diff --git a/sqlalchemy_iris/base.py b/sqlalchemy_iris/base.py
index c4cae54..14e9213 100644
--- a/sqlalchemy_iris/base.py
+++ b/sqlalchemy_iris/base.py
@@ -1443,12 +1443,6 @@ def get_multi_foreign_keys(
                     key_constraints.c.table_name.in_(all_objects),
                 )
             )
-            .group_by(
-                key_constraints.c.table_name,
-                key_constraints.c.constraint_name,
-                key_constraints.c.column_name,
-                key_constraints_ref.c.table_schema
-            )
             .order_by(
                 key_constraints.c.constraint_name,
                 key_constraints.c.ordinal_position,
@@ -1612,12 +1606,10 @@ def get_multi_columns(
             ):
                 if charlen == -1:
                     charlen = None
+                try:
+                    kwargs["length"] = int(charlen)
+                except ValueError:
                     kwargs["length"] = 0
-                else:
-                    try:
-                        kwargs["length"] = int(charlen)
-                    except ValueError:
-                        kwargs["length"] = 0
                 if collation:
                     kwargs["collation"] = collation
             if coltype is None: