Load Column When........

Question

Hello Guys,
I have a table with the function UPDATE / INSERT. There are three attributes (id, name and description), where id is a sequence, the name is unique primary key.
In the properties of the load, the "ID" field is as follows:
Load Column When insert Row: YES
Load Column When Updating Row: NO
Match Column When Updating Row: NO
Match Column When Deleting Row: NO
The field "Name" is as follows:
Load Column When Row insert: NO
Load Column When Updating Row: YES
Match Column When Updating Row: YES
Match Column When Deleting Row: NO
The course "Description" is as follows:
Load Column When Row insert: NO
Load Column When Updating Row: YES
Match Column When Updating Row: YES
Match Column When Deleting Row: NO
When I run the load, it works without problems. In the next load, the sequence jumps from 3 to 7 to insert record. It is not sequential (3,4,5 ..... 7).
Tks!

Answer 1

Hi Alex,
In the next load, the sequence jumps from 3 to 7 to insert record. It is not sequential (3,4,5 ..... 7).It is an expected behaviour of Oracle sequence - Oracle sequence doesn't guarantee non-gap number generating.
Another cause of "missing" values from sequence - is a MERGE SQL stataement (which generated in your mapping for update/insert loading type I assume),
MERGE SQL call sequence generation for ALL rows from select part (not only for inserted rows).
Regards,
Oleg