Fixed a bug with big result sets and UNION's

BitKeeper/etc/ignore:
  Added mysys/getopt.c mysys/getopt1.c to the ignore list

.bzrignore

@@ -469,3 +469,5 @@ vio/test-ssl
 vio/test-sslclient
 vio/test-sslserver
 vio/viotest-ssl
+mysys/getopt.c
+mysys/getopt1.c

sql/sql_class.h

@@ -182,7 +182,7 @@ typedef struct st_copy_info {
   ha_rows copied;
   ha_rows error;
   enum enum_duplicates handle_duplicates;
-  int escape_char;
+  int escape_char, errorno;
 } COPY_INFO;
 
 
@@ -666,6 +666,7 @@ class select_union :public select_result {
   TABLE *table;
   COPY_INFO info;
   uint save_time_stamp;
+  TMP_TABLE_PARAM *tmp_table_param;
 
   select_union(TABLE *table_par);
   ~select_union();

sql/sql_insert.cc

@@ -447,6 +447,7 @@ int write_record(TABLE *table,COPY_INFO *info)
 err:
   if (key)
     my_afree(key);
+  info->errorno= error;
   table->file->print_error(error,MYF(0));
   return 1;
 }

sql/sql_union.cc

@@ -132,7 +132,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
     goto exit;
   }
   union_result->save_time_stamp=!describe;
-
+  union_result->tmp_table_param=&tmp_table_param;
   for (sl= &lex->select_lex; sl; sl=sl->next)
   {
     lex->select=sl;
@@ -253,7 +253,12 @@ bool select_union::send_data(List<Item> &values)
     return 0;
   }
   fill_record(table->field,values);
-  return write_record(table,&info) ? 1 : 0;
+  if ((write_record(table,&info)))
+  {
+    if (create_myisam_from_heap(table, tmp_table_param, info.errorno, 0))
+      return 1;
+  }
+  return 0;
 }
 
 bool select_union::send_eof()