bk commit into 5.0 tree (svoj:1.2094) BUG#17001

[Sergey Vojtovich]

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5.0 repository of svoj. When svoj does a push these changes will
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ChangeSet
  1.2094 06/04/21 16:24:31 svoj@april.(none) +1 -0
  BUG#17001 - Table and server crash on ALTER TABLE
  
  frm and data files for tables created by earlier (prior to 5.0.3) MySQL
  versions becomes out of sync after certain ALTER TABLE statements:
  - One that changes column default value;
  - One that changes table comment;
  - One that changes table password.
  
  As a result one can expirience either server crash or data corruption/loss.
  
  This fix ensures that running ALTER TABLE on tables created by earlier
  (prior to 5.0.3) MySQL versions recreates data files.

  sql/sql_table.cc
    1.304 06/04/21 16:24:26 svoj@april.(none) +2 -1
    Ensure that running ALTER TABLE on tables created by earlier
    (prior to 5.0.3) MySQL versions recreates data files.

# 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:	svoj
# Host:	april.(none)
# Root:	/home/svoj/devel/mysql/BUG17001/mysql-5.0

--- 1.303/sql/sql_table.cc	2006-03-30 18:14:51 +05:00
+++ 1.304/sql/sql_table.cc	2006-04-21 16:24:26 +05:00
@@ -3665,7 +3665,8 @@
                     ~(ALTER_CHANGE_COLUMN_DEFAULT|ALTER_OPTIONS) ||
                     (create_info->used_fields &
                      ~(HA_CREATE_USED_COMMENT|HA_CREATE_USED_PASSWORD)) ||
-                    table->s->tmp_table);
+                    table->s->tmp_table ||
+                    table->s->mysql_version < 50300);
   create_info->frm_only= !need_copy_table;
 
   /*