Fix OAuth and Realtime issues introduced in 9a515b9234eeb2e500e88899fb31f64535b618cc
[DATABASE] Fix an empty default value mistake introduced in
fde929b151f2b286cb60d226c47570209199c9c5
[DATABASE][PostgreSQL] Avoid use of pg_constraint.consrc, which was removed in
PostgreSQL 12.
[DATABASE][MariaDB] Fix a typo introduced in aed2344bd4c512dae48d1a5bd2eda218f914ae11
[DAEMON] Wrap an assignment inside "switch":
a follow-up to adc689cb15d611c83ebb9c5aaeaa1008ec14da28
