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SQL Optimizer for DB2 ZOS 5.6.1 - User Guide

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CORSUB

Use a correlated subquery for access.

The CORSUB operation provides access by a correlated subquery.

 

DELCUR

Perform a DELETE WHERE CURRENT OF CURSOR operation.

 

DELETE

Remove rows from a table or view.

A delete construct contains a DELETE node and one of the following: table space scan, single-index access, or multiple-index access.

 

DFETCH

Represents a direct fetch data using ROWID.

ROWID is used as a search condition. This is the most efficient was to access a base table if a ROWID-type column is defined within the table.

 

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