Function sql::plan::plan_utils::maybe_rename_columns

pub fn maybe_rename_columns(
    context: impl Display, 
    desc: RelationDesc, 
    column_names: &[Ident]
) -> Result<RelationDesc, Error>

Renames the columns in desc with the names in column_names if column_names is non-empty.

Returns an error if the length of column_names is not either zero or the arity of desc.