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MDEV-4465: Reproducible crash (mysqld got signal 11) in multi_delete::initialize_tables...

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- make multi_delete::initialize_tables() take into account that the JOIN structure may have
  semi-join nests (which are not fully initialized when this function is called, they have 
  tab->table=NULL which caused the crash)
- Also checked multi_update::initialize_tables(): it has a different logic and needed no fixing.
This commit is contained in:
Sergey Petrunya
2013-05-03 00:10:43 +04:00
parent 8d75f11a67
commit 6ed00c4d8a
4 changed files with 48 additions and 1 deletions
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2
sql/sql_delete.cc
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@ -677,7 +677,7 @@ multi_delete::initialize_tables(JOIN *join)
tab;
tab= next_linear_tab(join, tab, WITHOUT_BUSH_ROOTS))
{
if (tab->table->map & tables_to_delete_from)
if (!tab->bush_children && tab->table->map & tables_to_delete_from)
{
/* We are going to delete from this table */
TABLE *tbl=walk->table=tab->table;