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Enhanced custom error in PLPythonu

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Patch adds a new, more rich,  way to emit error message or exception from
PL/Pythonu code.

Author: Pavel Stehule
Reviewers: Catalin Iacob, Peter Eisentraut, Jim Nasby
This commit is contained in:
Teodor Sigaev
2016-04-08 18:30:25 +03:00
parent 5364b357fb
commit 5c3c3cd0a3
7 changed files with 702 additions and 82 deletions
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137
src/pl/plpython/sql/plpython_test.sql
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@@ -36,8 +36,7 @@ $$ LANGUAGE plpythonu;
select module_contents();
CREATE FUNCTION elog_test() RETURNS void
CREATE FUNCTION elog_test_basic() RETURNS void
AS $$
plpy.debug('debug')
plpy.log('log')
@@ -50,4 +49,138 @@ plpy.warning('warning')
plpy.error('error')
$$ LANGUAGE plpythonu;
SELECT elog_test_basic();
CREATE FUNCTION elog_test() RETURNS void
AS $$
plpy.debug('debug', detail = 'some detail')
plpy.log('log', detail = 'some detail')
plpy.info('info', detail = 'some detail')
plpy.info()
plpy.info('the question', detail = 42);
plpy.info('This is message text.',
detail = 'This is detail text',
hint = 'This is hint text.',
sqlstate = 'XX000',
schema = 'any info about schema',
table = 'any info about table',
column = 'any info about column',
datatype = 'any info about datatype',
constraint = 'any info about constraint')
plpy.notice('notice', detail = 'some detail')
plpy.warning('warning', detail = 'some detail')
plpy.error('stop on error', detail = 'some detail', hint = 'some hint')
$$ LANGUAGE plpythonu;
SELECT elog_test();
do $$ plpy.info('other types', detail = (10,20)) $$ LANGUAGE plpythonu;
do $$
import time;
from datetime import date
plpy.info('other types', detail = date(2016,2,26))
$$ LANGUAGE plpythonu;
do $$
basket = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']
plpy.info('other types', detail = basket)
$$ LANGUAGE plpythonu;
-- should fail
do $$ plpy.info('wrong sqlstate', sqlstate='54444A') $$ LANGUAGE plpythonu;
do $$ plpy.info('unsupported argument', blabla='fooboo') $$ LANGUAGE plpythonu;
do $$ plpy.info('first message', message='second message') $$ LANGUAGE plpythonu;
do $$ plpy.info('first message', 'second message', message='third message') $$ LANGUAGE plpythonu;
-- raise exception in python, handle exception in plgsql
CREATE OR REPLACE FUNCTION raise_exception(_message text, _detail text DEFAULT NULL, _hint text DEFAULT NULL,
_sqlstate text DEFAULT NULL,
_schema text DEFAULT NULL, _table text DEFAULT NULL, _column text DEFAULT NULL,
_datatype text DEFAULT NULL, _constraint text DEFAULT NULL)
RETURNS void AS $$
kwargs = { "message":_message, "detail":_detail, "hint":_hint,
"sqlstate":_sqlstate, "schema":_schema, "table":_table,
"column":_column, "datatype":_datatype, "constraint":_constraint }
# ignore None values
plpy.error(**dict((k, v) for k, v in iter(kwargs.items()) if v))
$$ LANGUAGE plpythonu;
SELECT raise_exception('hello', 'world');
SELECT raise_exception('message text', 'detail text', _sqlstate => 'YY333');
SELECT raise_exception(_message => 'message text',
_detail => 'detail text',
_hint => 'hint text',
_sqlstate => 'XX555',
_schema => 'schema text',
_table => 'table text',
_column => 'column text',
_datatype => 'datatype text',
_constraint => 'constraint text');
SELECT raise_exception(_message => 'message text',
_hint => 'hint text',
_schema => 'schema text',
_column => 'column text',
_constraint => 'constraint text');
DO $$
DECLARE
__message text;
__detail text;
__hint text;
__sqlstate text;
__schema_name text;
__table_name text;
__column_name text;
__datatype text;
__constraint text;
BEGIN
BEGIN
PERFORM raise_exception(_message => 'message text',
_detail => 'detail text',
_hint => 'hint text',
_sqlstate => 'XX555',
_schema => 'schema text',
_table => 'table text',
_column => 'column text',
_datatype => 'datatype text',
_constraint => 'constraint text');
EXCEPTION WHEN SQLSTATE 'XX555' THEN
GET STACKED DIAGNOSTICS __message = MESSAGE_TEXT,
__detail = PG_EXCEPTION_DETAIL,
__hint = PG_EXCEPTION_HINT,
__sqlstate = RETURNED_SQLSTATE,
__schema_name = SCHEMA_NAME,
__table_name = TABLE_NAME,
__column_name = COLUMN_NAME,
__datatype = PG_DATATYPE_NAME,
__constraint = CONSTRAINT_NAME;
RAISE NOTICE 'handled exception'
USING DETAIL = format('message:(%s), detail:(%s), hint: (%s), sqlstate: (%s), '
'schema:(%s), table:(%s), column:(%s), datatype:(%s), constraint:(%s)',
__message, __detail, __hint, __sqlstate, __schema_name,
__table_name, __column_name, __datatype, __constraint);
END;
END;
$$;
-- the displayed context is different between Python2 and Python3,
-- but that's not important for this test
\set SHOW_CONTEXT never
do $$
try:
plpy.execute("select raise_exception(_message => 'my message', _sqlstate => 'XX987', _hint => 'some hint', _table=> 'users_tab', _datatype => 'user_type')")
except Exception, e:
plpy.info(e.spidata)
raise e
$$ LANGUAGE plpythonu;
do $$
try:
plpy.error(message = 'my message', sqlstate = 'XX987', hint = 'some hint', table = 'users_tab', datatype = 'user_type')
except Exception, e:
plpy.info('sqlstate: %s, hint: %s, tablename: %s, datatype: %s' % (e.sqlstate, e.hint, e.table_name, e.datatype_name))
raise e
$$ LANGUAGE plpythonu;