ORA-12015 cannot create a fast refresh materialized view from a complex query

This is an Oracle Database Server Message. This can be generated by the Oracle Database when running any Oracle program.

Cause

Neither ROWIDs and nor primary key constraints are supported for complex queries.

Action

Reissue the command with the REFRESH FORCE or REFRESH COMPLETE option or create a simple materialized view.

Contacting Oracle support services ?

Some messages recommend contacting Oracle Support Services to report a problem. When you contact Oracle Support Services, please have the following information available:

The hardware, operating system, and release number of the operating system on which Oracle is running
The complete release number of the Oracle Database (for example, release 9.2.0.1.0 or release 9.0.1.1.2)
All Oracle programs (with version numbers) in use when the error occurred. For example, SQL*Net V2.0 or SQL*Forms V3.0
If you encountered one or more error codes or messages, then the exact code numbers and message text, in the order they appeared
The problem severity, according to the following codes:

Program not usable. Critical impact on operations.
Program usable. Operations severely restricted.
Program usable with limited functions. Not critical to overall operations.
Problem circumvented by customer. Minimal effect, if any, on operations.

You will also be expected to provide the following:

Your name
The name of your organization
Your Oracle Support ID Number
Your telephone number

Linked Error Messages

ORA-12007 materialized view reuse parameters are inconsistent
ORA-12008 error in materialized view refresh path
ORA-12010 cannot create materialized view log on table owned by SYS
ORA-12011 execution of string jobs failed
ORA-12012 error on auto execute of job string
ORA-12013 updatable materialized views must be simple enough to do fast refresh
ORA-12014 table ' string ' does not contain a primary key constraint
ORA-12016 materialized view does not include all primary key columns
ORA-12017 cannot alter primary key mview ' string ' to a rowid mview
ORA-12018 following error encountered during code generation for " string "." string "
ORA-12019 master table is a synonym to a remote object
ORA-12020 materialized view string is not registered
ORA-12021 materialized view " string "." string " is corrupt
ORA-12022 materialized view log on " string "." string " already has rowid
ORA-12023 missing index on materialized view " string "." string "

Oracle Error Messages and Recommended Actions