Module htup

Utility functions for working with pg_sys::HeapTuple and pg_sys::HeapTupleHeader structs

Structs

DatumWithTypeInfo

Traits

IntoHeapTuple

Implemented for Rust tuples that can be represented as a Postgres pg_sys::HeapTupleData.

Functions

composite_row_type_make_tuple

Given a pg_sys::Datum representing a composite row type, return a boxed HeapTupleData, which can be used by the various heap_getattr methods

heap_getattr

Extract an attribute of a heap tuple and return it as Rust type. This works for either system or user attributes. The given attnum is properly range-checked.

heap_getattr_datum_ex

Similar to heap_getattr(), but returns extended information about the requested attribute attno is 1-based

heap_getattr_raw^⚠

Extract an attribute of a heap tuple and return it as a Datum. This works for either system or user attributes. The given attnum is properly range-checked.

heap_tuple_get_datum

convert a HeapTupleHeader to a Datum.

heap_tuple_header_get_datum_length

Safety

heap_tuple_header_get_type_id^⚠

heap_tuple_header_get_typmod^⚠