public function DatabaseSchema_mysql::tableExists in Drupal 7

Check if a table exists.

Parameters

$table: The name of the table in drupal (no prefixing).

Return value

TRUE if the given table exists, otherwise FALSE.

Overrides DatabaseSchema::tableExists

6 calls to DatabaseSchema_mysql::tableExists()

DatabaseSchema_mysql::addField in includes/database/mysql/schema.inc

Add a new field to a table.

DatabaseSchema_mysql::addIndex in includes/database/mysql/schema.inc

Add an index.

DatabaseSchema_mysql::addPrimaryKey in includes/database/mysql/schema.inc

Add a primary key.

DatabaseSchema_mysql::addUniqueKey in includes/database/mysql/schema.inc

Add a unique key.

DatabaseSchema_mysql::dropTable in includes/database/mysql/schema.inc

Drop a table.

... See full list

File

includes/database/mysql/schema.inc, line 511

Database schema code for MySQL database servers.

Class

DatabaseSchema_mysql

Code

public function tableExists($table) {

  // The information_schema table is very slow to query under MySQL 5.0.
  // Instead, we try to select from the table in question.  If it fails,
  // the most likely reason is that it does not exist. That is dramatically
  // faster than using information_schema.
  // @link http://bugs.mysql.com/bug.php?id=19588
  // @todo: This override should be removed once we require a version of MySQL
  // that has that bug fixed.
  try {
    $this->connection
      ->queryRange("SELECT 1 FROM {" . $table . "}", 0, 1);
    return TRUE;
  } catch (Exception $e) {
    return FALSE;
  }
}