sequencer

func (*Service) Allocate ¶

func (s *Service) Allocate(ctx context.Context, table string, dest any, selector string) error

func (*Service) Reserve ¶

func (s *Service) Reserve(ctx context.Context, table string, dest any, selector string) error

Reserve records supplied values before the first allocation for a table. It does not allocate, change the destination, or advance a database sequence. Callers with original-presence evidence pass only originally supplied rows. Native metadata unifies supplied-only aliases before allocation. A supplied transaction acquires native write intent before reading sequence identity.

func (*Service) WithStrategy ¶

func (s *Service) WithStrategy(strategy dialect.PresetIDStrategy) *Service

WithStrategy explicitly selects a native strategy. Empty means the product default; Datly never substitutes a strategy based on transaction presence. Configure before the service is first used.

func (*Walker) Allocate ¶

func (w *Walker) Allocate(value interface{}, seq *Sequence) error

Allocate allocate sequence.

func (*Walker) CountEmpty ¶

func (w *Walker) CountEmpty(value interface{}) (int, error)

func (*Walker) EmptyLeaf ¶

func (w *Walker) EmptyLeaf(value interface{}) (interface{}, error)

EmptyLeaf returns the first record whose leaf selector currently has a zero value.

func (*Walker) Leaf ¶

func (w *Walker) Leaf(value interface{}) (interface{}, error)

Leaf returns a leaf value.