Comparison of tables during altering fixed. (BUG#39399)

mysql-test/r/maria.result:
  Test suite of BUG#39399.
mysql-test/t/maria.test:
  Test suite of BUG#39399.
storage/maria/ha_maria.cc:
  Comparison of tables during altering fixed. (BUG#39399)
  Unused function parameter removed.

mysql-test/r/maria.result

@@ -2284,3 +2284,9 @@ insert into v1 (f1) values (3) on duplicate key update f1= f3 + 10;
 insert into v1 (f1) values (3) on duplicate key update f1= f3 + 10;
 drop table t1,t2;
 drop view v1;
+CREATE TABLE t1 (id int, c varchar(10)) engine=maria;
+INSERT INTO t1 VALUES (1,"1");
+ALTER TABLE t1 CHANGE c d varchar(10);
+affected rows: 0
+info: Records: 0  Duplicates: 0  Warnings: 0
+drop table t1;

mysql-test/t/maria.test

@@ -1575,3 +1575,14 @@ insert into v1 (f1) values (3) on duplicate key update f1= f3 + 10;
 insert into v1 (f1) values (3) on duplicate key update f1= f3 + 10;
 drop table t1,t2;
 drop view v1;
+
+#
+# BUG#39399 ALTER TABLE renaming column: affected_rows > 0
+#
+
+CREATE TABLE t1 (id int, c varchar(10)) engine=maria;
+INSERT INTO t1 VALUES (1,"1");
+--enable_info
+ALTER TABLE t1 CHANGE c d varchar(10);
+--disable_info
+drop table t1;

storage/maria/ha_maria.cc

@@ -2605,10 +2605,9 @@ enum row_type ha_maria::get_row_type() const
 }
 
 
-static enum data_file_type maria_row_type(HA_CREATE_INFO *info,
-                                          my_bool ignore_transactional)
+static enum data_file_type maria_row_type(HA_CREATE_INFO *info)
 {
-  if (info->transactional == HA_CHOICE_YES && ! ignore_transactional)
+  if (info->transactional == HA_CHOICE_YES)
     return BLOCK_RECORD;
   switch (info->row_type) {
   case ROW_TYPE_FIXED:   return STATIC_RECORD;
@@ -2641,7 +2640,7 @@ int ha_maria::create(const char *name, register TABLE *table_arg,
     }
   }
   /* Note: BLOCK_RECORD is used if table is transactional */
-  row_type= maria_row_type(ha_create_info, 0);
+  row_type= maria_row_type(ha_create_info);
   if (ha_create_info->transactional == HA_CHOICE_YES &&
       ha_create_info->row_type != ROW_TYPE_PAGE &&
       ha_create_info->row_type != ROW_TYPE_NOT_USED &&
@@ -2825,15 +2824,15 @@ bool ha_maria::check_if_incompatible_data(HA_CREATE_INFO *create_info,
   if (create_info->auto_increment_value != stats.auto_increment_value ||
       create_info->data_file_name != data_file_name ||
       create_info->index_file_name != index_file_name ||
-      (maria_row_type(create_info,  1) != data_file_type &&
+      (maria_row_type(create_info) != data_file_type &&
        create_info->row_type != ROW_TYPE_DEFAULT) ||
       table_changes == IS_EQUAL_NO ||
       table_changes & IS_EQUAL_PACK_LENGTH) // Not implemented yet
     return COMPATIBLE_DATA_NO;
 
-  if ((options & (HA_OPTION_PACK_RECORD | HA_OPTION_CHECKSUM |
+  if ((options & (HA_OPTION_CHECKSUM |
                   HA_OPTION_DELAY_KEY_WRITE)) !=
-      (create_info->table_options & (HA_OPTION_PACK_RECORD | HA_OPTION_CHECKSUM |
+      (create_info->table_options & (HA_OPTION_CHECKSUM |
                               HA_OPTION_DELAY_KEY_WRITE)))
     return COMPATIBLE_DATA_NO;
   return COMPATIBLE_DATA_YES;