Merge 10.2 into bb-10.2-ext

Author: dr-m

storage/innobase/btr/btr0cur.cc

@@ -3,7 +3,7 @@
 Copyright (c) 1994, 2016, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2008, Google Inc.
 Copyright (c) 2012, Facebook Inc.
-Copyright (c) 2015, 2017, MariaDB Corporation.
+Copyright (c) 2015, 2018, MariaDB Corporation.
 
 Portions of this file contain modifications contributed and copyrighted by
 Google, Inc. Those modifications are gratefully acknowledged and are described
@@ -3692,34 +3692,38 @@ btr_cur_update_in_place(
 	      || row_get_rec_trx_id(rec, index, offsets));
 
 #ifdef BTR_CUR_HASH_ADAPT
-	if (block->index) {
-		/* TO DO: Can we skip this if none of the fields
-		index->search_info->curr_n_fields
-		are being updated? */
-
-		/* The function row_upd_changes_ord_field_binary works only
-		if the update vector was built for a clustered index, we must
-		NOT call it if index is secondary */
-
-		if (!dict_index_is_clust(index)
-		    || row_upd_changes_ord_field_binary(index, update, thr,
-							NULL, NULL)) {
-
-			/* Remove possible hash index pointer to this record */
-			btr_search_update_hash_on_delete(cursor);
+	{
+		rw_lock_t* ahi_latch = block->index
+			? btr_get_search_latch(block->index) : NULL;
+		if (ahi_latch) {
+			/* TO DO: Can we skip this if none of the fields
+			index->search_info->curr_n_fields
+			are being updated? */
+
+			/* The function row_upd_changes_ord_field_binary
+			does not work on a secondary index. */
+
+			if (!dict_index_is_clust(index)
+			    || row_upd_changes_ord_field_binary(
+				    index, update, thr, NULL, NULL)) {
+
+				/* Remove possible hash index pointer
+				to this record */
+				btr_search_update_hash_on_delete(cursor);
+			}
 		}
 
-		btr_search_x_lock(index);
-	}
+		rw_lock_x_lock(ahi_latch);
 
-	assert_block_ahi_valid(block);
+		assert_block_ahi_valid(block);
 #endif /* BTR_CUR_HASH_ADAPT */
 
-	row_upd_rec_in_place(rec, index, offsets, update, page_zip);
+		row_upd_rec_in_place(rec, index, offsets, update, page_zip);
 
 #ifdef BTR_CUR_HASH_ADAPT
-	if (block->index) {
-		btr_search_x_unlock(index);
+		if (ahi_latch) {
+			rw_lock_x_unlock(ahi_latch);
+		}
 	}
 #endif /* BTR_CUR_HASH_ADAPT */