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PL/Python custom SPI exceptions

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This provides a separate exception class for each error code that the
backend defines, as well as the ability to get the SQLSTATE from the
exception object.

Jan Urbański, reviewed by Steve Singer
This commit is contained in:
Peter Eisentraut
2011-02-28 18:41:10 +02:00
parent 0ef0b30204
commit 474a42473a
12 changed files with 342 additions and 26 deletions
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21
src/pl/plpython/sql/plpython_error.sql
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@@ -131,6 +131,27 @@ return None
SELECT valid_type('rick');
/* check catching specific types of exceptions
*/
CREATE TABLE specific (
i integer PRIMARY KEY
);
CREATE FUNCTION specific_exception(i integer) RETURNS void AS
$$
from plpy import spiexceptions
try:
plpy.execute("insert into specific values (%s)" % (i or "NULL"));
except spiexceptions.NotNullViolation, e:
plpy.notice("Violated the NOT NULL constraint, sqlstate %s" % e.sqlstate)
except spiexceptions.UniqueViolation, e:
plpy.notice("Violated the UNIQUE constraint, sqlstate %s" % e.sqlstate)
$$ LANGUAGE plpythonu;
SELECT specific_exception(2);
SELECT specific_exception(NULL);
SELECT specific_exception(2);
/* manually starting subtransactions - a bad idea
*/
CREATE FUNCTION manual_subxact() RETURNS void AS $$