Use standalone function with %ROWTYPE parameter for TIMESTAMP LTZ test

The previous test used a pipelined function inside a package, which
has a different metadata path that does not populate field definitions
for TABLE OF %ROWTYPE elements. Use a standalone function with a
%ROWTYPE parameter instead, which directly exercises the
get_field_definitions code path where the remap is applied.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

spec/plsql/procedure_spec.rb

@@ -2386,37 +2386,31 @@ def new_candidate(status)
   end
 end
 
-describe "Function with table type containing TIMESTAMP WITH LOCAL TIME ZONE" do
+describe "Function with TIMESTAMP WITH LOCAL TIME ZONE column in %ROWTYPE" do
   before(:all) do
     plsql.connect! CONNECTION_PARAMS
-    plsql.execute "DROP PACKAGE test_timestamp_ltz_pkg" rescue nil
+    plsql.execute "DROP FUNCTION test_timestamp_ltz_fn" rescue nil
     plsql.execute "DROP TABLE test_timestamp_ltz" rescue nil
     plsql.execute "CREATE TABLE test_timestamp_ltz (id NUMBER, ts TIMESTAMP WITH LOCAL TIME ZONE)"
     plsql.execute <<-SQL
-      CREATE OR REPLACE PACKAGE test_timestamp_ltz_pkg IS
-        TYPE t_tab IS TABLE OF test_timestamp_ltz%ROWTYPE;
-        FUNCTION test_fn RETURN t_tab PIPELINED;
-      END;
-    SQL
-    plsql.execute <<-SQL
-      CREATE OR REPLACE PACKAGE BODY test_timestamp_ltz_pkg IS
-        FUNCTION test_fn RETURN t_tab PIPELINED IS
-        BEGIN
-          NULL;
-        END;
+      CREATE OR REPLACE FUNCTION test_timestamp_ltz_fn(p_rec test_timestamp_ltz%ROWTYPE)
+        RETURN NUMBER
+      IS
+      BEGIN
+        RETURN p_rec.id;
       END;
     SQL
   end
 
   after(:all) do
-    plsql.execute "DROP PACKAGE test_timestamp_ltz_pkg" rescue nil
+    plsql.execute "DROP FUNCTION test_timestamp_ltz_fn" rescue nil
     plsql.execute "DROP TABLE test_timestamp_ltz" rescue nil
     plsql.logoff
   end
 
   it "should remap TIMESTAMP(n) WITH LOCAL TIME ZONE to TIMESTAMP WITH LOCAL TIME ZONE" do
-    return_metadata = PLSQL::Procedure.find(plsql, :test_fn, "TEST_TIMESTAMP_LTZ_PKG")
-    fields = return_metadata.return[0][:element][:fields]
+    procedure = PLSQL::Procedure.find(plsql, :test_timestamp_ltz_fn)
+    fields = procedure.arguments[0][:p_rec][:fields]
     expect(fields[:ts][:data_type]).to eq("TIMESTAMP WITH LOCAL TIME ZONE")
   end
 end