I am struggling with a FDW between two 9.4.3 postgres databases.
--
I am refering to the remote db as the source and the db with the fdw as the target.
The connected user has the ability to query the source table on the source db successfully so I am assuming all the required grants are there.
When querying from the target system, I get a "relation does not exist" error.
The hitch is that the source table is actually a view that calls other views, which in turn contain functions. When I used a basic table on the target the fdw worked without error.
config:
source:
select current_user;
current_user
--------------
piction_ro
(1 row)
piction_ro@bampfa_domain_bampfa> select count(*) from piction.bampfa_metadata_v;
count
-------
21309
(1 row)
target:
List of foreign servers
-[ RECORD 1 ]--------+-------------------------------------------------------------------------
Name | bampfa_dev_server
Owner | postgres51
Foreign-data wrapper | postgres_fdw
Access privileges |
Type |
Version |
FDW Options | (host 'source_host', port 'XXXX', dbname 'bampfa_domain_bampfa')
Description |
List of user mappings
-[ RECORD 1 ]--------------------------------------------
Server | bampfa_dev_server
User name | piction
FDW Options | ("user" 'piction_ro', password '***')
List of foreign tables
-[ RECORD 1 ]--------------------------------------------------------
Schema | piction
Table | bampfa_metadata_fv
Server | bampfa_dev_server
FDW Options | (schema_name 'piction', table_name 'bampfa_metadata_v')
Description |
piction@piction_transit> select * from piction.bampfa_metadata_fv limit 4;
ERROR: relation "collectionobjects_common" does not exist
CONTEXT: Remote SQL command: SELECT objectcsid, idnumber, sortobjectnumber, artistcalc, artistorigin, title, datemade, site, itemclass, materials, measurement, fullbampfacreditline, copyrightcredit, photocredit, subjects, collections, periodstyles, artistdates, caption, tags, permissiontoreproduce, acquisitionsource, legalstatus, updatedat FROM piction.bampfa_metadata_v
PL/pgSQL function utils.concat_artists(character varying) line 7 at SQL statement
But if we are on the source as the mapped user, we can select from the table in question:
piction_ro@bampfa_domain_bampfa> select * from collectionobjects_common limit 2;
-[ RECORD 1 ]------------------+-------------------------------------------------
--------------------------------------------------------------------------------
id | 2d40e6eb-a4f7-402b-ab06-f3fb57fb6e5d
assoceventnametype |
ownershipcategory |
fieldcollectionnote |
ownershipplace |
...
We can also execute the function in the source view:
piction_ro@bampfa_domain_bampfa> select utils.concat_artists('foo');
-[ RECORD 1 ]--+-
concat_artists |
\df+ utils.concat_artists
List of functions
-[ RECORD 1 ]-------+----------------------------------------------------------------------------------------
Schema | utils
Name | concat_artists
Result data type | character varying
Argument data types | csid character varying
Type | normal
Security | invoker
Volatility | immutable
Owner | nuxeo_bampfa
Language | plpgsql
Any help would be much appreciated, I am thinking it could have something to do with the complexity of the base view, or perhaps fdw gets confused if the source is a view and not an actual table, but I would think the query should act just as the mapped user on the source system.
Adam
Adam Fuchs
Database Administrator
UC Berkeley - Information Services & Technology
2195 Hearst Ave., Berkeley, CA 94120
510-664-4354
