operation

type Operation ¶

type Operation interface {
	// Execute the operation.
	Execute(primitive.IPrimitiveCtx) internaldto.ExecutorOutput
	// Reverse the operation.
	Undo() error
	// Get the redo log entry.
	GetRedoLog() (binlog.LogEntry, bool)
	// Get the undo log entry.
	GetUndoLog() (binlog.LogEntry, bool)
	//
	IncidentData(int64, internaldto.ExecutorOutput) error
	//
	SetTxnID(id int)
	//
	SetInputAlias(alias string, id int64) error
	//
	IsReadOnly() bool
}

The Operation is an abstract data type that represents a stackql action. The operation maps to each of:

• an executable action.
• a redo log entry.
• an undo log entry.

One possible implementation is to store a nullable primitive (plan) graph node alongside log entries.

func NewReversibleOperation(pr primitive.IPrimitive) Operation