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
