class UpdateQuery_pgsql in Drupal 7

Hierarchy

• class \Query implements QueryPlaceholderInterface
  • class \UpdateQuery implements QueryConditionInterface
    • class \UpdateQuery_pgsql

Related topics

Database abstraction layer

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

File

includes/database/pgsql/query.inc, line 151

Query code for PostgreSQL embedded database engine.

class UpdateQuery_pgsql extends UpdateQuery {
  public function execute() {
    $max_placeholder = 0;
    $blobs = array();
    $blob_count = 0;

    // Because we filter $fields the same way here and in __toString(), the
    // placeholders will all match up properly.
    $stmt = $this->connection
      ->prepareQuery((string) $this);

    // Fetch the list of blobs and sequences used on that table.
    $table_information = $this->connection
      ->schema()
      ->queryTableInformation($this->table);

    // Expressions take priority over literal fields, so we process those first
    // and remove any literal fields that conflict.
    $fields = $this->fields;
    $expression_fields = array();
    foreach ($this->expressionFields as $field => $data) {
      if (!empty($data['arguments'])) {
        foreach ($data['arguments'] as $placeholder => $argument) {

          // We assume that an expression will never happen on a BLOB field,
          // which is a fairly safe assumption to make since in most cases
          // it would be an invalid query anyway.
          $stmt
            ->bindParam($placeholder, $data['arguments'][$placeholder]);
        }
      }
      unset($fields[$field]);
    }
    foreach ($fields as $field => $value) {
      $placeholder = ':db_update_placeholder_' . $max_placeholder++;
      if (isset($table_information->blob_fields[$field])) {
        $blobs[$blob_count] = fopen('php://memory', 'a');
        fwrite($blobs[$blob_count], $value);
        rewind($blobs[$blob_count]);
        $stmt
          ->bindParam($placeholder, $blobs[$blob_count], PDO::PARAM_LOB);
        ++$blob_count;
      }
      else {
        $stmt
          ->bindParam($placeholder, $fields[$field]);
      }
    }
    if (count($this->condition)) {
      $this->condition
        ->compile($this->connection, $this);
      $arguments = $this->condition
        ->arguments();
      foreach ($arguments as $placeholder => $value) {
        $stmt
          ->bindParam($placeholder, $arguments[$placeholder]);
      }
    }
    $options = $this->queryOptions;
    $options['already_prepared'] = TRUE;
    $this->connection
      ->query($stmt, $options);
    return $stmt
      ->rowCount();
  }

}

Members

Name	Modifiers	Type	Description	Overrides
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::$uniqueIdentifier	protected	property	A unique identifier for this query object.
Query::comment	public	function	Adds a comment to the query.
Query::getComments	public	function	Returns a reference to the comments array for the query.
Query::nextPlaceholder	public	function	Gets the next placeholder value for this query object. Overrides QueryPlaceholderInterface::nextPlaceholder
Query::uniqueIdentifier	public	function	Returns a unique identifier for this object. Overrides QueryPlaceholderInterface::uniqueIdentifier
Query::__clone	public	function	Implements the magic __clone function.	1
Query::__sleep	public	function	Implements the magic __sleep function to disconnect from the database.
Query::__wakeup	public	function	Implements the magic __wakeup function to reconnect to the database.
UpdateQuery::$arguments	protected	property	An array of values to update to.
UpdateQuery::$condition	protected	property	The condition object for this query.
UpdateQuery::$expressionFields	protected	property	Array of fields to update to an expression in case of a duplicate record.
UpdateQuery::$fields	protected	property	An array of fields that will be updated.
UpdateQuery::$table	protected	property	The table to update.
UpdateQuery::arguments	public	function	Implements QueryConditionInterface::arguments(). Overrides QueryConditionInterface::arguments
UpdateQuery::compile	public	function	Implements QueryConditionInterface::compile(). Overrides QueryConditionInterface::compile
UpdateQuery::compiled	public	function	Implements QueryConditionInterface::compiled(). Overrides QueryConditionInterface::compiled
UpdateQuery::condition	public	function	Implements QueryConditionInterface::condition(). Overrides QueryConditionInterface::condition
UpdateQuery::conditions	public	function	Implements QueryConditionInterface::conditions(). Overrides QueryConditionInterface::conditions
UpdateQuery::exists	public	function	Implements QueryConditionInterface::exists(). Overrides QueryConditionInterface::exists
UpdateQuery::expression	public	function	Specifies fields to be updated as an expression.
UpdateQuery::fields	public	function	Adds a set of field->value pairs to be updated.
UpdateQuery::isNotNull	public	function	Implements QueryConditionInterface::isNotNull(). Overrides QueryConditionInterface::isNotNull
UpdateQuery::isNull	public	function	Implements QueryConditionInterface::isNull(). Overrides QueryConditionInterface::isNull
UpdateQuery::notExists	public	function	Implements QueryConditionInterface::notExists(). Overrides QueryConditionInterface::notExists
UpdateQuery::where	public	function	Implements QueryConditionInterface::where(). Overrides QueryConditionInterface::where
UpdateQuery::__construct	public	function	Constructs an UpdateQuery object. Overrides Query::__construct
UpdateQuery::__toString	public	function	Implements PHP magic __toString method to convert the query to a string. Overrides Query::__toString	1
UpdateQuery_pgsql::execute	public	function	Executes the UPDATE query. Overrides UpdateQuery::execute