public function DatabaseSchema_sqlsrv::tableExists in Drupal driver for SQL Server and SQL Azure 7.2

Same name and namespace in other branches

1. 7.3 sqlsrv/schema.inc \DatabaseSchema_sqlsrv::tableExists()
2. 7 sqlsrv/schema.inc \DatabaseSchema_sqlsrv::tableExists()

Find if a table already exists. Results are cached, use $reset = TRUE to get a fresh copy.

Parameters

$table: Name of the table.

Return value

True if the table exists, false otherwise.

Overrides DatabaseSchema::tableExists

8 calls to DatabaseSchema_sqlsrv::tableExists()

DatabaseSchema_sqlsrv::addField in sqlsrv/schema.inc

Override DatabaseSchema::addField().

DatabaseSchema_sqlsrv::addIndex in sqlsrv/schema.inc

Override DatabaseSchema::addIndex().

DatabaseSchema_sqlsrv::addPrimaryKey in sqlsrv/schema.inc

Override DatabaseSchema::addPrimaryKey().

DatabaseSchema_sqlsrv::addUniqueKey in sqlsrv/schema.inc

Override DatabaseSchema::addUniqueKey().

DatabaseSchema_sqlsrv::createTable in sqlsrv/schema.inc

{@Inheritdoc}

... See full list

File

sqlsrv/schema.inc, line 382

Database schema code for Microsoft SQL Server database servers.

Class

DatabaseSchema_sqlsrv

Code

public function tableExists($table, $reset = FALSE) {
  if (empty($table)) {
    return FALSE;
  }

  // Do not cache temporary tables (#)
  if (!$reset && $table[0] != '#' && ($cache = fastcache::cache_get($table, 'tableExists'))) {
    return $cache->data;
  }

  // Temporary tables and regular tables cannot be verified in the same way.
  $query = NULL;
  if ($table[0] == '#') {
    $query = "SELECT 1 FROM tempdb.sys.tables WHERE name like '" . $this->connection
      ->prefixTables('{' . $table . '}') . "%'";
  }
  else {
    $query = "SELECT 1 FROM INFORMATION_SCHEMA.tables WHERE table_name = '" . $this->connection
      ->prefixTables('{' . $table . '}') . "'";
  }
  $exists = $this->connection
    ->query_direct($query)
    ->fetchField() !== FALSE;
  if ($table[0] != '#') {
    fastcache::cache_set($table, $exists, 'tableExists');
  }
  return $exists;
}