Module alteration 

Analyze altered column expressions and types against ordered catalog snapshots.

Structs

ColumnAlterAnalysisContext

Traits

ColumnChangeCatalog

Read only the declared type, existence, or loaded column generation requested by an ALTER action.

Functions

analyze_column_type

analyze_generated_expression

generated_columns_referencing_column

validate_column_default

ATExecColumnDefault for SET DEFAULT: the column is checked before the default is analyzed against its type. Returns whether a default remains; SET DEFAULT NULL leaves none.

validate_column_type_constraints

Rebind the dependent declarations after every column type has changed. A foreign key can refer to another column changed by the same ALTER statement.

validate_default_removal

ATExecColumnDefault for DROP DEFAULT.

validate_drop_expression

ATExecDropExpression’s checks: the notice that skips a column that is not generated under IF EXISTS, or None to drop the expression of a stored generated column.