Lei Chang created HAWQ-982:
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Summary: PL/Python with psycopg2 cannot connect to remote postgres
Key: HAWQ-982
URL: https://issues.apache.org/jira/browse/HAWQ-982
Project: Apache HAWQ
Issue Type: Bug
Components: Core
Reporter: Lei Chang
Assignee: Lei Chang
For one use case I want to connect to external postgreSQL database from HAWQ
PL/Python procedure.
I use python psycopg2 library.
Remote postgreSQL server reject connecion from HAWQ with
this error : FATAL unsupported frontend protocol 28675.0: server supports 1.0
to 3.0.
The same python code is running well from OS level.
I wonder if it is HAWQ or PostgreSQL PL/Python interpreter related issiue.
Any help or pointers would be great.
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my code below:
CREATE OR REPLACE FUNCTION dchoma.connection_test( ) RETURNS text AS
$$
import psycopg2
try:
conn = psycopg2.connect("dbname='database_name' user='user'
host='remote_host' password='pass' port=5432")
return "Connection successful "
except Exception , msg :
return "Exception: {m}".format(m=msg)
$$
LANGUAGE 'plpythonu' VOLATILE;
select * from dchoma.connection_test();
HAWQ version 2.0.1.0 build dev ( compiled from github)
Remote database version: PostgreSQL 9.2.15 on x86_64-redhat-linux-gnu,
compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4), 64-bit
OS: CentOS 7-1511
i found similar issiue here, but the problem is not solved.
https://discuss.zendesk.com/hc/en-us/community/posts/200793368-greenplum-dblink-postgresql-remote-is-error
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