The error-number is a five-digit integer greater than 17000. The error number is stored in the global variable @@error.
If format-string is not supplied or is empty, the error number is used to locate an error message in the system tables. Adaptive Server Enterprise
obtains messages 17000-19999 from the SYSMESSAGES table. In SQL Anywhere this table is an empty view, so errors in this range
should provide a format string. Messages for error numbers of 20000 or greater are obtained from the ISYSUSERMESSAGE system
To create new error messages, use the CREATE ERROR statement. To view the messages in the ISYSUSERMESSAGE system table, query
the SYSUSERMESSAGE system view.
In SQL Anywhere, the format-string length can be up to 255 bytes.
The extended values supported by the Adaptive Server Enterprise RAISERROR statement are not supported in SQL Anywhere.
The format string can contain placeholders for the arguments in the optional argument list. These placeholders are of the
form %nn!, where nn is an integer between 1 and 20.
Intermediate RAISERROR status and code information is lost after the procedure terminates. If at return time an error occurs
along with the RAISERROR then the error information is returned and the RAISERROR information is lost. The application can
query intermediate RAISERROR statuses by examining @@error global variable at different execution points.
The following statement raises error 23000, which is in the range for user-defined errors, and sends a message to the client.
Note that there is no comma between the error-number and the format-string parameters. The first item following a comma is interpreted as the first item in the argument list.
RAISERROR 23000 'Invalid entry for this column: %1!', @val
The next example uses RAISERROR to disallow connections.
CREATE PROCEDURE DBA.login_check()
// Allow a maximum of 3 concurrent connections
IF( DB_PROPERTY('ConnCount') > 3 ) THEN
'User %1! is not allowed to connect -- there are ' ||
'already %2! users logged on',
CAST( DB_PROPERTY( 'ConnCount' ) AS INT )-1;
GRANT EXECUTE ON DBA.login_check TO PUBLIC
SET OPTION PUBLIC.login_procedure='DBA.login_check'