public Schema::tableExists($table) Check if

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

public Schema::fieldExists($table, $column) Check

The database connection. Type:

Provides a base implementation for Database Schema. Hierarchy class \Drupal\Core\Database\

abstract public Schema::indexExists($table, $name) Checks

abstract public Schema::addUniqueKey($table, $name, $fields)

protected Schema::getPrefixInfo($table = 'default', $add_prefix = TRUE)

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

abstract public Schema::dropIndex($table, $name) Drop