Type Alias Plan 

pub type Plan = Vec<Vec<ColumnFilter>>;

Filter plan representation used by the expression compiler.

Invariant:

• The outer Vec represents an AND over clauses (every clause must pass).
• Each inner Vec represents a single clause, which is an OR over ColumnFilter items.

Example: [[A, B], [C]] means (A OR B) AND (C).

Aliased Type

pub struct Plan { /* private fields */ }