From 7533d92b23384ca2baed08521519715bf1a90337 Mon Sep 17 00:00:00 2001
From: "ingo@mysql.com" <>
Date: Mon, 7 Nov 2005 18:31:48 +0100
Subject: [PATCH] Bug#13707 - Server crash with INSERT DELAYED on MyISAM table
 Initialized 'ptr' for a newly instantiated varstring field. This is required
 by INSERT DELAYED.

No test case. This is a migration issue. There are two shell
scripts attached to the bug report. They can be used for testing.
---
 sql/field.cc | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/sql/field.cc b/sql/field.cc
index 03d20b4bfe2..f7f7c22bfe9 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -6202,9 +6202,16 @@ Field *Field_string::new_field(MEM_ROOT *root, struct st_table *new_table)
     This is done to ensure that ALTER TABLE will convert old VARCHAR fields
     to now VARCHAR fields.
   */
-  return new Field_varstring(field_length, maybe_null(),
-                             field_name, new_table,
-                             charset());
+  Field *new_field= new Field_varstring(field_length, maybe_null(),
+                                        field_name, new_table,
+                                        charset());
+  /*
+    delayed_insert::get_local_table() needs a ptr copied from old table.
+    This is what other new_field() methods do too. The above method of
+    Field_varstring sets ptr to NULL.
+  */
+  new_field->ptr= ptr;
+  return new_field;
 }
 
 /****************************************************************************