get covering index reads to work by supplying the key from the index to the...

get covering index reads to work by supplying the key from the index to the read row function. addresses #705

git-svn-id: file:///svn/mysql/tokudb-engine/src@3559 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -2202,7 +2202,7 @@ int ha_tokudb::index_read(uchar * buf, const uchar * key, uint key_len, enum ha_
         error = HA_ERR_UNSUPPORTED;
         break;
     }
-    error = read_row(error, buf, active_index, &row, 0, find_flag != HA_READ_KEY_EXACT);
+    error = read_row(error, buf, active_index, &row, &last_key, find_flag != HA_READ_KEY_EXACT);
     if (error && (tokudb_debug & TOKUDB_DEBUG_ERROR))
         printf("%d:%s:%d:error:%d:%d\n", my_tid(), __FILE__, __LINE__, error, find_flag);
     TOKUDB_DBUG_RETURN(error);