedPrepare) {
            $this->prepareAndNormalize();
        }
        if (!$this->normalize) {
            return FALSE;
        }
        return parent::preExecute($query);
    }
    
    /**
     * Adds a custom score expression to the search query.
     *
     * Score expressions are used to order search results. If no calls to
     * addScore() have taken place, a default keyword relevance score will be
     * used. However, if at least one call to addScore() has taken place, the
     * keyword relevance score is not automatically added.
     *
     * Note that you must use this method to add ordering to your searches, and
     * not call orderBy() directly, when using the SearchQuery extender. This is
     * because of the two-pass system the SearchQuery class uses to normalize
     * scores.
     *
     * @param string $score
     *   The score expression, which should evaluate to a number between 0 and 1.
     *   The string 'i.relevance' in a score expression will be replaced by a
     *   measure of keyword relevance between 0 and 1.
     * @param array $arguments
     *   Query arguments needed to provide values to the score expression.
     * @param float $multiply
     *   If set, the score is multiplied with this value. However, all scores
     *   with multipliers are then divided by the total of all multipliers, so
     *   that overall, the normalization is maintained.
     *
     * @return $this
     */
    public function addScore($score, $arguments = [], $multiply = FALSE) {
        if ($multiply) {
            $i = count($this->multiply);
            // Modify the score expression so it is multiplied by the multiplier,
            // with a divisor to renormalize. Note that the ROUND here is necessary
            // for PostgreSQL and SQLite in order to ensure that the :multiply_* and
            // :total_* arguments are treated as a numeric type, because the
            // PostgreSQL PDO driver sometimes puts values in as strings instead of
            // numbers in complex expressions like this.
            $score = "(ROUND(:multiply_{$i}, 4)) * COALESCE(({$score}), 0) / (ROUND(:total_{$i}, 4))";
            // Add an argument for the multiplier. The :total_$i argument is taken
            // care of in the execute() method, which is when the total divisor is
            // calculated.
            $arguments[':multiply_' . $i] = $multiply;
            $this->multiply[] = $multiply;
        }
        // Search scoring needs a way to include a keyword relevance in the score.
        // For historical reasons, this is done by putting 'i.relevance' into the
        // search expression. So, use string replacement to change this to a
        // calculated query expression, counting the number of occurrences so
        // in the execute() method we can add arguments.
        while (strpos($score, 'i.relevance') !== FALSE) {
            $pieces = explode('i.relevance', $score, 2);
            $score = implode('((ROUND(:normalization_' . $this->relevance_count . ', 4)) * i.score * t.count)', $pieces);
            $this->relevance_count++;
        }
        $this->scores[] = $score;
        $this->scoresArguments += $arguments;
        return $this;
    }
    
    /**
     * Executes the search.
     *
     * The complex conditions are applied to the query including score
     * expressions and ordering.
     *
     * Error and warning conditions can apply. Call getStatus() after calling
     * this method to retrieve them.
     *
     * @return \Drupal\Core\Database\StatementInterface|null
     *   A query result set containing the results of the query.
     */
    public function execute() {
        if (!$this->preExecute($this)) {
            return NULL;
        }
        // Add conditions to the query.
        $this->join('search_dataset', 'd', 'i.sid = d.sid AND i.type = d.type AND i.langcode = d.langcode');
        if (count($this->conditions)) {
            $this->condition($this->conditions);
        }
        // Add default score (keyword relevance) if there are not any defined.
        if (empty($this->scores)) {
            $this->addScore('i.relevance');
        }
        if (count($this->multiply)) {
            // Re-normalize scores with multipliers by dividing by the total of all
            // multipliers. The expressions were altered in addScore(), so here just
            // add the arguments for the total.
            $sum = array_sum($this->multiply);
            for ($i = 0; $i < count($this->multiply); $i++) {
                $this->scoresArguments[':total_' . $i] = $sum;
            }
        }
        // Add arguments for the keyword relevance normalization number.
