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Fixed the bug mdev-13346.

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The bug was caused by a defect of the patch for the bug 11081.
The patch was actually a port of the fix this bug from the mysql
code line. Later a correction of this fix was added to the
mysql code. Here's the comment this correction was provided with:

  Bug#16499751: Opening cursor on SELECT in stored procedure causes segfault
  This is a regression from the fix of bug#14740889.
  The fix started using another set of expressions as the source for
  the temporary table used for the materialized cursor. However,
  JOIN::make_tmp_tables_info() calls setup_copy_fields() which creates
  an Item_copy wrapper object on top of the function being selected.
  The Item_copy objects were not properly handled by create_tmp_table -
  they were simply ignored. This patch creates temporary table fields
  based on the underlying item of the Item_copy objects.

The test case for the bug 13346 was taken from mdev-13380.
This commit is contained in:
Igor Babaev
2017-08-15 15:37:10 -07:00
parent c354cb66b0
commit a28152aafc
3 changed files with 45 additions and 1 deletions
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7
sql/sql_select.cc
View File

@ -16572,7 +16572,12 @@ create_tmp_table(THD *thd, TMP_TABLE_PARAM *param, List<Item> &fields,
Field **tmp_from_field=from_field;
while ((item=li++))
{
Item::Type type=item->type();
Item::Type type= item->type();
if (type == Item::COPY_STR_ITEM)
{
item= ((Item_copy *)item)->get_item();
type= item->type();
}
if (not_all_columns)
{
if (item->with_sum_func && type != Item::SUM_FUNC_ITEM)