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BUG#16613004 PARTITIONING DDL, CRASH IN FIELD_VARSTRING::CMP_MAX

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Problem :
---------
The specific issue reported in this bug is with range/list column
value that is allocated and initialized by evaluating partition
expression(item tree) during execution. After evaluation the range
list value is marked fixed [part_column_list_val]. During next
execution, we don't re-evaluate the expression and use the old value
since it is marked fixed.

Solution :
----------
One way to solve the issue is to mark all column values as not fixed
during clone so that the expression is always re-evaluated once we
attempt partition_info::fix_column_value_functions() after cloning
the part_info object during execution of DDL on partitioned table.

Reviewed-by: Jimmy Yang <Jimmy.Yang@oracle.com>
Reviewed-by: Mattias Jonsson <mattias.jonsson@oracle.com>

RB: 9424
This commit is contained in:
Debarun Banerjee
2015-07-08 10:00:53 +05:30
parent 2ac01ca660
commit 359f102ad1
4 changed files with 27 additions and 7 deletions
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4
sql/sql_partition.cc
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@@ -1,4 +1,4 @@
/* Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
/* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -4718,7 +4718,7 @@ uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
thd->work_part_info= thd->lex->part_info;
if (thd->work_part_info &&
!(thd->work_part_info= thd->lex->part_info->get_clone()))
!(thd->work_part_info= thd->lex->part_info->get_clone(true)))
DBUG_RETURN(TRUE);
/* ALTER_ADMIN_PARTITION is handled in mysql_admin_table */