| Subject | RE: [firebird-support] Re: Non null column, before insert trigger not filling column, Delphi |
|---|---|
| Author | Dunbar, Norman |
| Post date | 2010-06-15T12:18:32Z |
Hi Mike,
suspect you won't be able to if they are not defined as NOT NULL in the
database. Just a thought.
Additionally, all constraints and business rules *should* be defined in
the database because that way, any application that tries to change the
data is subject to all the rules and regulation. By putting some
"constraints" and rules into the application, you are creating a void
through which data integrity corruptions can sneak!
Cheers,
Norman.
Norman Dunbar
Contract Senior Oracle DBA
CIS Engineering Services
Internal : 7 28 2051
External : 0113 231 2051
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>> I think it will be easier to modify the DDL of the databaseare you intending to use these ID columns as a primary key? If so, I
>> generation so that the relevant non-null fields which have a
>> Before Insert trigger become generated without the non-null
>> constraint.
suspect you won't be able to if they are not defined as NOT NULL in the
database. Just a thought.
Additionally, all constraints and business rules *should* be defined in
the database because that way, any application that tries to change the
data is subject to all the rules and regulation. By putting some
"constraints" and rules into the application, you are creating a void
through which data integrity corruptions can sneak!
Cheers,
Norman.
Norman Dunbar
Contract Senior Oracle DBA
CIS Engineering Services
Internal : 7 28 2051
External : 0113 231 2051
Information in this message may be confidential and may be legally privileged. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. We have checked this email and its attachments for viruses. But you should still check any attachment before opening it. We may have to make this message and any reply to it public if asked to under the Freedom of Information Act, Data Protection Act or for litigation. Email messages and attachments sent to or from any Environment Agency address may also be accessed by someone other than the sender or recipient, for business purposes. If we have sent you information and you wish to use it please read our terms and conditions which you can get by calling us on 08708 506 506. Find out more about the Environment Agency at www.environment-agency.gov.uk
Information in this message may be confidential and may be legally privileged. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else.
We have checked this email and its attachments for viruses. But you should still check any attachment before opening it.
We may have to make this message and any reply to it public if asked to under the Freedom of Information Act, Data Protection Act or for litigation. Email messages and attachments sent to or from any Environment Agency address may also be accessed by someone other than the sender or recipient, for business purposes.
If we have sent you information and you wish to use it please read our terms and conditions which you can get by calling us on 08708 506 506. Find out more about the Environment Agency at www.environment-agency.gov.uk