CREATE FUNCTION zhprs_getsharepath()
RETURNS text
AS 'MODULE_PATHNAME'
LANGUAGE C STRICT;

CREATE SCHEMA zhparser;
CREATE TABLE zhparser.zhprs_custom_word(word text primary key, tf float default '1.0', idf float default '1.0', attr char default '@', check(attr = '@' or attr = '!'));

CREATE FUNCTION sync_zhprs_custom_word() RETURNS void LANGUAGE plpgsql AS
$$
declare
	dict_path text;
	time_tag_path text;
	query text;
begin
	select zhprs_getsharepath() || '/tsearch_data/qc_dict_' || current_database() || '.txt' into dict_path;
	select zhprs_getsharepath() || '/tsearch_data/qc_dict_' || current_database() || '.tag' into time_tag_path;

	query = 'copy (select word, tf, idf, attr from zhparser.zhprs_custom_word) to ' || chr(39) || dict_path || chr(39) || ' encoding ' || chr(39) || 'utf8' || chr(39) ;
	execute query;
	query = 'copy (select now()) to ' || chr(39) || time_tag_path || chr(39) ;
	execute query;
end;
$$;

select sync_zhprs_custom_word();