presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/BaseJdbcClient.java/BaseJdbcClient/listSchemasByLowerCase
class BaseJdbcClient:    protected Map<String, String> listSchemasByLowerCase(Connection connection)
    {
        return listSchemas(connection).stream()
                .collect(toImmutableMap(schemaName -> schemaName.toLowerCase(ENGLISH), schemaName -> schemaName));
    }