TestStand database schema, Command Text

Question

Hi,
I made a copy of Generic Insert schema and began to modify it.
I deleted 2 fields from the UUT_RESULT table, and also from the table in my database. When I check the 'Validate' I get an error "Number fo Columns in the SQL text for statement UUT_RESULT does not match number of columns/parameters defined in schema".
I modified the text in the 'Command Text' to reflect the change that I had made, but it is recreated either when executing 'Validate' or when exit and re-entering the database configuration.
1) How to modify the schema to remove the fields?
2) Why is this schema uses INSERT where the 'Generic Recordset' uses SELECT?
3) The schemas provided by NI can not be modified. ONly their copy can. Also, the original sc
hemas do not have any text in the Commnad Text. Can you explain that please?
Thanks
Rafi

Answer 1

Rafi -
1) The SQL statement must match the number of columns specified. If you delete a column from the Columns tab, you must alter the SQL statement by deleting the corresponding field name from the text and you must remove the "?" from the VALUES() section of the text.
2) Most SQL databases support both SELECT and INSERT statements. A SELECT statement opens the table(s) and allows the client to fetch and create new records. This is a lower performance method to access a database. An INSERT statement is only allowed to create new records and typically has better performance. TestStand offers both ways as an example to end-users.
3) We attempt to protect the NI schemas so that when a new release comes out and NI updates the schema, TestStand does
not overwrite any edits that you could have made to an NI schema.
Regarding the text not showing up for the Command Text control when dimmed, TestStand 3.0 had this behavior. TestStand 3.1 does not exhibit this behavior. For TestStand 3.0, all you have do it either copy the schema and look at the editable copy or temporarily check the Allow Editing of Schema on the Schemas tab and you can look at an NI schema.
Scott Richardson (NI)
Scott Richardson
National Instruments