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Collapse Showplan Operator

The Collapse operator optimizes update processing. When an update is performed, it can be split (using the Split operator) into a delete and an insert. The Argument column contains a GROUP BY:() clause that specifies a list of key columns. If the query processor encounters adjacent rows that delete and insert the same key values, it replaces these separate operations with a single more efficient update operation.

Collapse is a logical and physical operator.

Collapse operator iconGraphical execution plan icon

See Also

Tasks

How to: Display an Actual Execution Plan

Reference

Split 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