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Implicit parameter marker conversion on some data-change-table-references

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Abstract

Implicit parameter marker conversion on some data-change-table-references

Content

You are in: IBM i Technology Updates > Db2 for i - Technology Updates >  Db2 for i Performance Enhancements > Implicit parameter marker conversion on some data-change-table-references

The original implementation of data-change-table-reference (aka Select from Insert) did not allow any statement reuse of dynamic statements when only literal values changed (also referred to as parameter marker conversion).   

With this enhancement, if the insert is a simple one row VALUES clause containing only literals it will be considered eligible for reuse. 

There can be no expressions, no special registers, no parameter markers, and no DEFAULT keywords in the VALUES list.

By allowing these statements to become eligible for parameter marker conversion, the statements can be reused.

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Document Information

Modified date:
21 January 2020

UID

ibm11116585