Hi,
On 29 October 2010 17:02, Dragos Valentin Moinescu
<dragos.moinescu@gmail.com> wrote:
> The thing is that I cannot catch the exception raised by plpy.execute().
I came to this plpython function template. It handles errors properly
and works faster then usual function because of the code caching.
CREATE OR REPLACE FUNCTION some_plpython_function()
RETURNS integer
LANGUAGE plpythonu
AS $function$
""" Exaple of function's core cache and error handling """
sdNamespace = 'some_plpython_function'
if sdNamespace not in SD:
def main():
""" The function is assumed to be cached in SD and reused """
result = None
# Do whatever you need here
return result
# Cache body in SD
SD[sdNamespace] = main
try:
return SD[sdNamespace]()
except Exception, e:
import traceback
plpy.info(traceback.format_exc())
$function$;
>
> I tried this with the following code:
>
> CREATE OR REPLACE FUNCTION __syncpg_execute() RETURNS boolean
> AS $$
> try:
> plpy.execute("SELECT * FROM not_existing_table", 5)
> except Exception, exc:
> plpy.notice("Exception %s" % str(exc) )
> return True
> $$ LANGUAGE plpythonu;
>
> The result is:
> # select __syncpg_execute();
> WARNING: PL/Python: plpy.SPIError: unrecognized error in PLy_spi_execute_query
> CONTEXT: PL/Python function "__syncpg_execute"
> NOTICE: Exception error return without exception set
> CONTEXT: PL/Python function "__syncpg_execute"
> ERROR: relation "not_existing_table" does not exist
> LINE 1: SELECT * FROM not_existing_table
> ^
> QUERY: SELECT * FROM not_existing_table
> CONTEXT: PL/Python function "__syncpg_execute"
>
> I am using Postgresql9.0 with python 2.4.3
>
> Thank you
>
> --
> Best regards,
> Dragos Moinescu
>
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