protected function DatabaseSchema_mysql::createTableSql in Drupal 7

Generate SQL to create a new table from a Drupal schema definition.

Parameters

$name: The name of the table to create.

$table: A Schema API table definition array.

Return value

An array of SQL statements to create the table.

File

includes/database/mysql/schema.inc, line 83

Database schema code for MySQL database servers.

Class

DatabaseSchema_mysql

Code

protected function createTableSql($name, $table) {
  $info = $this->connection
    ->getConnectionOptions();

  // Provide defaults if needed.
  $table += array(
    'mysql_engine' => 'InnoDB',
    // Allow the default charset to be overridden in settings.php.
    'mysql_character_set' => $this->connection
      ->utf8mb4IsActive() ? 'utf8mb4' : 'utf8',
  );
  $sql = "CREATE TABLE {" . $name . "} (\n";

  // Add the SQL statement for each field.
  foreach ($table['fields'] as $field_name => $field) {
    $sql .= $this
      ->createFieldSql($field_name, $this
      ->processField($field)) . ", \n";
  }

  // Process keys & indexes.
  $keys = $this
    ->createKeysSql($table);
  if (count($keys)) {
    $sql .= implode(", \n", $keys) . ", \n";
  }

  // Remove the last comma and space.
  $sql = substr($sql, 0, -3) . "\n) ";
  $sql .= 'ENGINE = ' . $table['mysql_engine'] . ' DEFAULT CHARACTER SET ' . $table['mysql_character_set'];

  // By default, MySQL uses the default collation for new tables, which is
  // 'utf8_general_ci' for utf8. If an alternate collation has been set, it
  // needs to be explicitly specified.
  // @see DatabaseConnection_mysql
  if (!empty($info['collation'])) {
    $sql .= ' COLLATE ' . $info['collation'];
  }

  // The row format needs to be either DYNAMIC or COMPRESSED in order to allow
  // for the innodb_large_prefix setting to take effect, see
  // https://dev.mysql.com/doc/refman/5.6/en/create-table.html
  if ($this->connection
    ->utf8mb4IsActive()) {
    $sql .= ' ROW_FORMAT=DYNAMIC';
  }

  // Add table comment.
  if (!empty($table['description'])) {
    $sql .= ' COMMENT ' . $this
      ->prepareComment($table['description'], self::COMMENT_MAX_TABLE);
  }
  return array(
    $sql,
  );
}