Prostore::Steps::Kind::AddColumnNullable
Multi-phase kinds (ADR-0009 invariant 1: user-level operations decompose into atomic steps).
AddColumnNullable adds the column as nullable regardless of the field's final nullability. Used as the first step of a non-null add-with-backfill so existing rows can hold NULL until the backfill populates them, and ApplyNotNull tightens afterward.
Constructors
Instance methods
clone
Sourcecopy_with(table_name _table_name = @table_name, field _field = @field)
Sourcefield
table_name