Redshift connection fails with CURRENT_SETTING('server_version')

[jaakla]

AWS Redshift should use postgres-compatible API, therefore ATTACH ... TYPE POSTGRES would be expected to worth to try.

It does seem to connect and authenticate in lower level, but then fails with error: SQL Error: Invalid Error: Failed to execute query "SELECT CURRENT_SETTING('server_version'), (SELECT COUNT(*) FROM pg_settings WHERE name LIKE 'rds%')": ERROR: must be superuser to examine "server_version"

The first query directly in Redshift (SELECT CURRENT_SETTING('server_version')) is rejected for my (typical user) permissions indeed. The second one (SELECT COUNT(*) FROM pg_settings WHERE name LIKE 'rds%') works but returns 0 for me. I'm not sure what it is supposed to query here. As replacement for first I could use SELECT version(); successfully, this returns 'PostgreSQL 8.0.2 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.4.2 20041017 (Red Hat 3.4.2-6.fc3), Redshift 1.0.71629�'

So why not use SELECT version();

[jaakla]

duplicate of #181