Hi Alexander!

Can you double check that this same problem doesn't occur with custom aggregate functions? There is a switch involved with cursors and custom aggregate functions here:

/* Only pop cursors when we're done with group aggregate running. */

if (m_chistics.agg_type != GROUP_AGGREGATE ||

(m_chistics.agg_type == GROUP_AGGREGATE && thd->spcont->quit_func))

thd->spcont->pop_all_cursors(thd); // To avoid memory leaks after an error

That may require a different approach.

Vicențiu

On Tue, 26 Jun 2018 at 13:44 Alexander Barkov <bar@mariadb.com> wrote:

Hello Sanja,

Please review a patch for MDEV-16584.

Thanks!
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