Merge with 4.0.6

BitKeeper/etc/ignore:
  auto-union
acinclude.m4:
  Auto merged
configure.in:
  Auto merged
heap/hp_delete.c:
  Auto merged
heap/hp_scan.c:
  Auto merged
include/my_base.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
libmysqld/lib_sql.cc:
  Auto merged
myisam/mi_check.c:
  Auto merged
myisam/mi_rnext_same.c:
  Auto merged
myisam/sort.c:
  Auto merged
mysql-test/r/alter_table.result:
  Auto merged
mysql-test/r/distinct.result:
  Auto merged
mysql-test/r/func_math.result:
  Auto merged
mysql-test/r/group_by.result:
  Auto merged
mysql-test/r/innodb.result:
  Auto merged
mysql-test/r/select.result:
  Auto merged
mysql-test/t/group_by.test:
  Auto merged
mysql-test/t/select.test:
  Auto merged
mysys/hash.c:
  Auto merged
sql/field.h:
  Auto merged
sql/field_conv.cc:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/handler.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/log.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/opt_sum.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/set_var.h:
  Auto merged
sql/sql_analyse.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_udf.cc:
  Auto merged
sql/structs.h:
  Auto merged
sql/uniques.cc:
  Auto merged
strings/strto.c:
  Auto merged
vio/vio.c:
  Auto merged
BitKeeper/triggers/post-commit:
  Add changeset to commit messages
sql-bench/crash-me.sh:
  Use version from 4.0
sql-bench/server-cfg.sh:
  Use version from 4.0

1 files changed, 21 insertions, 3 deletions

diff --git a/sql/field_conv.cc b/sql/field_conv.cc
index ab71f324732..409c22d61d4 100644
--- a/sql/field_conv.cc
+++ b/sql/field_conv.cc
@@ -122,8 +122,26 @@ set_field_to_null(Field *field)
 }
 
 
+/*
+  Set field to NULL or TIMESTAMP or to next auto_increment number
+
+  SYNOPSIS
+    set_field_to_null_with_conversions()
+    field		Field to update
+    no_conversion	Set to 1 if we should return 1 if field can't
+			take null values.
+			If set to 0 we will do store the 'default value'
+			if the field is a special field. If not we will
+			give an error.
+
+  RETURN VALUES
+    0		Field could take 0 or an automatic conversion was used
+    1		Field could not take NULL and no conversion was used.
+		If no_conversion was not set, an error message is printed
+*/
+
 bool
-set_field_to_null_with_conversions(Field *field)
+set_field_to_null_with_conversions(Field *field, bool no_conversions)
 {
   if (field->real_maybe_null())
   {
@@ -131,6 +149,8 @@ set_field_to_null_with_conversions(Field *field)
     field->reset();
     return 0;
   }
+  if (no_conversions)
+    return 1;
 
   /*
     Check if this is a special type, which will get a special walue
@@ -156,8 +176,6 @@ set_field_to_null_with_conversions(Field *field)
 }
 
 
-
-
 static void do_skip(Copy_field *copy __attribute__((unused)))
 {
 }