        $normalization = 1.0 / $this->normalize;
        for ($i = 0; $i < $this->relevance_count; $i++) {
            $this->scoresArguments[':normalization_' . $i] = $normalization;
        }
        // Add all scores together to form a query field.
        $this->addExpression('SUM(' . implode(' + ', $this->scores) . ')', 'calculated_score', $this->scoresArguments);
        // If an order has not yet been set for this query, add a default order
        // that sorts by the calculated sum of scores.
        if (count($this->getOrderBy()) == 0) {
            $this->orderBy('calculated_score', 'DESC');
        }
        // Add query metadata.
        $this->addMetaData('normalize', $this->normalize)
            ->fields('i', [
            'type',
            'sid',
        ]);
        return $this->query
            ->execute();
    }
    
    /**
     * Builds the default count query for SearchQuery.
     *
     * Since SearchQuery always uses GROUP BY, we can default to a subquery. We
     * also add the same conditions as execute() because countQuery() is called
     * first.
     */
    public function countQuery() {
        if (!$this->executedPrepare) {
            $this->prepareAndNormalize();
        }
        // Clone the inner query.
        $inner = clone $this->query;
        // Add conditions to query.
        $inner->join('search_dataset', 'd', 'i.sid = d.sid AND i.type = d.type');
        if (count($this->conditions)) {
            $inner->condition($this->conditions);
        }
        // Remove existing fields and expressions, they are not needed for a count
        // query.
        $fields =& $inner->getFields();
        $fields = [];
        $expressions =& $inner->getExpressions();
        $expressions = [];
        // Add sid as the only field and count them as a subquery.
        $count = $this->connection
            ->select($inner->fields('i', [
            'sid',
        ]), NULL);
        // Add the COUNT() expression.
        $count->addExpression('COUNT(*)');
        return $count;
    }
    
    /**
     * Returns the query status bitmap.
     *
     * @return int
     *   A bitmap indicating query status. Zero indicates there were no problems.
     *   A non-zero value is a combination of one or more of the following flags:
     *   - SearchQuery::NO_POSITIVE_KEYWORDS
     *   - SearchQuery::EXPRESSIONS_IGNORED
     *   - SearchQuery::LOWER_CASE_OR
     *   - SearchQuery::NO_KEYWORD_MATCHES
     */
    public function getStatus() {
        return $this->status;
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
SearchQuery::$conditions protected property Conditions that are used for exact searches.
SearchQuery::$executedPrepare protected property Indicates whether the preparation step has been executed.
SearchQuery::$keys protected property Parsed-out positive and negative search keys.
SearchQuery::$matches protected property Indicates how many matches for a search query are necessary.
SearchQuery::$multiply protected property Multipliers for score expressions.
SearchQuery::$normalize protected property Multiplier to normalize the keyword score.
SearchQuery::$relevance_count protected property The number of &#039;i.relevance&#039; occurrences in score expressions.
SearchQuery::$scores protected property The word score expressions.
SearchQuery::$scoresArguments protected property Arguments for the score expressions.
SearchQuery::$searchExpression protected property The keywords and advanced search options that are entered by the user.
SearchQuery::$simple protected property Indicates whether the query conditions are simple or complex (LIKE).
SearchQuery::$status protected property A bitmap of status conditions, described in getStatus().
SearchQuery::$type protected property The type of search (search type).
SearchQuery::$words protected property Array of positive search words.
SearchQuery::addScore public function Adds a custom score expression to the search query.
SearchQuery::countQuery public function Builds the default count query for SearchQuery. Overrides SelectExtender::countQuery
SearchQuery::execute public function Executes the search. Overrides SelectExtender::execute
SearchQuery::EXPRESSIONS_IGNORED constant Indicates that part of the search expression was ignored.
SearchQuery::getStatus public function Returns the query status bitmap.
SearchQuery::LOWER_CASE_OR constant Indicates that lower-case &quot;or&quot; was in the search expression.
SearchQuery::NO_KEYWORD_MATCHES constant Indicates that no positive keyword matches were found.
