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SQL Optimizer for DB2 ZOS 5.6.1 - User Guide

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DIXSCAN

Represents access by XML DOCID index scan.

 

EXCEPT

Denotes the EXCEPT operation.

This operation returns rows in the outer table only and eliminates redundant duplicate rows.

 

EXCEPTA

Denotes the EXCEPT ALL operation.

This operation returns rows in the outer table only and retains redundant duplicate rows.

 

FETCH

Represents the retrieval of columns for a row.

The FETCH operator uses RIDs from an IXSCAN or MIXSCAN.

 

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