DatabaseSchema_mysql::tableExists
public function DatabaseSchema_mysql::tableExists
public DatabaseSchema_mysql::tableExists($table)
Check if a table exists.
Parameters
$table: The name of the table in drupal (no prefixing).
Return value
TRUE if the given table exists, otherwise FALSE.
Overrides DatabaseSchema::tableExists
File
- includes/database/mysql/schema.inc, line 506
- Database schema code for MySQL database servers.
Class
Code
public function tableExists($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; } }
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https://api.drupal.org/api/drupal/includes!database!mysql!schema.inc/function/DatabaseSchema_mysql::tableExists/7.x