Update galera to work with independent sub transactions

sql/handler.cc

@@ -61,6 +61,7 @@
 #include "wsrep_xid.h"
 #include "wsrep_thd.h"
 #include "wsrep_trans_observer.h" /* wsrep transaction hooks */
+#include "wsrep_var.h"            /* wsrep_hton_check() */
 #endif /* WITH_WSREP */
 
 /**
@@ -6582,6 +6583,9 @@ int handler::ha_reset()
 static int wsrep_after_row(THD *thd)
 {
   DBUG_ENTER("wsrep_after_row");
+  if (thd->internal_transaction())
+    DBUG_RETURN(0);
+
   /* enforce wsrep_max_ws_rows */
   thd->wsrep_affected_rows++;
   if (wsrep_max_ws_rows &&

sql/sql_class.cc

@@ -5808,6 +5808,8 @@ start_new_trans::start_new_trans(THD *thd)
   server_status= thd->server_status;
   m_transaction_psi= thd->m_transaction_psi;
   thd->m_transaction_psi= 0;
+  wsrep_on= thd->variables.wsrep_on;
+  thd->variables.wsrep_on= 0;
   thd->server_status&= ~(SERVER_STATUS_IN_TRANS |
                          SERVER_STATUS_IN_TRANS_READONLY);
   thd->server_status|= SERVER_STATUS_AUTOCOMMIT;
@@ -5826,6 +5828,7 @@ void start_new_trans::restore_old_transaction()
   if (org_thd->m_transaction_psi)
     MYSQL_COMMIT_TRANSACTION(org_thd->m_transaction_psi);
   org_thd->m_transaction_psi= m_transaction_psi;
+  org_thd->variables.wsrep_on= wsrep_on;
   org_thd= 0;
 }
 

sql/sql_class.h

@@ -5170,6 +5170,7 @@ class start_new_trans
   THD *org_thd;
   uint in_sub_stmt;
   uint server_status;
+  my_bool wsrep_on;
 
 public:
   start_new_trans(THD *thd);

sql/wsrep_mysqld.cc

@@ -3075,6 +3075,7 @@ void wsrep_commit_empty(THD* thd, bool all)
   if (wsrep_is_real(thd, all) &&
       wsrep_thd_is_local(thd) &&
       thd->wsrep_trx().active() &&
+      !thd->internal_transaction() &&
       thd->wsrep_trx().state() != wsrep::transaction::s_committed)
   {
     /* @todo CTAS with STATEMENT binlog format and empty result set

sql/wsrep_trans_observer.h

@@ -34,7 +34,8 @@ void wsrep_commit_empty(THD* thd, bool all);
 static inline bool wsrep_is_active(THD* thd)
 {
   return (thd->wsrep_cs().state() != wsrep::client_state::s_none  &&
-          thd->wsrep_cs().transaction().active());
+          thd->wsrep_cs().transaction().active() &&
+          !thd->internal_transaction());
 }
 
 /*
@@ -340,6 +341,8 @@ static inline int wsrep_after_commit(THD* thd, bool all)
               (long long)wsrep_thd_trx_seqno(thd),
               wsrep_has_changes(thd));
   DBUG_ASSERT(wsrep_run_commit_hook(thd, all));
+  if (thd->internal_transaction())
+    DBUG_RETURN(0);
   int ret= 0;
   if (thd->wsrep_trx().state() == wsrep::transaction::s_committing)
   {
@@ -409,7 +412,8 @@ static inline int wsrep_after_rollback(THD* thd, bool all)
 
 static inline int wsrep_before_statement(THD* thd)
 {
-  return (thd->wsrep_cs().state() != wsrep::client_state::s_none ?
+  return (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+          !thd->internal_transaction() ?
 	  thd->wsrep_cs().before_statement() : 0);
 }
 
@@ -417,7 +421,8 @@ static inline
 int wsrep_after_statement(THD* thd)
 {
   DBUG_ENTER("wsrep_after_statement");
-  DBUG_RETURN(thd->wsrep_cs().state() != wsrep::client_state::s_none ?
+  DBUG_RETURN(thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+              !thd->internal_transaction() ?
               thd->wsrep_cs().after_statement() : 0);
 }
 
@@ -425,7 +430,8 @@ static inline void wsrep_after_apply(THD* thd)
 {
   DBUG_ASSERT(wsrep_thd_is_applying(thd));
   WSREP_DEBUG("wsrep_after_apply %lld", thd->thread_id);
-  thd->wsrep_cs().after_applying();
+  if (!thd->internal_transaction())
+    thd->wsrep_cs().after_applying();
 }
 
 static inline void wsrep_open(THD* thd)
@@ -448,7 +454,8 @@ static inline void wsrep_open(THD* thd)
 static inline void wsrep_close(THD* thd)
 {
   DBUG_ENTER("wsrep_close");
-  if (thd->wsrep_cs().state() != wsrep::client_state::s_none)
+  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+      !thd->internal_transaction())
   {
     thd->wsrep_cs().close();
   }
@@ -459,7 +466,8 @@ static inline void
 wsrep_wait_rollback_complete_and_acquire_ownership(THD *thd)
 {
   DBUG_ENTER("wsrep_wait_rollback_complete_and_acquire_ownership");
-  if (thd->wsrep_cs().state() != wsrep::client_state::s_none)
+  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+      !thd->internal_transaction())
   {
     thd->wsrep_cs().wait_rollback_complete_and_acquire_ownership();
   }
@@ -468,8 +476,9 @@ wsrep_wait_rollback_complete_and_acquire_ownership(THD *thd)
 
 static inline int wsrep_before_command(THD* thd)
 {
-  return (thd->wsrep_cs().state() != wsrep::client_state::s_none ?
-	  thd->wsrep_cs().before_command() : 0);
+  return (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+          !thd->internal_transaction() ?
+          thd->wsrep_cs().before_command() : 0);
 }
 /*
   Called after each command.
@@ -478,7 +487,8 @@ static inline int wsrep_before_command(THD* thd)
 */
 static inline void wsrep_after_command_before_result(THD* thd)
 {
-  if (thd->wsrep_cs().state() != wsrep::client_state::s_none)
+  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+      !thd->internal_transaction())
   {
     thd->wsrep_cs().after_command_before_result();
   }
@@ -486,7 +496,8 @@ static inline void wsrep_after_command_before_result(THD* thd)
 
 static inline void wsrep_after_command_after_result(THD* thd)
 {
-  if (thd->wsrep_cs().state() != wsrep::client_state::s_none)
+  if (thd->wsrep_cs().state() != wsrep::client_state::s_none &&
+      !thd->internal_transaction())
   {
     thd->wsrep_cs().after_command_after_result();
   }