Correctly handle limit on int4 and int8 types in PG

PG doesn't register it's types using the `int(4)` format that others do.
As such, if we alias `int8` to the other integer types, the range
information is lost. This is fixed by simply registering it separately.

The other option (which I specifically chose to avoid) is to pass the
information of the original type that was being aliased as an argument.
I'd rather avoid that, since an alias should truly be treated the same.
If we need different behavior for a different type, we should explicitly
register it with that, and not have a conditional based on aliasing.

Fixes #18144

[Sean Griffin & ysbaddaden]

1 files changed, 2 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 6ef47d8a11..02cafc8079 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -445,8 +445,8 @@ module ActiveRecord
 
         def initialize_type_map(m) # :nodoc:
           register_class_with_limit m, 'int2', OID::Integer
-          m.alias_type 'int4', 'int2'
-          m.alias_type 'int8', 'int2'
+          register_class_with_limit m, 'int4', OID::Integer
+          register_class_with_limit m, 'int8', OID::Integer
           m.alias_type 'oid', 'int2'
           m.register_type 'float4', OID::Float.new
           m.alias_type 'float8', 'float4'