public function DatabaseSchema::tableExists

1 schema.inc public DatabaseSchema::tableExists($table)

Check if a table exists.

Parameters

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

Return value

bool: TRUE if the given table exists, otherwise FALSE.

7 calls to DatabaseSchema::tableExists()

DatabaseSchema::createTable in core/includes/database/schema.inc: Create a new table from a Backdrop table definition.
DatabaseSchema_mysql::addField in core/includes/database/mysql/schema.inc: Add a new field to a table.
DatabaseSchema_mysql::addIndex in core/includes/database/mysql/schema.inc: Add an index.
DatabaseSchema_mysql::addPrimaryKey in core/includes/database/mysql/schema.inc: Add a primary key.
DatabaseSchema_mysql::addUniqueKey in core/includes/database/mysql/schema.inc: Add a unique key.

... See full list

File

core/includes/database/schema.inc, line 325: Generic Database schema code.

Class

DatabaseSchema: Base class for database schema definitions.

Code

public function tableExists($table) {
  $condition = $this->buildTableNameCondition($table);
  $condition->compile($this->connection, $this);
  // Normally, we would heartily discourage the use of string
  // concatenation for conditionals like this however, we
  // couldn't use db_select() here because it would prefix
  // information_schema.tables and the query would fail.
  // Don't use {} around information_schema.tables table.
  return (bool) $this->connection->query("SELECT 1 FROM information_schema.tables WHERE " . (string) $condition, $condition->arguments())->fetchField();
}