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1)
connect (con1,localhost,root,,);
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let $id=`select connection_id()`;
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connection default;
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--eval prepare stmt from "kill query (select $id)";
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execute stmt;
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execute stmt;
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5.5 821a6939087d411f97256d00f
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Version: '5.5.69-MariaDB-debug'
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mysqld: /d1/git/5.5/sql/sql_union.cc:1018: bool st_select_lex::cleanup(): Assertion `(st_select_lex*)join->select_lex == this' failed.
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200807 8:38:07 [ERROR] mysqld got signal 6 ;
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linux/raise.c:51(__GI_raise)[0x7f3294e1b7bb]
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stdlib/abort.c:81(__GI_abort)[0x7f3294e06535]
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intl/loadmsgcat.c:1177(_nl_load_domain)[0x7f3294e0640f]
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sql/sql_union.cc:1019(st_select_lex::cleanup())[0x55fe1e21f8b6]
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sql/item_subselect.cc:3085(subselect_single_select_engine::prepare(THD*))[0x55fe1e3b38fe]
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sql/item_subselect.cc:249(Item_subselect::fix_fields(THD*, Item**))[0x55fe1e3abc1f]
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sql/sql_parse.cc:3761(mysql_execute_command(THD*))[0x55fe1e16fb34]
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sql/sql_prepare.cc:3942(Prepared_statement::execute(String*, bool))[0x55fe1e18d2c3]
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sql/sql_prepare.cc:3600(Prepared_statement::execute_loop(String*, bool, unsigned char*, unsigned char*))[0x55fe1e18c38c]
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sql/sql_prepare.cc:2751(mysql_sql_stmt_execute(THD*))[0x55fe1e18a4c6]
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sql/sql_parse.cc:2232(mysql_execute_command(THD*))[0x55fe1e16b73d]
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sql/sql_parse.cc:5928(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x55fe1e17538f]
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sql/sql_parse.cc:1069(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x55fe1e168cb2]
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sql/sql_parse.cc:793(do_command(THD*))[0x55fe1e167ec7]
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sql/sql_connect.cc:1268(do_handle_one_connection(THD*))[0x55fe1e26cb2b]
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sql/sql_connect.cc:1185(handle_one_connection)[0x55fe1e26c8a4]
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perfschema/pfs.cc:1017(pfs_spawn_thread)[0x55fe1e5ed171]
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nptl/pthread_create.c:487(start_thread)[0x7f32957f0fa3]
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x86_64/clone.S:97(clone)[0x7f3294edd4cf]
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Query (0x7f328e787110): kill query (select 3)
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2) Another case while using values():
connect (con1,localhost,root,,);
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let $id=`select connection_id()`;
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connection default;
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--eval prepare stmt from "kill query (values ($id))";
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execute stmt;
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execute stmt;
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connect con1,localhost,root,,;
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connection default;
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prepare stmt from "kill query (values (5))";;
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execute stmt;
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execute stmt;
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main.1_my [ fail ]
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Test ended at 2020-08-07 10:45:17
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CURRENT_TEST: main.1_my
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mysqltest: At line 9: query 'execute stmt' failed: 1970: KILL does not support subqueries or stored functions
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First execucion was processed, but the second fails.
3)
MariaDB [test]> prepare stmt from "kill query ( (select 9) order by `9` limit 1 )";
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Query OK, 0 rows affected (0.001 sec)
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Statement prepared
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MariaDB [test]> execute stmt;
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Query OK, 0 rows affected (0.001 sec)
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MariaDB [test]> execute stmt;
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ERROR 1054 (42S22): Unknown column '???' in 'order clause'
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First execucion was processed, but on the second `9` is not a name of column?
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