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SQL Optimizer for DB2 ZOS 5.6.1 - User Guide

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MERGESTMT

Denotes the MERGE statement.

This node merges the conditional UPDATE and INSERT operation on a target table or view into one statement.

 

MIXSCAN

Scan a multiple-index.

 

MSJOIN

Use to perform a merge join.

 

NLJOIN

Use to perform a nested loop join.

This join is used to join tables and is represented by a NLJOIN node and right and left subtrees. The inner table is represented by the right subtree and the outer table by the left subtree. Use either a single-index scan, a multiple-index scan, or a table space scan to access both the inner and outer tables. You can also include another join operation with the left subtree.

 

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