arch.txt

1. Declaration initializer
    User declaration -> Usable meta information structure
7. + Record
2. Transaction storage
3. Tasks loop
    while(@tasks) {
        select task via plugin
        run task & get from it next tasks
    }
    return result of first task
4. Task base class ->run:
    return self & fetch task if no record in trx storage
5. Fetch task ->run:
    base run
    return record from trx storage
6. Update task ->run:
    record ->update
    create calc task for each depend field in record who affected this update
    create m13n task for each link from any table to affected field or using affected field in matches
7. Materialization (m13n) task ->run:
    return self & fetch task if no linker record in trx storage
    get value from linked record and gen update task about set this value on self record

Match ([a=b,c=d])
	Все поля отсортированы на этапе декларации структуры или получения запроса снаружи
	Хеш, т.к. поля уникальны

table
	name
	fields
		name
		restrictions: datatype, vals,..
		fieldtype:
			user data
			expression
				used fields
			link (materializable)
				ext_table
				ext_field
				match conds
					ext_field
					op
					int_field
	selections
		fields to select
		match conds
			field
			op
			value
		order fields

computed table
	agregat
		source table
		filter conds
		fields (can use expressions with agregat functions)
		group fields
	union
		source tables
		fields
	join ...