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MDEV-23836: Assertion `! is_set() || m_can_overwrite_status' in

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Diagnostics_area::set_error_status (interrupted ALTER TABLE under LOCK)

Analysis: KILL_QUERY is not ignored when local memory used exceeds maximum
session memory. Hence the query proceeds, OK is sent and we end up
reopening tables that are marked for reopen. During this, kill status is
eventually checked and assertion failure happens during trying to send error
message because OK has already been sent.
Fix: Ok is already sent so statement has already executed. It is too
late to give error. So ignore kill.
This commit is contained in:
Rucha Deodhar
2020-10-16 20:19:09 +05:30
parent c62bb9c3b4
commit 81e00485c3
4 changed files with 44 additions and 2 deletions
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4
sql/sql_base.cc
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@ -2609,7 +2609,9 @@ void Locked_tables_list::mark_table_for_reopen(THD *thd, TABLE *table)
bool
Locked_tables_list::reopen_tables(THD *thd, bool need_reopen)
{
Open_table_context ot_ctx(thd, MYSQL_OPEN_REOPEN);
bool is_ok= thd->get_stmt_da()->is_ok();
Open_table_context ot_ctx(thd, !is_ok ? MYSQL_OPEN_REOPEN:
MYSQL_OPEN_IGNORE_KILLED | MYSQL_OPEN_REOPEN);
uint reopen_count= 0;
MYSQL_LOCK *lock;
MYSQL_LOCK *merged_lock;