SearchQuery::NO_POSITIVE_KEYWORDS constant Indicates no positive keywords were in the search expression.
SearchQuery::parseSearchExpression protected function Parses the search query into SQL conditions.
SearchQuery::parseWord protected function Parses a word or phrase for parseQuery().
SearchQuery::preExecute public function Generic preparation and validation for a SELECT query. Overrides SelectExtender::preExecute
SearchQuery::prepareAndNormalize public function Prepares the query and calculates the normalization factor.
SearchQuery::searchExpression public function Sets the search query expression.
SelectExtender::$connection protected property The connection object on which to run this query.
SelectExtender::$placeholder protected property The placeholder counter.
SelectExtender::$query protected property The Select query object we are extending/decorating.
SelectExtender::$uniqueIdentifier protected property A unique identifier for this query object.
SelectExtender::addExpression public function Adds an expression to the list of &quot;fields&quot; to be SELECTed. Overrides SelectInterface::addExpression
SelectExtender::addField public function Adds a field to the list to be SELECTed. Overrides SelectInterface::addField
SelectExtender::addJoin public function Join against another table in the database. Overrides SelectInterface::addJoin
SelectExtender::addMetaData public function Adds additional metadata to the query. Overrides AlterableInterface::addMetaData
SelectExtender::addTag public function Adds a tag to a query. Overrides AlterableInterface::addTag
SelectExtender::alwaysFalse public function Sets a condition that is always false. Overrides ConditionInterface::alwaysFalse
SelectExtender::andConditionGroup public function Creates a new group of conditions ANDed together. Overrides ConditionInterface::andConditionGroup
SelectExtender::arguments public function Gets a complete list of all values to insert into the prepared statement. Overrides ConditionInterface::arguments
SelectExtender::compile public function Compiles the saved conditions for later retrieval. Overrides ConditionInterface::compile
SelectExtender::compiled public function Check whether a condition has been previously compiled. Overrides ConditionInterface::compiled
SelectExtender::condition public function Helper function: builds the most common conditional clauses. Overrides ConditionInterface::condition
SelectExtender::conditionGroupFactory public function Creates an object holding a group of conditions. Overrides ConditionInterface::conditionGroupFactory
SelectExtender::conditions public function Gets the, possibly nested, list of conditions in this conditional clause. Overrides ConditionInterface::conditions 1
SelectExtender::distinct public function Sets this query to be DISTINCT. Overrides SelectInterface::distinct
SelectExtender::escapeField public function Escapes a field name string. Overrides SelectInterface::escapeField
SelectExtender::escapeLike public function Escapes characters that work as wildcard characters in a LIKE pattern. Overrides SelectInterface::escapeLike
SelectExtender::exists public function Sets a condition that the specified subquery returns values. Overrides ConditionInterface::exists
SelectExtender::extend public function Enhance this object by wrapping it in an extender object. Overrides ExtendableInterface::extend
SelectExtender::fields public function Add multiple fields from the same table to be SELECTed. Overrides SelectInterface::fields
SelectExtender::forUpdate public function Add FOR UPDATE to the query. Overrides SelectInterface::forUpdate
SelectExtender::getArguments public function Compiles and returns an associative array of the arguments for this prepared statement. Overrides SelectInterface::getArguments
SelectExtender::getExpressions public function Returns a reference to the expressions array for this query. Overrides SelectInterface::getExpressions
SelectExtender::getFields public function Returns a reference to the fields array for this query. Overrides SelectInterface::getFields
SelectExtender::getGroupBy public function Returns a reference to the group-by array for this query. Overrides SelectInterface::getGroupBy
SelectExtender::getMetaData public function Retrieves a given piece of metadata. Overrides AlterableInterface::getMetaData
SelectExtender::getOrderBy public function Returns a reference to the order by array for this query. Overrides SelectInterface::getOrderBy
SelectExtender::getTables public function Returns a reference to the tables array for this query. Overrides SelectInterface::getTables
SelectExtender::getUnion public function Returns a reference to the union queries for this query. This include
queries for UNION, UNION ALL, and UNION DISTINCT.
