Re-commit in git:

MDEV-406: ANALYZE $stmt
- Ported the old patch to new explain code
- New SQL syntax (ANALYZE $stmt)
- ANALYZE UPDATE/DELETE is now supported (because EXPLAIN UPDATE/DELETE is supported)
- Basic counters are calculated for basic kinds of queries
  (still need to see what happens with join buffer, ORDER BY...LIMIT queries, etc)

sql/sql_class.h

@@ -3959,6 +3959,18 @@ public:
   virtual void cleanup();
 };
 
+class select_send_analyze : public select_send
+{
+bool discard_data;
+  bool send_result_set_metadata(List<Item> &list, uint flags) { return 0; }
+  /* 
+    ANALYZE-todo: we should call val_int() (or val_str() or whatever) to
+    compute the columns. If we don't, it's not full execution.
+  */
+  int send_data(List<Item> &items) { return 0; }
+  bool send_eof() { return 0; }
+  void abort_result_set() {}
+};
 
 class select_to_file :public select_result_interceptor {
 protected: