dict_table_t::get_n_user_cols(): Get the number of user-specified columns, possibly including a hidden FTS_DOC_ID column.
dict_table_t::get_n_sys_cols(): Get the number of internal system columns.
dict_table_t::get_n_cols(): Get the number of all columns.
dict_table_t::get_col(): Get a column.
dict_table_t::get_col_name(): Get a column name.
dict_table_t::get_sys_col(): Get an internal system column.