Overrides SelectInterface::getUnion
SelectExtender::groupBy public function Groups the result set by the specified field. Overrides SelectInterface::groupBy
SelectExtender::hasAllTags public function Determines if a given query has all specified tags. Overrides AlterableInterface::hasAllTags
SelectExtender::hasAnyTag public function Determines if a given query has any specified tag. Overrides AlterableInterface::hasAnyTag
SelectExtender::hasTag public function Determines if a given query has a given tag. Overrides AlterableInterface::hasTag
SelectExtender::having public function Adds an arbitrary HAVING clause to the query. Overrides SelectInterface::having
SelectExtender::havingArguments public function Gets a list of all values to insert into the HAVING clause. Overrides SelectInterface::havingArguments
SelectExtender::havingCompile public function Compiles the HAVING clause for later retrieval. Overrides SelectInterface::havingCompile
SelectExtender::havingCondition public function Helper function to build most common HAVING conditional clauses. Overrides SelectInterface::havingCondition
SelectExtender::havingConditions public function Gets a list of all conditions in the HAVING clause. Overrides SelectInterface::havingConditions
SelectExtender::havingExists public function Sets a HAVING condition that the specified subquery returns values. Overrides SelectInterface::havingExists
SelectExtender::havingIsNotNull public function Sets a condition in the HAVING clause that the specified field be NOT NULL. Overrides SelectInterface::havingIsNotNull
SelectExtender::havingIsNull public function Sets a condition in the HAVING clause that the specified field be NULL. Overrides SelectInterface::havingIsNull
SelectExtender::havingNotExists public function Sets a HAVING condition that the specified subquery returns no values. Overrides SelectInterface::havingNotExists
SelectExtender::innerJoin public function Inner Join against another table in the database. Overrides SelectInterface::innerJoin
SelectExtender::isNotNull public function Sets a condition that the specified field be NOT NULL. Overrides ConditionInterface::isNotNull
SelectExtender::isNull public function Sets a condition that the specified field be NULL. Overrides ConditionInterface::isNull
SelectExtender::isPrepared public function Indicates if preExecute() has already been called on that object. Overrides SelectInterface::isPrepared
SelectExtender::join public function Default Join against another table in the database. Overrides SelectInterface::join
SelectExtender::leftJoin public function Left Outer Join against another table in the database. Overrides SelectInterface::leftJoin
SelectExtender::nextPlaceholder public function Returns the next placeholder ID for the query. Overrides PlaceholderInterface::nextPlaceholder
SelectExtender::notExists public function Sets a condition that the specified subquery returns no values. Overrides ConditionInterface::notExists
SelectExtender::orConditionGroup public function Creates a new group of conditions ORed together. Overrides ConditionInterface::orConditionGroup
SelectExtender::orderBy public function Orders the result set by a given field. Overrides SelectInterface::orderBy
SelectExtender::orderRandom public function Orders the result set by a random value. Overrides SelectInterface::orderRandom
SelectExtender::range public function Restricts a query to a given range in the result set. Overrides SelectInterface::range
SelectExtender::rightJoin public function Right Outer Join against another table in the database. Overrides SelectInterface::rightJoin
SelectExtender::union public function Add another Select query to UNION to this one. Overrides SelectInterface::union
SelectExtender::uniqueIdentifier public function Returns a unique identifier for this object. Overrides PlaceholderInterface::uniqueIdentifier
SelectExtender::where public function Adds an arbitrary WHERE clause to the query. Overrides ConditionInterface::where
SelectExtender::__call public function Magic override for undefined methods.
SelectExtender::__clone public function Clone magic method. Overrides SelectInterface::__clone
SelectExtender::__construct public function 2
SelectExtender::__toString public function Returns a string representation of how the query will be executed in SQL. Overrides SelectInterface::__toString

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.