> > Hi, > > I have stored a compressed string in a table field. > > The compressed string is created by zlib using python. > > I want to decompress this string by zlib under plpy but plpy fails to do > > so. Is plpy not support decompression? Why? > > > > Thanks! > > A bit more information is required. What version of Postgres are you using, what > OS? I am guessing that the compressed string is being created by a Python > program external to the database and then inserted into a field, is this > correct? You are then trying to decompress the string via a plpythonu function > within the database,correct? Did you import the zlib module into the plpythonu > function? > > -- > Adrian Klaver > akla...@comcast.net >
Yes, most of your guess is correct. I'm using postgresql 8.3.x and ms windows 2000. The compressed string is saved to the table in binary format using the psycopg. I had set the table field to bytea data type. I want to use the plpythonu to decompress the stored string. Althout I imported the zlib module, it still failed. I can successfully get back the decompressed string if I use the psycopg either inside or outside the plpythonu. But if without psycopg, plpythonu itself can not decompress the string. I can use the psycopg inside the plpythonu but I must need to write security information (including user name,password,server ip,port number,...) to the connection string inside plpythonu too. This is a problem. Thanks! -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
