My Oracle Support Banner

Create Fast Refreshable Materialized View With Self Join and Avoid ORA-12052, ORA-957 (Doc ID 789912.1)

Last updated on NOVEMBER 03, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.1.0.5 to 11.2.0.3 [Release 10.1 to 11.2]
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.

Note: This solution is not possible in 9i; trying it for 9i and below will result in ORA-12015: cannot create a fast refresh materialized view from a complex query.


Goal

NOTE: In the images and/or the document content below, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product.  Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.

This article will help to create a FAST refreshable materialized view that contains a SELF-JOIN.

Consider the following testcase:

CREATE TABLE "TESTTB"
(
"COL1" VARCHAR2(10 BYTE) NOT NULL,
"COL2" VARCHAR2(10 BYTE) NOT NULL,
"COL3" VARCHAR2(10 BYTE) NOT NULL,
CONSTRAINT "TESTTB_PK" PRIMARY KEY ("COL1")
);
create materialized view log on TESTTB WITH PRIMARY key, rowid;
create materialized view MVTESTTB
refresh fast
as
select tb1.col1, tb1.col2, tb1.col3,
       tb2.col1, tb2.col2, tb2.col3
from testtb tb1, testtb tb2
where tb1.col1 = tb2.col1
/

from testtb tb1, testtb tb2
*
ERROR at line 8:
ORA-12052: cannot fast refresh materialized view USER1.MVTESTTB

Solution

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Goal
Solution
References

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.