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DBMS_SQLHASH Does Not Produce The Same Value In All Cases (Doc ID 1569256.1)

Last updated on MARCH 15, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 to 12.1.0.1 [Release 11.2 to 12.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

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DBMS_SQLHASH does not always return the same value for the same result set. It appears that the hash value can depend on the access methods,  not just the result set.

For example, you may get these results on either Windows or Linux 64-bit 11.2.0.3:

 

Changes

 Several factors may contribute to a change in order of results, notably the execution plan.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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