Difference between revisions of "ERROR Table Constraint"
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Revision as of 17:15, 8 December 2009
Purpose
Table constraint to define an error message to be displayed when a validation check fails
Syntax
ERROR <expC>
See Also
ALTER TABLE, CONSTRAINTS, CREATE TABLE
Description
A constraint is used to define rules that help to provide data integrity. TABLE constraints apply to table-based operations. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation.
The ERROR table constraint is used to define an error message to be displayed when a validation check fails. The <expC> is a character string of up to 80 characters.
Example
set sql to vfp CREATE TABLE purchase_order (POid i PRIMARY KEY, SuppId i, POtotal n(10,2), ; CHECK callauth() ERROR [Not authorized])
Products
Recital, Recital Server
