public Schema::addField($table, $field, $spec, $keys_new = array())

protected Schema::shortenIndex(&$index)

protected Schema::buildTableNameCondition($table_name, $operator = '='

public Schema::changeField($table, $field, $field_new, $spec, $keys_new

protected Schema::createKeySql($fields)

List of MySQL string types. Type:

public Schema::prepareComment($comment, $length = NULL)

Maximum length of a table comment in MySQL. File core/lib/Drupal/Core/Database/Driver/mysql/Schema.php

public Schema::getFieldTypeMap() Returns

public Schema::addPrimaryKey($table, $fields)