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Add traceback information to PL/Python errors

Browse Source 
This mimics the traceback information the Python interpreter prints
with exceptions.

Jan Urbański
This commit is contained in:
Peter Eisentraut
2011-04-06 22:36:06 +03:00
parent bf6848bc8c
commit 2bd78eb8d5
11 changed files with 786 additions and 76 deletions
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193
src/pl/plpython/expected/plpython_error_0.out
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@ -36,7 +36,10 @@ ERROR: spiexceptions.SyntaxError: syntax error at or near "syntax"
LINE 1: syntax error
^
QUERY: syntax error
CONTEXT: PL/Python function "sql_syntax_error"
CONTEXT: Traceback (most recent call last):
PL/Python function "sql_syntax_error", line 1, in <module>
plpy.execute("syntax error")
PL/Python function "sql_syntax_error"
/* check the handling of uncaught python exceptions
*/
CREATE FUNCTION exception_index_invalid(text) RETURNS text
@ -45,7 +48,10 @@ CREATE FUNCTION exception_index_invalid(text) RETURNS text
LANGUAGE plpythonu;
SELECT exception_index_invalid('test');
ERROR: IndexError: list index out of range
CONTEXT: PL/Python function "exception_index_invalid"
CONTEXT: Traceback (most recent call last):
PL/Python function "exception_index_invalid", line 1, in <module>
return args[1]
PL/Python function "exception_index_invalid"
/* check handling of nested exceptions
*/
CREATE FUNCTION exception_index_invalid_nested() RETURNS text
@ -59,7 +65,10 @@ LINE 1: SELECT test5('foo')
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
QUERY: SELECT test5('foo')
CONTEXT: PL/Python function "exception_index_invalid_nested"
CONTEXT: Traceback (most recent call last):
PL/Python function "exception_index_invalid_nested", line 1, in <module>
rv = plpy.execute("SELECT test5('foo')")
PL/Python function "exception_index_invalid_nested"
/* a typo
*/
CREATE FUNCTION invalid_type_uncaught(a text) RETURNS text
@ -75,7 +84,10 @@ return None
LANGUAGE plpythonu;
SELECT invalid_type_uncaught('rick');
ERROR: spiexceptions.UndefinedObject: type "test" does not exist
CONTEXT: PL/Python function "invalid_type_uncaught"
CONTEXT: Traceback (most recent call last):
PL/Python function "invalid_type_uncaught", line 3, in <module>
SD["plan"] = plpy.prepare(q, [ "test" ])
PL/Python function "invalid_type_uncaught"
/* for what it's worth catch the exception generated by
* the typo, and return None
*/
@ -121,7 +133,10 @@ return None
LANGUAGE plpythonu;
SELECT invalid_type_reraised('rick');
ERROR: plpy.Error: type "test" does not exist
CONTEXT: PL/Python function "invalid_type_reraised"
CONTEXT: Traceback (most recent call last):
PL/Python function "invalid_type_reraised", line 6, in <module>
plpy.error(str(ex))
PL/Python function "invalid_type_reraised"
/* no typo no messing about
*/
CREATE FUNCTION valid_type(a text) RETURNS text
@ -140,6 +155,164 @@ SELECT valid_type('rick');
(1 row)
/* error in nested functions to get a traceback
*/
CREATE FUNCTION nested_error() RETURNS text
AS
'def fun1():
plpy.error("boom")
def fun2():
fun1()
def fun3():
fun2()
fun3()
return "not reached"
'
LANGUAGE plpythonu;
SELECT nested_error();
ERROR: plpy.Error: boom
CONTEXT: Traceback (most recent call last):
PL/Python function "nested_error", line 10, in <module>
fun3()
PL/Python function "nested_error", line 8, in fun3
fun2()
PL/Python function "nested_error", line 5, in fun2
fun1()
PL/Python function "nested_error", line 2, in fun1
plpy.error("boom")
PL/Python function "nested_error"
/* raising plpy.Error is just like calling plpy.error
*/
CREATE FUNCTION nested_error_raise() RETURNS text
AS
'def fun1():
raise plpy.Error("boom")
def fun2():
fun1()
def fun3():
fun2()
fun3()
return "not reached"
'
LANGUAGE plpythonu;
SELECT nested_error_raise();
ERROR: plpy.Error: boom
CONTEXT: Traceback (most recent call last):
PL/Python function "nested_error_raise", line 10, in <module>
fun3()
PL/Python function "nested_error_raise", line 8, in fun3
fun2()
PL/Python function "nested_error_raise", line 5, in fun2
fun1()
PL/Python function "nested_error_raise", line 2, in fun1
raise plpy.Error("boom")
PL/Python function "nested_error_raise"
/* using plpy.warning should not produce a traceback
*/
CREATE FUNCTION nested_warning() RETURNS text
AS
'def fun1():
plpy.warning("boom")
def fun2():
fun1()
def fun3():
fun2()
fun3()
return "you''ve been warned"
'
LANGUAGE plpythonu;
SELECT nested_warning();
WARNING: boom
CONTEXT: PL/Python function "nested_warning"
nested_warning
--------------------
you've been warned
(1 row)
/* AttributeError at toplevel used to give segfaults with the traceback
*/
CREATE FUNCTION toplevel_attribute_error() RETURNS void AS
$$
plpy.nonexistent
$$ LANGUAGE plpythonu;
SELECT toplevel_attribute_error();
ERROR: AttributeError: 'module' object has no attribute 'nonexistent'
CONTEXT: Traceback (most recent call last):
PL/Python function "toplevel_attribute_error", line 2, in <module>
plpy.nonexistent
PL/Python function "toplevel_attribute_error"
/* Calling PL/Python functions from SQL and vice versa should not lose context.
