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Error Occurs When Running A Workbook In Discoverer 11.1.1.6 Or Earlier "ORA-00920 Invalid Relational Operator" Error Or "ORA-00936 Missing Expression" (Doc ID 1146155.1)

Last updated on MAY 25, 2018

Applies to:

Oracle Discoverer - Version 11.1.1.1.0 to 11.1.1.6.0 [Release 11g]
Information in this document applies to any platform.
***Checked for relevance on 29-Sep-2016***

Symptoms

Running a workbook in Discoverer Plus or Viewer 11.1.1.6, or earlier, results in an ORA-00920 and/or ORA-00936 error.
Running the same workbook in Discoverer Desktop client 10.1.2.X is fine.

Error Message:

ORA-00920: invalid relational operator


You may encounter the following error for upgraded workbooks from an earlier version:

ORA-00936: missing expression


You may have also noticed that the query generated by Discoverer has something similar to the following in the where condition, which seems to be causing the problem:

AND (SYSDATE BETWEEN (o221437.EFFECTIVE_START_DATE)(+) AND (o221437.EFFECTIVE_END_DATE)(+))

Or you may see incorrect SQL in the log file when viewed in Oracle Application Server/Enterprise Manager (EM) Console:

WHERE o106789.month + 0 = o118113.month + 0

The problem is typically occurring on workbooks that use dates in a condition (where) clause.

Changes

You may have recently upgraded Discoverer 10g to the 11g version.

Cause

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