Module constraint_changes 

Locate durable constraints and analyze changes to their type, identity, and enforcement metadata.

Modules

foreign_key_target

Resolve materialized foreign keys by name initially and by durable identity after a wait.

inheritance

Match inherited constraints and select removal behavior from their remaining origins.

names

Names and independent catalog identities from a borrowed relation declaration.

not_null_removal

Protect primary keys and identity columns when removing NOT NULL constraints.

renaming

Inherited constraint rename diagnostics and metadata edits preserve constraint identity.

validation

Select constraint validation dependencies and match inherited NOT NULL constraints by column.

Structs

ConstraintAlterEffects

ConstraintAlterOptions

ConstraintAncestor

A constraint without a parent, which the constraints derived from it name in diagnostics.

ConstraintTypeContext

Enums

ConstraintLocation

ForeignKeyLocation

Where a relation declares a foreign key.

Traits

ConstraintTypeReferrers

Functions

apply_constraint_alteration

constraint_error

derived_constraint_alteration

ALTER CONSTRAINT of a constraint derived from another, which PostgreSQL refuses so that the derived constraints keep following the one they derive from.

ensure_constraint_name_available

ensure_not_null_inheritable

find_constraint

foreign_key_object_id

take_column_check

validate_altered_constraint_column_types