pub fn functions_for(
object: &TableObjectType,
) -> Vec<(&'static str, Returns, Vec<String>)>Expand description
The columns each aggregate function applies to, for one table.
Returns (function, returns, columns) and omits any function with no
column to apply it to – a GraphQL type may not have zero fields, so a
table of nothing but text has no sum type at all rather than an empty
one.