Open and0x000 opened 7 years ago
Can you please share a complete test case that we can use for reproducing the issue?
I have tried the simple test case http://sqlfiddle.com/#!15/4fcfc/2 with mysql_fdw foreign tables and it is giving me correct results.
Sorry about the late reply, I was busy with my bachelor thesis.
Yes, with the setup from you fiddle, it gives me
mergedatabase=# select id from myView where id = 2;
id
-----
2
102
I am using two 10.1.22 mariadb docker containers. Both with very elementary setup, the users table looks like this
create table user1 (
id INT,
dummy_data VARCHAR(50),
UNIQUE(id)
);
insert into user1 (id, dummy_data) values (1, 'Russia');
insert into user1 (id, dummy_data) values (2, 'Japan');
Replace "user1" with "user2" and drop it in the second container.
I extended the posgresql docker image (version 9.6.2) with mysql_fdw https://pastebin.com/SLcYXs6r (Dockerfile) Connect the mariadb containers on startup and paste the postgresql setup: https://pastebin.com/BsjTSK6N
I currently experience quite a strange behaviour on views, consisting from foreign tables, which differs significantly from what how the view should behave (at least from my point of view (pun intented)).
So I have this
VIEW
which performs data integration on 2 foreign tables. A simplified example can be found here: http://sqlfiddle.com/#!15/4fcfc/2When I do a
SELECT * WHERE id = 1
, I get exactly 1 result.If you replace the regular tables with foreign tables from mysql_fdw, I get 2 results from the table.
I think this is due to the fact of not having something like PostgreSQLs OID in MySQL. Is there anything which can be done in mysql_fdw to resolve this? Or is there a known workaround?