Function dataflow_types::match_key_indices

pub fn match_key_indices(
    key_desc: &RelationDesc, 
    value_desc: &RelationDesc
) -> Result<Vec<usize>>

Computes the indices of the value’s relation description that appear in the key.

Returns an error if it detects a common columns between the two relations that has the same name but a different type, if a key column is missing from the value, and if the key relation has a column with no name.