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OBIEE 12c: Left Outer joins in confirmed dimensions and fact creates the same alias for two different sub queries (Doc ID 2706786.1)

Last updated on SEPTEMBER 01, 2020

Applies to:

Business Intelligence Server Enterprise Edition - Version 12.2.1.4.200114 and later
Information in this document applies to any platform.

Symptoms

Developing RPD model like below against Hadoop Hive data source---

A fact is joined to dimension and dimension is again joined to another using left outer join. Similarly two dimensions which are joined to another dimension through left outer join.
When try to generate a report the sql is generating multiple sub queries, which is expected. However it is using same alias name for two different sub queries and duplicate alias created in physical query and also seen in Nqserver execution plan.

 

Changes

 Duplicate alias introduced while optimizing joins for hive. 'After Making Joins Left-recursive for Hive'

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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