I have a table containing a protocol buffer (pb) attribute, and a
stored procedure foo that tries to parse it and return the parsed
value as a human-friendly string (not actual application code, just a
minimal test case to demonstrate the problem). But running foo gives
me nothing back.
yang=# \d qapb
Table "public.qapb"
Column | Type | Modifiers
--------+---------+-----------
id | integer |
pb | bytea |
yang=# select * from qapb;
id | pb
----+------------------------------------------------------------------------
0 | \012\006hello?\020\000\030\000 \000*\014\012\006hello!\020\000\030\000
(1 row)
yang=# create or replace function foo() returns text as $$
import sys, plpy
if '/home/yang/work/pod/' not in sys.path:
sys.path.append('/home/yang/work/pod/')
from my_pb2 import * # this is a protobuf generated module
rv = plpy.execute('select * from qapb')
q = Q()
q.ParseFromString(str(rv[0]['pb']))
return str(q);
$$ language plpythonu;
CREATE FUNCTION
yang=# select foo();
foo
-----
(1 row)
>From a Python prompt, this works fine. I also verified that parsing
works fine from a Python client that first pulls the blob out and
parses client-side.
>>> from my_pb2 import *
>>> q=Q()
>>> q.ParseFromString('\012\006hello?\020\000\030\000 \000*\014\012\006hello!\020\000\030\000')
>>> print q
a: "hello?"
b: 0
c: 0
d: 0
e {
a: "hello!"
b: 0
c: 0
}
Any hints on how I can get to the bottom of this? Thanks in advance.
--
Yang Zhang
http://yz.mit.edu/
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