# Return version() as a list of integers [major, minor, patch]
create or replace function semver() as
  version().regexp_extract('v[0-9.]*')[2:].split('.')
  .list_transform(x->cast(x as INTEGER));

# semversion should be a list of integers [major, minor, patch]
create or replace function errorIfBefore(semversion) as
  if (semver() <= semversion, error( version() || ' is too old'), null);

select errorIfBefore([1,1,5]);