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UpdateQuery_pgsql

  1. drupal
    1. 7 drupal/includes/database/pgsql/query.inc

Hierarchy

Properties

NameDescription
Query::$commentsAn array of comments that can be prepended to a query.
Query::$connectionThe connection object on which to run this query.
Query::$connectionKeyThe key of the connection object.
Query::$connectionTargetThe target of the connection object.
Query::$nextPlaceholderThe placeholder counter.
Query::$queryOptionsThe query options to pass on to the connection object.
UpdateQuery::$argumentsAn array of values to update to.
UpdateQuery::$conditionThe condition object for this query.
UpdateQuery::$expressionFieldsArray of fields to update to an expression in case of a duplicate record.
UpdateQuery::$fieldsAn array of fields that will be updated.
UpdateQuery::$tableThe table to update.

Functions & methods

NameDescription
Query::commentAdds a comment to the query.
Query::getCommentsReturns a reference to the comments array for the query.
Query::nextPlaceholderGets the next placeholder value for this query object. Overrides QueryPlaceholderInterface::nextPlaceholder
Query::__sleepImplements the magic __sleep function to disconnect from the database.
Query::__wakeupImplements the magic __wakeup function to reconnect to the database.
UpdateQuery::argumentsImplements QueryConditionInterface::arguments(). Overrides QueryConditionInterface::arguments
UpdateQuery::compileImplements QueryConditionInterface::compile(). Overrides QueryConditionInterface::compile
UpdateQuery::conditionImplements QueryConditionInterface::condition(). Overrides QueryConditionInterface::condition
UpdateQuery::conditionsImplements QueryConditionInterface::conditions(). Overrides QueryConditionInterface::conditions
UpdateQuery::existsImplements QueryConditionInterface::exists(). Overrides QueryConditionInterface::exists
UpdateQuery::expressionSpecifies fields to be updated as an expression.
UpdateQuery::fieldsAdds a set of field->value pairs to be updated.
UpdateQuery::isNotNullImplements QueryConditionInterface::isNotNull(). Overrides QueryConditionInterface::isNotNull
UpdateQuery::isNullImplements QueryConditionInterface::isNull(). Overrides QueryConditionInterface::isNull
UpdateQuery::notExistsImplements QueryConditionInterface::notExists(). Overrides QueryConditionInterface::notExists
UpdateQuery::whereImplements QueryConditionInterface::where(). Overrides QueryConditionInterface::where
UpdateQuery::__constructConstructs an UpdateQuery object. Overrides Query::__construct
UpdateQuery::__toStringImplements PHP magic __toString method to convert the query to a string. Overrides Query::__toString
UpdateQuery_pgsql::executeExecutes the UPDATE query. Overrides UpdateQuery::execute

File

drupal/includes/database/pgsql/query.inc, line 150
Query code for PostgreSQL embedded database engine.

View source
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();
  }
}

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