cb_intersect_domain_values: Intersect two domain values for a filter type

In cohortBuilder: Data Source Agnostic Filtering Tools

Intersect two domain values for a filter type

Description

Combines two already-computed domain values (not value-vs-domain) into their intersection, dispatching on filter type. Used by '"filter"'-mode domain propagation when the same logical filter appears in more than one upstream step and its effective domains must be combined. Unlike [cb_intersect_domain()], this never emits trimming messages.

Usage

cb_intersect_domain_values(filter, ...)

Arguments

filter	S7 filter object (used for type dispatch only).
...	Additional arguments. Methods receive two domain values 'a' and 'b' to intersect (either may be 'NULL').

Value

The intersected domain value, or 'NULL'.

cohortBuilder documentation built on July 3, 2026, 9:07 a.m.