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SQL Optimizer for DB2 ZOS 5.6 - User Guide

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DIXSCAN

Welcome > SQL Operations > DIXSCAN

Represents access by XML DOCID index scan.

 

EXCEPT

Welcome > SQL Operations > EXCEPT

Denotes the EXCEPT operation.

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

 

EXCEPTA

Welcome > SQL Operations > EXCEPTA

Denotes the EXCEPT ALL operation.

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

 

FETCH

Welcome > SQL Operations > FETCH

Represents the retrieval of columns for a row.

The FETCH operator uses RIDs from an IXSCAN or MIXSCAN.

 

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