Обсуждение: Input validation

 Have table that contains employee keys, paired up with work type keys
 (both foreign keys) and a 3rd column that you enter a billing rate in.
 Then I have a table where employees enter their work. I need to validate
 that the employee, work type pair exists, before allowing the new record
 to be inserted.

 Any thoughts as to good way to do this?


-- 
"They that would give up essential liberty for temporary safety deserve
neither liberty nor safety."
                        -- Benjamin Franklin

On 8/7/19 11:07 AM, stan wrote:
>   Have table that contains employee keys, paired up with work type keys
>   (both foreign keys) and a 3rd column that you enter a billing rate in.
>   Then I have a table where employees enter their work. I need to validate
>   that the employee, work type pair exists, before allowing the new record
>   to be inserted.
> 
>   Any thoughts as to good way to do this?

INSERT UPDATE trigger:

https://www.postgresql.org/docs/11/sql-createtrigger.html

https://www.postgresql.org/docs/11/plpgsql-trigger.html
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com

On 8/7/19 12:07 PM, stan wrote:
>   Have table that contains employee keys, paired up with work type keys
>   (both foreign keys) and a 3rd column that you enter a billing rate in.
>   Then I have a table where employees enter their work. I need to validate
>   that the employee, work type pair exists, before allowing the new record
>   to be inserted.
>
>   Any thoughts as to good way to do this?
>
>
Does the employee interactively specify the "work type" then some 
time-spent value?

Can the work-type be chosen from a drop-down generated by

     select work_type from table where employee = <current user>

Otherwise you'll need a trigger on the insert into "enter their work" 
table.  Sad thing here is the user has likely left the scene.