Difference between revisions of "ONINSERT Table Constraint"
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==Purpose== | ==Purpose== | ||
Table constraint activated when an attempt is made to insert a new record into the table | Table constraint activated when an attempt is made to insert a new record into the table | ||
Revision as of 15:18, 29 October 2009
Purpose
Table constraint activated when an attempt is made to insert a new record into the table
Syntax
ONINSERT <procedure>
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 ONINSERT table constraint is activated when an attempt is made to insert a new record into the table. The <procedure> specified must be a character expression evaluating to a procedure name. If no file extension is included, '.prg' is assumed. The specified procedure is run before the operation to insert the record is executed and must return True (.T.) or the insert operation is cancelled.
Example
ALTER TABLE customer modify ONINSERT "p_insert";
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
