Merge branch 'issue/17' into 'master'

Issue #17: Fix MonetDB compatibility issues

See merge request !24
2 jobs for master in 1 minute and 2 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
passed #38303
monet debian
monet_test

00:00:57

passed #38302
postgres debian
postgres_test

00:01:02