Build a field dependency graph from calculated fields

Creates a directed graph where edges point from input fields used in a formula to the calculated output field. Tokens are extracted from bracketed references like [Table].[Field] or [Field].

Usage

build_dependency_graph(fields_df)

Arguments

fields_df

A data frame with at least columns name and formula.

Value

An igraph directed graph where vertices are field names and edges represent dependencies (input → output).

Examples

fields <- tibble::tibble(
name = c("X_plus_Y", "Z"),
formula = c("[X] + [Y]", "[X_plus_Y] * 2")
)
g <- build_dependency_graph(fields)