Fix for bug #40053: 'check table .. for upgrade' doesn't detect

collation change made in 5.1.24-rc

Problem: 'CHECK TABLE ... FOR UPGRADE' did not check for 
incompatible collation changes made in MySQL 5.1.24-rc.

Fix: add the check.


sql/handler.cc:
    - check for incompatible collation changes made in 5.1.24-rc:
  bug #27877:
    utf8_general_ci
    ucs2_general_ci

sql/handler.cc

@@ -2765,7 +2765,7 @@ int handler::check_collation_compatibility()
 {
   ulong mysql_version= table->s->mysql_version;
 
-  if (mysql_version < 50048)
+  if (mysql_version < 50124)
   {
     KEY *key= table->key_info;
     KEY *key_end= key + table->s->keys;
@@ -2779,7 +2779,7 @@ int handler::check_collation_compatibility()
           continue;
         Field *field= table->field[key_part->fieldnr - 1];
         uint cs_number= field->charset()->number;
-        if (mysql_version < 50048 &&
+        if ((mysql_version < 50048 &&
              (cs_number == 11 || /* ascii_general_ci - bug #29499, bug #27562 */
               cs_number == 41 || /* latin7_general_ci - bug #29461 */
               cs_number == 42 || /* latin7_general_cs - bug #29461 */
@@ -2787,7 +2787,10 @@ int handler::check_collation_compatibility()
               cs_number == 21 || /* latin2_hungarian_ci - bug #29461 */
               cs_number == 22 || /* koi8u_general_ci - bug #29461 */
               cs_number == 23 || /* cp1251_ukrainian_ci - bug #29461 */
-             cs_number == 26))  /* cp1250_general_ci - bug #29461 */
+              cs_number == 26)) || /* cp1250_general_ci - bug #29461 */
+             (mysql_version < 50124 &&
+             (cs_number == 33 || /* utf8_general_ci - bug #27877 */
+              cs_number == 35))) /* ucs2_general_ci - bug #27877 */
           return HA_ADMIN_NEEDS_UPGRADE;
       }  
     }