*/
CREATE OR REPLACE FUNCTION python_traceback() RETURNS void AS $$
def first():
second()
def second():
third()
def third():
plpy.execute("select sql_error()")
first()
$$ LANGUAGE plpythonu;
CREATE OR REPLACE FUNCTION sql_error() RETURNS void AS $$
begin
select 1/0;
end
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION python_from_sql_error() RETURNS void AS $$
begin
select python_traceback();
end
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION sql_from_python_error() RETURNS void AS $$
plpy.execute("select sql_error()")
$$ LANGUAGE plpythonu;
SELECT python_traceback();
ERROR: spiexceptions.DivisionByZero: division by zero
CONTEXT: Traceback (most recent call last):
PL/Python function "python_traceback", line 11, in <module>
first()
PL/Python function "python_traceback", line 3, in first
second()
PL/Python function "python_traceback", line 6, in second
third()
PL/Python function "python_traceback", line 9, in third
plpy.execute("select sql_error()")
PL/Python function "python_traceback"
SELECT sql_error();
ERROR: division by zero
CONTEXT: SQL statement "select 1/0"
PL/pgSQL function "sql_error" line 3 at SQL statement
SELECT python_from_sql_error();
ERROR: spiexceptions.DivisionByZero: division by zero
CONTEXT: Traceback (most recent call last):
PL/Python function "python_traceback", line 11, in <module>
first()
PL/Python function "python_traceback", line 3, in first
second()
PL/Python function "python_traceback", line 6, in second
third()
PL/Python function "python_traceback", line 9, in third
plpy.execute("select sql_error()")
PL/Python function "python_traceback"
SQL statement "select python_traceback()"
PL/pgSQL function "python_from_sql_error" line 3 at SQL statement
SELECT sql_from_python_error();
ERROR: spiexceptions.DivisionByZero: division by zero
CONTEXT: Traceback (most recent call last):
PL/Python function "sql_from_python_error", line 2, in <module>
plpy.execute("select sql_error()")
PL/Python function "sql_from_python_error"
/* check catching specific types of exceptions
*/
CREATE TABLE specific (
@ -187,7 +360,10 @@ plpy.execute("rollback to save")
$$ LANGUAGE plpythonu;
SELECT manual_subxact();
ERROR: plpy.SPIError: SPI_execute failed: SPI_ERROR_TRANSACTION
CONTEXT: PL/Python function "manual_subxact"
CONTEXT: Traceback (most recent call last):
PL/Python function "manual_subxact", line 2, in <module>
plpy.execute("savepoint save")
PL/Python function "manual_subxact"
/* same for prepared plans
*/
CREATE FUNCTION manual_subxact_prepared() RETURNS void AS $$
@ -199,4 +375,7 @@ plpy.execute(rollback)
$$ LANGUAGE plpythonu;
SELECT manual_subxact_prepared();
ERROR: plpy.SPIError: SPI_execute_plan failed: SPI_ERROR_TRANSACTION
CONTEXT: PL/Python function "manual_subxact_prepared"
CONTEXT: Traceback (most recent call last):
PL/Python function "manual_subxact_prepared", line 4, in <module>
plpy.execute(save)
PL/Python function "manual_subxact_prepared"