MDEV-6089 - MySQL WL#7305 "Improve MDL scalability by using lock-free hash"

Replaced hash with lock-free hash.

1 files changed, 3 insertions, 1 deletions

diff --git a/sql/mdl.h b/sql/mdl.h
index ee1c418eb74..f7a5d160e53 100644
--- a/sql/mdl.h
+++ b/sql/mdl.h
@@ -28,7 +28,7 @@
 #include <my_sys.h>
 #include <m_string.h>
 #include <mysql_com.h>
-#include <hash.h>
+#include <lf.h>
 
 #include <algorithm>
 
@@ -917,6 +917,7 @@ private:
     readily available to the wait-for graph iterator.
    */
   MDL_wait_for_subgraph *m_waiting_for;
+  LF_PINS *m_pins;
 private:
   MDL_ticket *find_ticket(MDL_request *mdl_req,
                           enum_mdl_duration *duration);
@@ -924,6 +925,7 @@ private:
   void release_lock(enum_mdl_duration duration, MDL_ticket *ticket);
   bool try_acquire_lock_impl(MDL_request *mdl_request,
                              MDL_ticket **out_ticket);
+  bool fix_pins();
 
 public:
   THD *get_thd() const { return m_owner->get_thd(); }