datafusion_expr::utils

Function exprlist_to_columns

Source 
pub fn exprlist_to_columns(
    expr: &[Expr],
    accum: &mut HashSet<Column>,
) -> Result<()>
👎Deprecated since 40.0.0: Expr::add_column_refs instead
Expand description

Recursively walk a list of expression trees, collecting the unique set of columns referenced in the expression