- Key Generation Transform In Sap Bods
- Use Of Key Generation Transform In Bods 2017
- Use Of Key Generation Transform In Bods And Dogs
- Use Of Key Generation Transform In Bods 2016
When you import a table with an Identity column it is treated like any other regular INT datatype column. And when you load it, an error is raised by the database: 'An explicit value kann not be inserted into an Identity column if IDENTITY_INSERT is set to OFF'.
Keygeneration transform is creating negative key values Negative integers are being assigned via the keygeneration transform The largest keygeneration value is 2,147,483,647. Number, int, bods, keygen, ds, KBA, EIM-DS-EXE, Job Execution, Problem. About this page This is a preview of a SAP Knowledge Base Article. Apr 23, 2019 This video explains about GENERATED KEY COLUMN feature of table comparison. The Key Generation Attribute SPS09 - Duration: 11:31. How to Use the Table Compare Transform.
Generating a development key hash windows. But how can we load a table that has an Identity column?
Key Generation Transform In Sap Bods
First, simply do not set any column to type Identity. DI has the key generation transform to provide values for surrogate keys. It works similar to the identity column logic, take the highest key value and increment it by one. However, the Identity column checks the highest value for each and every row, Key Generation transform only once, at the beginning of the dataflow. So you cannot use the Key Generation if..
- two DI dataflows run in parallel loading the same table. Both will use the same key values.
- DI loading the table and at the same time some other application inserts data.
What is the problem with identity columns actually? DI adds them into the insert statement, even if they have a NULL value and SQL Server complaints. It wouldn't be a problem if SQL Server would look at the column value, figure there is a NULL value and hence ignore the column by itself. But no, the logic for SQL Server is: Identity column has to be omitted from the insert statement.
Use Of Key Generation Transform In Bods 2017
Actually, this can be accomplished in DI quite easily. DI does not base the insert/update/delete statement on the table schema, it does use the columns of the input schema. So all we have to do is to remove the identitiy column from the query before the table loader. And as this column is the physical primary key to the table, wher have to check the flag 'use input keys' in the table loader.
![Key generation transform in bods Key generation transform in bods](/uploads/1/2/5/8/125874151/727272450.png)
Just keep in mind, above works for insert statements only. In update statements the primary key column is not updated anyway, it is used in the where clause only. Hence, for deletes/updates not only is there no problem, but the key column is required there. That makes a dataflow with mixed inserts and updates quite ugly. We need two separate streams of data, updates go into the table unchanged, inserts are converted to normal rows so we can add a query downstream where the identity column is omitted.
A completely different approach is to do what the SQL Server error message advised us: To issue the command 'set IDENTITY_INSERT table ON'. This is a session command, so needs to be part of the session loading the data. A sql() function call cannot be used as this would be a session of its own. The only place where you can add that is the Preload Command in the table loader.
Use Of Key Generation Transform In Bods And Dogs
Use Of Key Generation Transform In Bods 2016
Neither of this solution is perfect. So long term a feature has to be implemented where the enduser simply can chose what method should be used, let DI generate the key or omit the identity column in inserts.