MDEV-4911 - add KILL query id, and add query id information to processlist

- issue proper error message if query id is not found
- do not allow kill query id 0
- fixed ps-protocol and embedded tests

mysql-test/r/kill.result

@@ -306,5 +306,7 @@ SELECT SLEEP(1000);
 KILL QUERY ID @id;
 SLEEP(1000)
 1
+KILL QUERY ID 0;
+ERROR HY000: Unknown query id: 0
 SET DEBUG_SYNC = 'RESET';
 DROP FUNCTION MY_KILL;

mysql-test/suite/funcs_1/r/is_columns_is_embedded.result

@@ -242,6 +242,7 @@ def	information_schema	PROCESSLIST	INFO	8	NULL	YES	longtext	4294967295	429496729
 def	information_schema	PROCESSLIST	MAX_STAGE	11	0	NO	tinyint	NULL	NULL	3	0	NULL	NULL	NULL	tinyint(2)				
 def	information_schema	PROCESSLIST	MEMORY_USED	13	0	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(7)				
 def	information_schema	PROCESSLIST	PROGRESS	12	0.000	NO	decimal	NULL	NULL	7	3	NULL	NULL	NULL	decimal(7,3)				
+def	information_schema	PROCESSLIST	QUERY_ID	15	0	NO	bigint	NULL	NULL	19	0	NULL	NULL	NULL	bigint(4)				
 def	information_schema	PROCESSLIST	STAGE	10	0	NO	tinyint	NULL	NULL	3	0	NULL	NULL	NULL	tinyint(2)				
 def	information_schema	PROCESSLIST	STATE	7	NULL	YES	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(64)				
 def	information_schema	PROCESSLIST	TIME	6	0	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(7)				
@@ -734,6 +735,7 @@ NULL	information_schema	PROCESSLIST	MAX_STAGE	tinyint	NULL	NULL	NULL	NULL	tinyin
 NULL	information_schema	PROCESSLIST	PROGRESS	decimal	NULL	NULL	NULL	NULL	decimal(7,3)
 NULL	information_schema	PROCESSLIST	MEMORY_USED	int	NULL	NULL	NULL	NULL	int(7)
 NULL	information_schema	PROCESSLIST	EXAMINED_ROWS	int	NULL	NULL	NULL	NULL	int(7)
+NULL	information_schema	PROCESSLIST	QUERY_ID	bigint	NULL	NULL	NULL	NULL	bigint(4)
 3.0000	information_schema	REFERENTIAL_CONSTRAINTS	CONSTRAINT_CATALOG	varchar	512	1536	utf8	utf8_general_ci	varchar(512)
 3.0000	information_schema	REFERENTIAL_CONSTRAINTS	CONSTRAINT_SCHEMA	varchar	64	192	utf8	utf8_general_ci	varchar(64)
 3.0000	information_schema	REFERENTIAL_CONSTRAINTS	CONSTRAINT_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(64)

mysql-test/t/kill.test

@@ -644,5 +644,8 @@ KILL QUERY ID @id;
 connection default;
 reap;
 
+--error ER_NO_SUCH_QUERY
+KILL QUERY ID 0;
+
 SET DEBUG_SYNC = 'RESET';
 DROP FUNCTION MY_KILL;

sql/share/errmsg-utf8.txt

@@ -6559,3 +6559,7 @@ ER_GTID_POSITION_NOT_FOUND_IN_BINLOG2
 	eng "Connecting slave requested to start from GTID %u-%u-%llu, which is not in the master's binlog. Since the master's binlog contains GTIDs with higher sequence numbers, it probably means that the slave has diverged due to executing extra errorneous transactions"
 ER_BINLOG_MUST_BE_EMPTY
 	eng "This operation is not allowed if any GTID has been logged to the binary log. Run RESET MASTER first to erase the log"
+ER_NO_SUCH_QUERY
+        eng "Unknown query id: %lld"
+        ger "Unbekannte Abfrage-ID: %lld"
+        rus "Неизвестный номер запроса: %lld"

sql/sql_parse.cc

@@ -6854,11 +6854,11 @@ uint
 kill_one_thread(THD *thd, longlong id, killed_state kill_signal, killed_type type)
 {
   THD *tmp;
-  uint error=ER_NO_SUCH_THREAD;
+  uint error= (type == KILL_TYPE_QUERY ? ER_NO_SUCH_QUERY : ER_NO_SUCH_THREAD);
   DBUG_ENTER("kill_one_thread");
   DBUG_PRINT("enter", ("id: %lld  signal: %u", id, (uint) kill_signal));
 
-  if ((tmp= find_thread_by_id(id, type == KILL_TYPE_QUERY)))
+  if (id && (tmp= find_thread_by_id(id, type == KILL_TYPE_QUERY)))
   {
     /*
       If we're SUPER, we can KILL anything, including system-threads.