Fix/oracle bug with xmlspaces (#895)

* Address issue with whitespace in XML.
Cursor describe is ignoring whitespace so max len of column with value ' t ' is showing as 1.
XMLTABLE when extracting values from tag with whitespaces its ignoring them. It works properly if there is any character there e.g ' t '.

* Update tests

source/expectations/data_values/ut_compound_data_helper.pkb

@@ -235,6 +235,8 @@ create or replace package body ut_compound_data_helper is
       l_col_type := 'VARCHAR2(50)';
     elsif  a_data_info.is_sql_diffable = 1  and type_no_length(a_data_info.column_type) then
       l_col_type := a_data_info.column_type;
+    elsif a_data_info.is_sql_diffable = 1  and a_data_info.column_type in ('VARCHAR2','CHAR') then
+      l_col_type := 'VARCHAR2('||greatest(a_data_info.column_len,4000)||')';
     else 
       l_col_type := a_data_info.column_type
         ||case when a_data_info.column_len is not null

source/expectations/data_values/ut_data_value_refcursor.tpb

@@ -49,15 +49,22 @@ create or replace type body ut_data_value_refcursor as
     dbms_xmlgen.setNullHandling(l_ctx, dbms_xmlgen.empty_tag);
     dbms_xmlgen.setMaxRows(l_ctx, c_bulk_rows);   
     loop
-      l_xml := dbms_xmlgen.getxmltype(l_ctx);
+      l_xml := dbms_xmlgen.getxmltype(l_ctx);      
       exit when dbms_xmlgen.getNumRowsProcessed(l_ctx) = 0;
+      --Bug in oracle 12.2+ where XML binary storage trimming insignificant whitespaces.
+      $if dbms_db_version.version = 12 and dbms_db_version.release >= 2 or dbms_db_version.version > 12 $then
+        l_xml := xmltype( replace(l_xml.getClobVal(),'<ROWSET','<ROWSET xml:space=''preserve'''));
+      $else
+        null;
+      $end
       l_elements_count := l_elements_count + dbms_xmlgen.getNumRowsProcessed(l_ctx);
       execute immediate
       'insert into ' || l_ut_owner || '.ut_compound_data_tmp(data_id, item_no, item_data) ' ||
       'values (:self_guid, :self_row_count, :l_xml)'
-      using in self.data_id, l_set_id, l_xml;           
+      using in self.data_id, l_set_id, l_xml;       
       l_set_id := l_set_id + c_bulk_rows;   
     end loop;
+
     ut_expectation_processor.reset_nls_params();
     dbms_xmlgen.closeContext(l_ctx);
     self.elements_count := l_elements_count;
@@ -317,8 +324,7 @@ create or replace type body ut_data_value_refcursor as
         l_cursor := ut_compound_data_helper.get_compare_cursor(a_diff_cursor_text,
           a_self.data_id, a_other.data_id);
         --fetch and save rows for display of diff
-        fetch l_cursor bulk collect into l_diff_tab limit ut_utils.gc_diff_max_rows;
-
+        fetch l_cursor bulk collect into l_diff_tab limit ut_utils.gc_diff_max_rows;      
       exception when others then
         if l_cursor%isopen then
           close l_cursor;

test/ut3_user/expectations/test_expectations_cursor.pkb

@@ -2676,6 +2676,91 @@ Check the query and data for errors.';
    ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_equal(0);
 
   end;  
+
+
+  procedure insginificant_whitespace1 is
+    l_actual   sys_refcursor;
+    l_expected sys_refcursor;
+  begin
+    open l_expected for
+      select column_value t1 from table(ut_varchar2_list(''));
+
+	open l_actual for
+	  select column_value t1 from table(ut_varchar2_list(' '));
+    --Assert
+    ut3.ut.expect( l_actual ).to_equal( l_expected );
+	ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_be_greater_than(0);
+  end; 
+
+  procedure insginificant_whitespace2 is
+    l_actual   sys_refcursor;
+    l_expected sys_refcursor;
+  begin
+    open l_expected for
+      select ' t ' t1 from dual;
+
+	open l_actual for
+	  select 't' t1 from dual;
+    --Assert
+    ut3.ut.expect( l_actual ).to_equal( l_expected );
+	ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_be_greater_than(0);
+  end; 
+
+  procedure insginificant_whitespace3 is
+    l_actual   sys_refcursor;
+    l_expected sys_refcursor;
+  begin
+    open l_expected for
+      select 't ' t1 from dual;
+
+	open l_actual for
+	  select 't' t1 from dual;
+    --Assert
+    ut3.ut.expect( l_actual ).to_equal( l_expected );
+	ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_be_greater_than(0);
+  end;
+
+  procedure insginificant_whitespace4 is
+    l_actual   sys_refcursor;
+    l_expected sys_refcursor;
+  begin
+    open l_expected for
+      select ' t' t1 from dual;
+
+	open l_actual for
+	  select 't' t1 from dual;
+    --Assert
+    ut3.ut.expect( l_actual ).to_equal( l_expected );
+	ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_be_greater_than(0);
+  end;     
+
+  procedure insginificant_whitespace5 is
+    l_actual   sys_refcursor;
+    l_expected sys_refcursor;
+  begin
+    open l_expected for
+      select ' ' t1 from dual;
+
+	open l_actual for
+	  select '' t1 from dual;
+    --Assert
+    ut3.ut.expect( l_actual ).to_equal( l_expected );
+	ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_be_greater_than(0);
+  end; 
 
+  procedure nulltowhitespace is
+    l_actual   sys_refcursor;
+    l_expected sys_refcursor;
+  begin
+    open l_expected for
+      select cast(null as varchar2(2)) t1 from dual;
+
+	open l_actual for
+	  select ' ' t1 from dual;
+    --Assert
+    ut3.ut.expect( l_actual ).to_equal( l_expected );
+	ut.expect(ut3_tester_helper.main_helper.get_failed_expectations_num).to_be_greater_than(0);
+  end;   
+
 end;
 /

test/ut3_user/expectations/test_expectations_cursor.pks

@@ -418,5 +418,30 @@ create or replace package test_expectations_cursor is
   --%test(Check that column name accept non xml characters fix #902)
   procedure nonxmlchar_part_of_colname;
 
+
+  /*Oracle Bug not readin properly in xmltable */
+  --%test ( Compare insiginificant whitespaces scenario 1 )
+  --%disabled
+  procedure insginificant_whitespace1;
+
+  --%test ( Compare insiginificant whitespaces scenario 2 )
+  procedure insginificant_whitespace2;
+
+  --%test ( Compare insiginificant whitespaces scenario 3 )
+  procedure insginificant_whitespace3;
+
+  --%test ( Compare insiginificant whitespaces scenario 4 )
+  procedure insginificant_whitespace4; 
+
+  /*Oracle Bug not readin properly in xmltable */
+  --%test ( Compare insiginificant whitespaces scenario 5 )
+  --%disabled
+  procedure insginificant_whitespace5;
+
+  /*Oracle Bug not readin properly in xmltable */
+  --%test ( Compare null to whitespace )
+  --%disabled
+  procedure nulltowhitespace;
+
 end;
 /