Function pgrx_pg_sys::heap_tuple_get_struct

pub unsafe fn heap_tuple_get_struct<T>(htup: HeapTuple) -> *mut T

Retrieve the “user data” of the specified [HeapTuple] as a specific type. Typically this will be a struct that represents a Postgres system catalog, such as [FormData_pg_class].

Returns

A pointer to the [HeapTuple]’s “user data”, cast as a mutable pointer to T. If the specified htup pointer is null, the null pointer is returned.

Safety

This function cannot verify that the specified htup points to a valid [HeapTuple] nor that if it does, that its bytes are bitwise compatible with T.