Merge mysql-5.1-innodb from bk-internal to my local tree

storage/innodb_plugin/ChangeLog

@@ -5,6 +5,12 @@
 	Fix Bug#47991 InnoDB Dictionary Cache memory usage increases
 	indefinitely when renaming tables
 
+2010-06-22	The InnoDB Team
+
+	* handler/ha_innodb.cc:
+	Fix Bug#54686: "field->col->mtype == type" assertion error at
+	row/row0sel.c
+
 2010-06-21	The InnoDB Team
 
 	* dict/dict0load.c, fil/fil0fil.c:

storage/innodb_plugin/handler/ha_innodb.cc

@@ -5379,6 +5379,9 @@ ha_innobase::index_read(
 		prebuilt->index_usable = FALSE;
 		DBUG_RETURN(HA_ERR_CRASHED);
 	}
+	if (UNIV_UNLIKELY(!prebuilt->index_usable)) {
+		DBUG_RETURN(HA_ERR_TABLE_DEF_CHANGED);
+	}
 
 	/* Note that if the index for which the search template is built is not
 	necessarily prebuilt->index, but can also be the clustered index */
@@ -7221,6 +7224,10 @@ ha_innobase::records_in_range(
 		n_rows = HA_POS_ERROR;
 		goto func_exit;
 	}
+	if (UNIV_UNLIKELY(!row_merge_is_index_usable(prebuilt->trx, index))) {
+		n_rows = HA_ERR_TABLE_DEF_CHANGED;
+		goto func_exit;
+	}
 
 	heap = mem_heap_create(2 * (key->key_parts * sizeof(dfield_t)
 				    + sizeof(dtuple_t)));