Merge branch '11.8' into 12.0

main/statistics_json.result is updated for f8ba5ced55 (MDEV-36099)

The test uses 'delete from t1' in many places and then populates
the table again. The natural order of rows in a MyISAM table is well
defined and the test was implicitly relying on that.

before f8ba5ced55 delete was deleting rows one by one, using
ha_myisam::delete_row() because the connection was stuck in rbr mode.
This caused rows to be shown in the reverse insertion order (because of
the delete link list).

MDEV-36099 fixes this bug and the server now correctly uses
ha_myisam::delete_all_rows(). This makes rows to be shown in the
insertion order as expected.

sql/sql_class.h

@@ -5822,6 +5822,7 @@ public:
   TMP_TABLE_SHARE *find_tmp_table_share(const char *key, size_t key_length);
 
   bool open_temporary_table(TABLE_LIST *tl);
+  bool check_and_open_tmp_table(TABLE_LIST *tl);
   bool open_temporary_tables(TABLE_LIST *tl);
 
   bool close_temporary_tables();
@@ -5926,7 +5927,6 @@ public:
   uint32                    wsrep_rand;
   rpl_group_info            *wsrep_rgi;
   bool                      wsrep_converted_lock_session;
-  char                      wsrep_info[128]; /* string for dynamic proc info */
   ulong                     wsrep_retry_counter; // of autocommit
   bool                      wsrep_PA_safe;
   char*                     wsrep_retry_query;
@@ -6237,6 +6237,18 @@ public:
       return false;
     return !is_set_timestamp_forbidden(this);
   }
+
+  /**
+    @brief
+    Return true if current statement uses cursor protocol for execution.
+
+    @details
+    Cursor protocol execution is determined by checking if lex->result is a
+    Select_materialize object, which is exclusively used by the server for
+    cursor result set materialization.
+  */
+  bool is_cursor_execution() const;
+
   /*
     Return true if we are in stored procedure, not in a function or
     trigger.
@@ -6247,6 +6259,8 @@ public:
             !(in_sub_stmt & (SUB_STMT_FUNCTION | SUB_STMT_TRIGGER)));
   }
 
+  bool reparsing_sp_stmt= {false};
+
   /* Data and methods for bulk multiple unit result reporting */
   DYNAMIC_ARRAY *unit_results;
   void stop_collecting_unit_results();