Home > oracle > ORA-01445: cannot select ROWID from, or sample, a join view without a key-preserved table

ORA-01445: cannot select ROWID from, or sample, a join view without a key-preserved table

One of our developers has problems with a select of different tables:


SELECT ROWID,
 TMP_TABLE_ALIAS.*
FROM
 (select a.*,
 B.*,
 (SELECT MAX(TMP_CODEMP)
 FROM ATE_TABLE
 WHERE TMP_IDTRE = TRE_ID
 and TMP_FI is null
 ) AS TRE_CODEMP,
 (SELECT MAX(REV_DATA) FROM AR_TABLE WHERE REV_ID = TRE_ID
 ) AS TRE_DATREV
 FROM AT_TABLE a,
 AP_TABLE B
 WHERE PER_ID = TRE_ID (+)
 ) TMP_TABLE_ALIAS;

This statement works on the development environment, but in the production environment it fails with:


ORA-01445: cannot select ROWID from, or sample, a join view without a key-preserved table 01445

The database versions is the same in both environments: Oracle 10g Release 2 (10.2.0.5).

After reviewing the tables in the production environment, I noticed that one of the tables has no primary key, and that caused the ORA-01445. Even with a unique index the select fails, it’s mandatory to declare primary keys for the tables when they are involved in joins.

About these ads
  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Follow

Get every new post delivered to your Inbox.

Join 33 other followers

%d bloggers like this: