| add_argument | Add a filter argument to a list |
| add_join_paths_to_query | Add Join Paths to Query |
| check_operator | Check validity of operator and values |
| connect_to_db | Connect to an SQLite database |
| discover_id_introduction_steps | Discover ID Introduction Steps |
| find_relevant_tables | Find relevant tables based on column name |
| get_argument_sequence | Get argument sequence based on argument relation |
| get_column_names | Get column names from database tables |
| get_filter_statement | Get Filter Statement |
| make_valid_sql | Create a valid SQL statement based on variable, operator, and values |
| precompute_table_join_paths | Precompute Table Join Paths |
| query_db | Query Database |
| return_id_name_from_table | Return ID column name from table name |
| return_table_name_from_id | Return table name from ID column name |