Module relation_attributes 

Relation attribute numbers and the physical metadata retained by dropped slots.

Structs

DroppedAttribute

A dropped attribute has no live name, type dependency, default or ACL. Its physical type metadata survives even when the old type is subsequently removed.

Constants

MAX_ATTRIBUTES

PostgreSQL’s MaxHeapAttributeNumber, including dropped attributes.

Functions

array_dimension_count

column_by_number

column_names

column_number

Stored columns use their durable number. Unpublished declarations and derived view/index schemas have their own consecutive positions.

consecutive_names

materialize

Assign numbers only to newly published columns, after every live or dropped slot. Existing numbers and the inputs remain unchanged on an invalid layout.

retain_numbers

A schema candidate retains numbers only from this relation’s existing columns. Inherited or newly declared columns receive fresh local numbers when published.

validate

Load-only restoration rejects missing or contradictory metadata instead of repairing a catalog snapshot.