Change THD->transaction to a pointer to enable multiple transactions

All changes (except one) is of type
thd->transaction.  -> thd->transaction->

thd->transaction points by default to 'thd->default_transaction'
This allows us to 'easily' have multiple active transactions for a
THD object, like when reading data from the mysql.proc table

1 files changed, 2 insertions, 2 deletions

diff --git a/sql/sql_sequence.cc b/sql/sql_sequence.cc
index f41221e11de..45bc519816a 100644
--- a/sql/sql_sequence.cc
+++ b/sql/sql_sequence.cc
@@ -437,7 +437,7 @@ int SEQUENCE::read_initial_values(TABLE *table)
     MYSQL_LOCK *lock;
     bool mdl_lock_used= 0;
     THD *thd= table->in_use;
-    bool has_active_transaction= !thd->transaction.stmt.is_empty();
+    bool has_active_transaction= !thd->transaction->stmt.is_empty();
     /*
       There is already a mdl_ticket for this table. However, for list_fields
       the MDL lock is of type MDL_SHARED_HIGH_PRIO which is not usable
@@ -490,7 +490,7 @@ int SEQUENCE::read_initial_values(TABLE *table)
       But we also don't want to commit the stmt transaction while in a
       substatement, see MDEV-15977.
     */
-    if (!has_active_transaction && !thd->transaction.stmt.is_empty() &&
+    if (!has_active_transaction && !thd->transaction->stmt.is_empty() &&
         !thd->in_sub_stmt)
       trans_commit_stmt(thd);
   }