Many files:

  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys


innobase/btr/btr0cur.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/dict/dict0crea.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/dict/dict0dict.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/dict/dict0load.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/dict/dict0mem.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/btr0btr.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/dict0mem.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/ibuf0ibuf.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/os0file.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/os0sync.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/row0mysql.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/row0upd.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/sync0sync.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/trx0sys.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/trx0trx.h:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/ibuf0ibuf.ic:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/os0sync.ic:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/sync0sync.ic:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/include/trx0sys.ic:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/lock/lock0lock.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/pars/pars0opt.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/que/que0que.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/row/row0ins.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/row/row0mysql.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/row/row0sel.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/row/row0upd.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/srv/srv0srv.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/sync/sync0sync.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/trx/trx0sys.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys
innobase/trx/trx0trx.c:
  Implement ON DELETE CASCADE and facilitate switching off of UNIQUE constraints and foreign keys

1 files changed, 10 insertions, 0 deletions

diff --git a/innobase/include/row0upd.h b/innobase/include/row0upd.h
index 106d3866b25..9a3e2463267 100644
--- a/innobase/include/row0upd.h
+++ b/innobase/include/row0upd.h
@@ -312,6 +312,11 @@ struct upd_node_struct{
 	ibool		in_mysql_interface;
 				/* TRUE if the update node was created
 				for the MySQL interface */
+	upd_node_t*	cascade_node;/* NULL or an update node template which
+				is used to implement ON DELETE CASCADE
+				or ... SET NULL for foreign keys */
+	mem_heap_t*	cascade_heap;/* NULL or a mem heap where the cascade
+				node is created */
 	sel_node_t*	select;	/* query graph subtree implementing a base
 				table cursor: the rows returned will be
 				updated */
@@ -322,6 +327,11 @@ struct upd_node_struct{
 				of the MySQL interface */
 	dict_table_t*	table;	/* table where updated */
 	upd_t*		update;	/* update vector for the row */
+	ulint		update_n_fields;
+				/* when this struct is used to implement
+				a cascade operation for foreign keys, we store
+				here the size of the buffer allocated for use
+				as the update vector */
 	sym_node_list_t	columns;/* symbol table nodes for the columns
 				to retrieve from the table */
 	ibool		has_clust_rec_x_lock;