Lazy Spool Showplan Operator

The Lazy Spool logical operator stores each row from its input in a hidden temporary object stored in the tempdb database. If the operator is rewound (for example, by a Nested Loops operator) but no rebinding is needed, the spooled data is used instead of rescanning the input. If rebinding is needed, the spooled data is discarded and the spool object is rebuilt by rescanning the (rebound) input.

The Lazy Spool operator builds its spool file in a "lazy" manner, that is, each time the spool's parent operator asks for a row, the spool operator gets a row from its input operator and stores it in the spool, rather than consuming all rows at once.

Lazy Spool is a logical operator.

Graphical execution plan icon

See Also

Tasks

How to: Display an Actual Execution Plan

Reference

Eager Spool Showplan Operator

Concepts

Logical and Physical Operators Reference
Displaying Execution Plans by Using the Showplan SET Options (Transact-SQL)

Help and Information

Getting SQL Server 2005 Assistance