Module columns 

PostgreSQL column-name and stored-type declaration rules.

Modules

addition

Bind an added column against current defaults, CHECKs, generated expressions, and foreign keys.

alteration

Analyze altered column expressions and types against ordered catalog snapshots.

publication

Mutate a declared column candidate before its catalog publication.

removal_metadata

Validate column dependencies against retained relation metadata and remove local declarations.

type_target

Ordered checks of an ALTER COLUMN TYPE target before its new type is resolved.

type_transform

USING expression analysis and assignment compatibility over the original row type.

Constants

POSTGRES_SYSTEM_COLUMNS

Functions

altered_column

The column an ALTER TABLE ... ALTER COLUMN action names, as get_attnum finds it for ATExecColumnDefault and its siblings.

append_registered_column

Append a declared column after checking its name against the existing schema.

missing_altered_column

The error for an ALTER COLUMN target that is not a column of the relation: every relation has the system columns, which cannot be altered, and any other name does not exist.

missing_drop_column_notice

The notice for a missing column, using the unqualified name of the already bound relation.

undefined_relation_column

column "x" of relation "t" does not exist, which ALTER TABLE reports for a column the relation lacks.

validate_default_change

ATExecColumnDefault’s checks of the column whose default SET DEFAULT (setting) or DROP DEFAULT changes: an identity column takes its values from its sequence and a generated column from its expression.

validate_drop_column

Check a DROP target before dependency traversal. Missing IF EXISTS targets return false so execution can publish its notice without changing the relation.

validate_postgres_column_name

validate_postgres_relation_column_type