These settings are available in system.settings and are autogenerated from the ClickHouse snapshot.
regexp_dict_allow_hyperscan
Allow regexp_tree dictionary using Hyperscan library.
regexp_dict_flag_case_insensitive
Use case-insensitive matching for a regexp_tree dictionary. Can be overridden in individual expressions with (?i) and (?-i).
regexp_dict_flag_dotall
Allow ‘.’ to match newline characters for a regexp_tree dictionary.