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------------------
Exception handling
------------------
The common syntax rules for EXCEPTION statement is:
EXCEPTION [[name] [value]];
Run-time exception messages (FB 1.5)
------------------------------------
Function:
Allows to throw exceptions with text message
defined at runtime.
Author:
Dmitry Yemanov <yemanov@yandex.ru>
Syntax rules:
EXCEPTION <exception_name> <message_value>;
Scope:
PSQL
Example(s):
1. EXCEPTION E_EXCEPTION_1 'Error!';
2. EXCEPTION E_EXCEPTION_2 'Wrong type for record with ID=' || new.ID;
Exception re-raise semantics (FB 1.5)
-------------------------------------
Function:
Allows to re-initiate catched exception.
Author:
Digitman <digitman@hotbox.ru>
Syntax rules:
EXCEPTION;
Scope:
PSQL, context of the exception handling block
Example(s):
BEGIN
...
WHEN SQLCODE -802 THEN
EXCEPTION E_ARITH_EXCEPT;
WHEN SQLCODE -802 THEN
EXCEPTION E_KEY_VIOLATION;
WHEN ANY THEN
EXCEPTION;
END
Note(s):
Evaluates to no-op if used outside the exception handling block.
Run-time error codes (FB 1.5)
-----------------------------
Function:
Allows to get a numeric error code for the catched exception.
Author:
Dmitry Yemanov <yemanov@yandex.ru>
Syntax rules:
SQLCODE / GDSCODE;
Scope:
PSQL, context of the exception handling block
See also:
README.context_variables
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