resultset

type CursorResultSet interface {
	ResultSet

	GetRowIterator() RowIterator
}

type FetchNotifier interface {
	// OnFetchReturned be called when COM_FETCH returns.
	// it will be used in server-side cursor.
	OnFetchReturned()
}

type ResultSet interface {
	Columns() []*column.Info
	NewChunk(chunk.Allocator) *chunk.Chunk
	Next(context.Context, *chunk.Chunk) error
	Close()
	// IsClosed checks whether the result set is closed.
	IsClosed() bool
	FieldTypes() []*types.FieldType
	SetPreparedStmt(stmt *core.PlanCacheStmt)
	Finish() error
	TryDetach() (ResultSet, bool, error)
}

type RowIterator interface {
	// Next returns the next Row.
	Next(context.Context) chunk.Row

	// Current returns the current Row.
	Current(context.Context) chunk.Row

	// End returns the invalid end Row.
	End() chunk.Row

	// Error returns none-nil error if anything wrong happens during the iteration.
	Error() error

	// Close closes the dumper
	Close()
}