Questions tagged [foreign-data]
The foreign-data tag has no usage guidance.
19
questions
-1
votes
1answer
78 views
Postgres 12 Scalability using table Partitioning and Foreign Data Wrappers
I have looked through the archives and I cant find any discussions around the following topic.
I have a fairly in depth question that I would appreciate some guidance with.
Current environment
...
0
votes
2answers
27 views
Using IMPORT FOREIGN SCHEMA with Greenplum database
I have setup a PostgreSQL 12 database and am trying to connect to a Greenplum database in order to create proxy tables. I am able to connect to the Greenplum db, but I get an error when I try to use ...
1
vote
0answers
110 views
Querying foreign table with SP-GiST index results in “ERROR: cache lookup failed for type 0” [duplicate]
I'm using PostgreSQL 11.3 (compiled by Visual C++ build 1914, 64-bit) and I want to access a table in another Postgres database using postgres_fdw but since the original table has an SP-GiST index on ...
0
votes
1answer
62 views
Postgres special character rendering
I have an old Sql Server db with a ‘free entry’ field that is being accessed via a Postgres 10.6 foreign table. This field contains a lot of garbage characters (higher than Ascii 128) which Postgres ...
0
votes
0answers
157 views
Postgres TRIGGERS to create csv file after insert on Foreign Table
I have a foreign table called vw_asset_register with over 5000 rows in there which I'm calling from MSSQL database.
SELECT
*
FROM vw_asset_register.
I always use this to create CSV file into my ...
0
votes
0answers
128 views
Permission issue with a view built on top of foreign tables
I am consolidating data from several postgresql databases, all with the same schema, into a new one. To do that I mapped the tables I am interested in the new DB as foreign tables with postgres_fdw. ...
2
votes
2answers
667 views
FDW Permissions error using MD5 encrypted password
When creating Foreign Data Wrappers in Postgres 9.6, if I use the following:
CREATE SERVER foreign_server
FOREIGN DATA WRAPPER postgres_fdw
OPTIONS (host 'localhost', dbname 'database', port '5432');
...
3
votes
1answer
224 views
Dynamic paths for postgres file_fdw (csv)
I've got a postgres database which relies on the use of foreign tables to support the loading of large data sets based on user-provided (system sanitized) tables. I'd use COPY, but the tables loaded ...
2
votes
1answer
873 views
ORDER BY too slow in Foreign Table using postgres_fdw
PostgreSQL v9.6, postgres_fdw
Foreign table
CREATE FOREIGN TABLE user_info (
id bigint ,
info jsonb
)
SERVER server_test_fdw OPTIONS(SCHEMA_NAME 'public', TABLE_NAME 'user_info_raw' );
-- ...
2
votes
1answer
83 views
naming a column differently then its original one in foreign data wrapper of PostgreSQL
I have two databases. In each database I have an employee table which differ from each other in the number of columns and column names.
Here is what the table looks in the first database:
Emp_ID ...
1
vote
0answers
1k views
Can I use Foreign Data Wrapper for SQL Server in Windows Server 2012?
I use PostgreSQL and SQL Server. I want to get SQL Server data in PostgreSQL.
I found PostgreSQL Foreign Data Wrapper. There are installation packs for CentOS and Ubuntu. However, I want to use FDW ...
2
votes
1answer
2k views
Create Materialized View from foreign table
I'd like to create a simple materialized view from a table which lies in a different database. The two databases are on the same server.
What do I have to add to make the query access the foreign ...
1
vote
1answer
3k views
SQL Query; Admin Log System; Foreign Keys; Retriving multiple rows form different tables at once
Table A (users)
id | name | ip
52433 Yashas 1.1.1.1
512 Admin 5.6.7.8
Table B (admin_record)
id | admin | time | date | reason | action
52433 512 2312352 ...
2
votes
1answer
2k views
Postgres 9.5 foreign table inheritance not using indexes
In PostgreSQL 9.5.0 I have a partitioned table that collects data by months. I tried to use the new PostgreSQL feature of foreign table inheritance and pushed one month of data to another PostgreSQL ...
1
vote
1answer
1k views
Foreign Data Wrappers & Windows Authentication
I been trying to get data from a SQL Server to use it on a PostgreSQL database. After a previous question I got into use FOREIGN DATA WRAPPERS, first I try with tds_fdw but after a successfull install ...
0
votes
2answers
51 views
Check attribute table referenced foreign key
I have two tables a and b like this:
a: id, type
b: a_id, ...
There is a limitation for which the references of a in b can only be those which have type equal to a limited set of values.
Is it ...
5
votes
1answer
2k views
Rely on .pgpass in CREATE USER MAPPING
I am trying to create a script which creates a postgres-fdw connection between two postgres 9.4 databases. The script (which is checked in under version control), has been relying on pgpass to do ...
5
votes
2answers
1k views
manual execution of specific remote query with postgresql_fdw
In 9.4b2, postgresql_fdw doesn't know how to "push down" aggregate queries on remote tables, e.g.
> explain verbose select max(col1) from remote_tables.table1;
...
1
vote
1answer
872 views
FDW, replication and CREATE SERVER - will it work?
We have two servers (master, slave) and we want to use the FDW. The two databases to be connected with the FDW are both on the master (and the slave of course). When we are to CREATE SERVER we would ...
