crate / crate

CrateDB version

5.7.0-SNAPSHOT-267e58a

CrateDB setup information

local single node
Azure PostgreSQL server (remote)

Problem description

Can't query a remote postgres server when using any non-superuser

Steps to Reproduce

PostgreSQL:

CREATE TABLE georg_text (txt TEXT);
insert into georg_text values ('Hello');

CrateDB:

CREATE USER georg;
GRANT ALL TO georg;
SET SESSION AUTHORIZATION georg;
SELECT current_user;
+--------------+
| CURRENT_USER |
+--------------+
| georg        |
+--------------+
SELECT 1 row in set (0.070 sec)

CREATE SERVER azure_postgres FOREIGN DATA WRAPPER jdbc OPTIONS (url 'jdbc:postgresql://xxxxxx.postgres.database.azure.com:5432/postgres');
-- CREATE OK, 1 row affected (0.093 sec)
CREATE USER MAPPING FOR georg SERVER azure_postgres OPTIONS ("user" 'pgcrate', password  'xxxxxxxxx');
-- CREATE OK, 1 row affected (0.050 sec)
CREATE FOREIGN TABLE local_schema.georg_text (txt text) SERVER azure_postgres OPTIONS (schema_name 'public');
-- CREATE OK, 1 row affected (0.069 sec)
SELECT * FROM local_schema.georg_text;
-- UnsupportedFeatureException[Only a super user can connect to localhost unless `fdw.allow_local` is set to true]

Actual Result

UnsupportedFeatureException[Only a super user can connect to localhost unless `fdw.allow_local` is set to true]

Expected Result

+-------+
| txt   |
+-------+
| Hello |
+-------+
SELECT 1 row in set (1.167 sec)

Thanks for reporting @proddata.

The bug is caused by

crate/server/src/main/java/io/crate/fdw/JdbcForeignDataWrapper.java

Line 149 in b0133fb

uri = new URI(url);

that cannot parse jdbc:postgresql:... properly.

I think we should use something like https://jdbc.postgresql.org/documentation/publicapi/org/postgresql/Driver.html#parseURL-java.lang.String-java.util.Properties-