Companion

The columns of the base table and of _state, one row per commit (ClickHouseRows).

The columns of _events, one row per event.

The system columns _state_flat starts with, as _state has them.

The tables and views that several of types would share: prefixOf maps distinct names to one (order-item and order_item, Order and order, context a_b and aggregate c with context a and aggregate b_c), and one aggregate's table may be another's (order's _state_events is order_state's _events). By name, each with the aggregates that would share it; empty when there is none.

The names of every table and view of type, whether it keeps its history or not.

The names of type's tables start with <ctx>_<agg>, lower case, other characters than [a-z0-9_] as _.

The name of type's _state, its current state: one row per aggregate after FINAL, its newest commit's, with the access attributes after it, which a dataset bound to type reads its rows by.