abstract class Query

Base class for query builders.

Note that query builders use PHP's magic __toString() method to compile the query object into a prepared statement.

Hierarchy

Expanded class hierarchy of Query

Related topics

Database abstraction layer
Allow the use of different database servers using the same code base.

File

includes/database/query.inc, line 275
Non-specific Database query code. Used by all engines.

Members

Name Modifiers Type Description
Query::$comments protected property An array of comments that can be prepended to a query.
Query::$connection protected property The connection object on which to run this query.
Query::$connectionKey protected property The key of the connection object.
Query::$connectionTarget protected property The target of the connection object.
Query::$nextPlaceholder protected property The placeholder counter.
Query::$queryOptions protected property The query options to pass on to the connection object.
Query::$uniqueIdentifier protected property A unique identifier for this query object.
Query::comment public function Adds a comment to the query.
Query::execute abstract protected function Runs the query against the database.
Query::getComments public function Returns a reference to the comments array for the query.
Query::nextPlaceholder public function Gets the next placeholder value for this query object. Overrides QueryPlaceholderInterface::nextPlaceholder
Query::uniqueIdentifier public function Returns a unique identifier for this object. Overrides QueryPlaceholderInterface::uniqueIdentifier
Query::__clone public function Implements the magic __clone function.
Query::__construct public function Constructs a Query object.
Query::__sleep public function Implements the magic __sleep function to disconnect from the database.
Query::__toString abstract public function Implements PHP magic __toString method to convert the query to a string.
Query::__wakeup public function Implements the magic __wakeup function to reconnect to the database.

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https://api.drupal.org/api/drupal/includes!database!query.inc/class/Query/7.x