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Status Not under consideration
Workspace Db2
Components Federation
Created by Guest
Created on Apr 8, 2018

NOT NULL limitation violation of VARCHAR2 in case federated SELECT ''(empty charactor) from Oracle compati Db2 to Native Db2

[Situation]
There is a federated system between VARCHAR2 compatibility off w/ NOT NULL limitation column defined table (actual source table) and VARCHAR2 compatibility on w/ NOT NULL limitation column defined nick name (federated) table.
[Current design]
When some application submit a query which contains the varchar2 column to the nickname table, if the result set from the source table contains ""(empty charractor), it become the NOT NULL limitation violation to go back to error code to the application.

[ideal design]
VARCHAR2 column is populally used in Oracle DB.
Originally VARCHAR2 compatibility function comes from Oracle compatibility enhancement activity, so if we strongly request current Oracle user to replace their current Oracle system, above situation will be frequently encountered.

[Request action]
So, it should be modified not to get not null violation when federated select query from VARCHAR2 compatibility ON column table (incl. '' empty charactor) to VARCHAR2 compatibility OFF column table.