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"

Last updated on MAY 25, 2018

Applies to:

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:

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

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