Difference between revisions of "ERROR Table Constraint"

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(Products)
 
Line 19: Line 19:
 
==Example==
 
==Example==
 
<code lang="recital">
 
<code lang="recital">
set sql to vfp
+
CREATE TABLE purchase_order;
CREATE TABLE purchase_order (POid i PRIMARY KEY, SuppId i, POtotal n(10,2), ;
+
  (POid i PRIMARY KEY, SuppId i, POtotal n(10,2),;
CHECK callauth() ERROR [Not authorized])
+
  CHECK callauth();
 +
  ERROR [Not authorized])
 
</code>
 
</code>
  

Latest revision as of 10:34, 22 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

CREATE TABLE purchase_order;
  (POid i PRIMARY KEY, SuppId i, POtotal n(10,2),;
  CHECK callauth();
  ERROR [Not authorized])


Products

Recital, Recital Server