MDEV-16093 Memory leak with triggers

Problem was that blob memory allocated in Table_trigger_list was not
properly freed

1 files changed, 6 insertions, 0 deletions

diff --git a/sql/sql_trigger.cc b/sql/sql_trigger.cc
index 293a4c17156..bbcc75718a3 100644
--- a/sql/sql_trigger.cc
+++ b/sql/sql_trigger.cc
@@ -614,6 +614,7 @@ end:
 #endif /* WITH_WSREP */
 }
 
+
 /**
   Build stmt_query to write it in the bin-log
   and get the trigger definer.
@@ -1061,6 +1062,11 @@ Table_triggers_list::~Table_triggers_list()
     for (int j= 0; j < (int)TRG_ACTION_MAX; j++)
       delete bodies[i][j];
 
+  /* Free blobs used in insert */
+  if (record0_field)
+    for (Field **fld_ptr= record0_field; *fld_ptr; fld_ptr++)
+      (*fld_ptr)->free();
+
   if (record1_field)
     for (Field **fld_ptr= record1_field; *fld_ptr; fld_ptr++)
       delete *fld_ptr;