"additional_conditions",
"dbname",
"domain",
"expansion_limit",
"hosts",
"option_file",
"option_group",
"password",
"query",
"require_result_set",
"result_format",
"select_field",
"table",
"tls_CAfile",
"tls_CApath",
"tls_cert_file",
"tls_ciphers",
"tls_key_file",
"tls_verify_cert",
"user",
"where_field",