Not Null Constraint is ignored on a CLOB column (Doc ID 1516727.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Server - Enterprise Edition - Version 11.1.0.7 to 11.2.0.3 [Release 11.1 to 11.2]
Information in this document applies to any platform.

Symptoms

ORA-1400 is not being raised when a NULL is inserted into a LOB column in a table and the column has a NOT NULL constraint enabled.

When inserting NULL data into a NOT NULL CLOB column, the statement expectedly fails with
ORA-01400: cannot insert NULL into ("SYSADM"."ZZZ_CLOB"."SAA_DESCRLONG")

However, when the table has an index with sorting DESC, it inserts NULL in the CLOB column
When DESC is omitted, again the ORA-1400 error is reported as expected

 

 

Cause

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