Fix XMLType parameter and return value handling on Oracle 12c+

Oracle 12c+ reports XMLType parameters with data_type OPAQUE/XMLTYPE
in ALL_ARGUMENTS (changed from UNDEFINED in Oracle 11g). Handle this
new data_type in add_argument, add_return_variable, return_variable_value,
MATCHING_TYPES, and plsql_to_ruby_data_type.

This fixes the XMLType tests that were skipped since issue #114.

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

Author: yahonda

lib/plsql/oci_connection.rb

@@ -157,7 +157,7 @@ def plsql_to_ruby_data_type(metadata)
         [DateTime, nil]
       when "TIMESTAMP", "TIMESTAMP WITH TIME ZONE", "TIMESTAMP WITH LOCAL TIME ZONE"
         [Time, nil]
-      when "TABLE", "VARRAY", "OBJECT", "XMLTYPE"
+      when "TABLE", "VARRAY", "OBJECT", "XMLTYPE", "OPAQUE/XMLTYPE"
         # create Ruby class for collection
         klass = OCI8::Object::Base.get_class_by_typename(metadata[:sql_type_name])
         unless klass

lib/plsql/procedure_call.rb

@@ -115,7 +115,7 @@ def get_overload_from_arguments_list(args)
       MATCHING_TYPES = {
         integer: ["NUMBER", "NATURAL", "NATURALN", "POSITIVE", "POSITIVEN", "SIGNTYPE", "SIMPLE_INTEGER", "PLS_INTEGER", "BINARY_INTEGER"],
         decimal: ["NUMBER", "BINARY_FLOAT", "BINARY_DOUBLE"],
-        string: ["VARCHAR", "VARCHAR2", "NVARCHAR2", "CHAR", "NCHAR", "CLOB", "BLOB", "XMLTYPE"],
+        string: ["VARCHAR", "VARCHAR2", "NVARCHAR2", "CHAR", "NCHAR", "CLOB", "BLOB", "XMLTYPE", "OPAQUE/XMLTYPE"],
         date: ["DATE"],
         time: ["DATE", "TIMESTAMP", "TIMESTAMP WITH TIME ZONE", "TIMESTAMP WITH LOCAL TIME ZONE"],
         boolean: ["PL/SQL BOOLEAN"],
@@ -240,8 +240,8 @@ def add_argument(argument, value, argument_metadata = nil)
           @bind_values[argument] = value.nil? ? nil : (value ? 1 : 0)
           @bind_metadata[argument] = argument_metadata.merge(data_type: "NUMBER", data_precision: 1)
           "l_#{argument}"
-        when "UNDEFINED"
-          if argument_metadata[:type_name] == "XMLTYPE"
+        when "UNDEFINED", "XMLTYPE", "OPAQUE/XMLTYPE"
+          if argument_metadata[:type_name] == "XMLTYPE" || argument_metadata[:data_type] =~ /XMLTYPE/
             @declare_sql << "l_#{argument} XMLTYPE;\n"
             @assignment_sql << "l_#{argument} := XMLTYPE(:#{argument});\n" if not value.nil?
             @bind_values[argument] = value if not value.nil?
@@ -395,8 +395,8 @@ def add_return_variable(argument, argument_metadata, is_return_value = false)
             end
           end
           "l_#{argument} := " if is_return_value
-        when "UNDEFINED"
-          if argument_metadata[:type_name] == "XMLTYPE"
+        when "UNDEFINED", "XMLTYPE", "OPAQUE/XMLTYPE"
+          if argument_metadata[:type_name] == "XMLTYPE" || argument_metadata[:data_type] =~ /XMLTYPE/
             @declare_sql << "l_#{argument} XMLTYPE;\n" if is_return_value
             bind_variable = :"o_#{argument}"
             @return_vars << bind_variable
@@ -517,8 +517,8 @@ def return_variable_value(argument, argument_metadata)
         when "PL/SQL BOOLEAN"
           numeric_value = @cursor[":o_#{argument}"]
           numeric_value.nil? ? nil : numeric_value == 1
-        when "UNDEFINED"
-          if argument_metadata[:type_name] == "XMLTYPE"
+        when "UNDEFINED", "XMLTYPE", "OPAQUE/XMLTYPE"
+          if argument_metadata[:type_name] == "XMLTYPE" || argument_metadata[:data_type] =~ /XMLTYPE/
             @cursor[":o_#{argument}"]
           end
         else

spec/plsql/procedure_spec.rb

@@ -238,9 +238,6 @@
   describe "Function or procedure with XMLType parameters" do
     before(:all) do
       plsql.connect! CONNECTION_PARAMS
-      @oracle12c_or_higher = !! plsql.connection.select_all(
-        "select * from product_component_version where product like 'Oracle%' and to_number(substr(version,1,2)) >= 12")
-      skip "Skip until furtuer investigation for #114" if @oracle12c_or_higher
       plsql.execute <<-SQL
         CREATE OR REPLACE FUNCTION test_xmltype
           ( p_xml XMLTYPE )
@@ -261,8 +258,8 @@
     end
 
     after(:all) do
-      plsql.execute "DROP FUNCTION test_xmltype" unless @oracle12c_or_higher
-      plsql.execute "DROP PROCEDURE test_xmltype2" unless @oracle12c_or_higher
+      plsql.execute "DROP FUNCTION test_xmltype" rescue nil
+      plsql.execute "DROP PROCEDURE test_xmltype2" rescue nil
       plsql.logoff
     end