Bug#30437378 : ASSERTION N_EXT == DTUPLE->GET_N_EXT() AT

               REC_GET_CONVERTED_SIZE() IN REM0REC.IC

Issue :
 In function row_upd_clust_rec_by_insert, n_ext value being
 passed to lower level functions wasn't correct. Expected value
 is total number of ext fields whereas value being passed was
 the number of fields part of index.

Fix :
 Pass the correct value of total number of ext fields.

Reviewed by : Annamalai Gurusami <[email protected]>

Author: mayprasa

storage/innobase/row/row0mysql.cc

@@ -2326,8 +2326,7 @@ row_update_for_mysql_using_cursor(
 			if (!dict_index_is_auto_gen_clust(index)) {
 				err = row_ins_clust_index_entry(
 					index, entry, thr,
-					node->upd_ext
-					? node->upd_ext->n_ext : 0,
+					entry->get_n_ext(),
 					true);
 			}
 		} else {
@@ -2353,7 +2352,7 @@ row_update_for_mysql_using_cursor(
 
 			err = row_ins_clust_index_entry(
 				index, entry, thr,
-				node->upd_ext ? node->upd_ext->n_ext : 0,
+				entry->get_n_ext(),
 				false);
 			/* Commit the open mtr as we are processing UPDATE. */
 			if (index->last_ins_cur) {

storage/innobase/row/row0upd.cc

@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1996, 2018, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 1996, 2019, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License, version 2.0,
@@ -2589,7 +2589,7 @@ row_upd_clust_rec_by_insert(
 
 	err = row_ins_clust_index_entry(
 		index, entry, thr,
-		node->upd_ext ? node->upd_ext->n_ext : 0, false);
+		entry->get_n_ext(), false);
 	node->state = UPD_NODE_INSERT_CLUSTERED;
 
 	mem_heap_free(heap);