Remap TIMESTAMP(n) WITH LOCAL TIME ZONE to standard form

Oracle 18c and later reports the data type as "TIMESTAMP(6) WITH
LOCAL TIME ZONE" in ALL_TAB_COLS, whereas older versions used
"TIMESTAMP WITH LOCAL TIME ZONE". Normalize to the standard form
to avoid type conversion errors.

Based on rsim#208

Co-Authored-By: Jochen Schug <4573581+joschug@users.noreply.github.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

lib/plsql/procedure.rb

@@ -397,6 +397,10 @@ def get_field_definitions(argument_metadata) # :nodoc:
 
           col_no, col_name, col_type_name, col_length, col_precision, col_scale, col_char_length, col_char_used = r
 
+          if col_type_name =~ /\ATIMESTAMP\(\d+\) WITH LOCAL TIME ZONE\z/
+            col_type_name = "TIMESTAMP WITH LOCAL TIME ZONE"
+          end
+
           fields[col_name.downcase.to_sym] = {
             position: col_no.to_i,
             data_type: col_type_name,

spec/plsql/procedure_spec.rb

@@ -2385,3 +2385,37 @@ def new_candidate(status)
     expect { plsql.test_func(p_STRING: "xxx") }.not_to raise_error
   end
 end
+
+describe "Function with table type containing TIMESTAMP WITH LOCAL TIME ZONE" do
+  before(:all) do
+    plsql.connect! CONNECTION_PARAMS
+    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;
+      END;
+    SQL
+  end
+
+  after(:all) do
+    plsql.execute "DROP PACKAGE test_timestamp_ltz_pkg" 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
+    metadata = plsql.test_timestamp_ltz_pkg.test_fn.arguments
+    return_metadata = PLSQL::Procedure.find(plsql, :test_fn, "TEST_TIMESTAMP_LTZ_PKG")
+    fields = return_metadata.return[0][:element][:fields]
+    expect(fields[:ts][:data_type]).to eq("TIMESTAMP WITH LOCAL TIME ZONE")
+  end
+end