How to select from different tables in a VIEW based on a config value / IF condition

gistfile1.sql

-- Sneaky way to select from a specific table using a config value
-- Views do not support IF or anything else useful 

-- Obviously the table schemas need to match otherwise the UNION will fail

  SELECT t.* FROM ATable t
  INNER JOIN Config c on 'ConfigKeyToMatch' = c.ConfigKey
  WHERE c.ConfigValue = 'True'
UNION
  SELECT t.* FROM DifferentTable t
  INNER JOIN Config c on 'ConfigKeyToMatch' = c.ConfigKey
  WHERE c.ConfigValue = 'False'