bk commit into 5.0 tree (ingo:1.1973) BUG#13707

[ingo]

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ChangeSet
  1.1973 05/11/07 18:31:48 ingo@stripped +1 -0
  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
    1.289 05/11/07 18:31:43 ingo@stripped +10 -3
    Bug#13707 - Server crash with INSERT DELAYED on MyISAM table
    Initialized 'ptr' for a newly instantiated varstring field.
    This is required by INSERT DELAYED.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	ingo
# Host:	chilla.local
# Root:	/home/mydev/mysql-5.0-bug13707

--- 1.288/sql/field.cc	2005-11-01 02:06:56 +01:00
+++ 1.289/sql/field.cc	2005-11-07 18:31:43 +01:00
@@ -6202,9 +6202,16 @@
     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;
 }
 
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