MDEV-17532 Performance_schema reports wrong directory for the temporary files...

MDEV-17532 Performance_schema reports wrong directory for the temporary files of ALTER TABLE…ALGORITHM=INPLACE

row_merge_file_create_low(): Pass the directory of the temporary file
to the PSI_FILE_CALL.

mysql-test/suite/innodb/r/alter_inplace_perfschema.result

+update performance_schema.setup_instruments set enabled='yes';
+update performance_schema.setup_consumers set enabled='yes';
+CREATE TABLE t1 (a serial, b varchar(255)) ENGINE=InnoDB;
+BEGIN;
+COMMIT;
+SET DEBUG_SYNC = 'row_log_apply_before SIGNAL go WAIT_FOR gone';
+ALTER TABLE t1 ADD INDEX(b), ALGORITHM=INPLACE;
+SET DEBUG_SYNC = 'now WAIT_FOR go';
+SELECT DISTINCT object_name FROM performance_schema.events_waits_history_long
+WHERE event_name LIKE '%wait%io%file%innodb%innodb_temp_file%';
+object_name
+tmp/Innodb Merge Temp File
+SET DEBUG_SYNC = 'now SIGNAL gone';
+SET DEBUG_SYNC = 'RESET';
+DROP TABLE t1;

mysql-test/suite/innodb/t/alter_inplace_perfschema.opt

+--innodb-sort-buffer-size=64k
+--tmpdir=$MYSQLTEST_VARDIR/tmp

mysql-test/suite/innodb/t/alter_inplace_perfschema.test

+--source include/have_innodb.inc
+--source include/have_perfschema.inc
+--source include/have_debug.inc
+--source include/have_debug_sync.inc
+--source include/not_embedded.inc
+
+connect (ddl, localhost, root,,);
+update performance_schema.setup_instruments set enabled='yes';
+update performance_schema.setup_consumers set enabled='yes';
+CREATE TABLE t1 (a serial, b varchar(255)) ENGINE=InnoDB;
+
+BEGIN;
+let $n=10;
+--disable_query_log
+while ($n) {
+dec $n;
+INSERT INTO t1 SELECT NULL, REPEAT('b',255);
+}
+--enable_query_log
+COMMIT;
+
+SET DEBUG_SYNC = 'row_log_apply_before SIGNAL go WAIT_FOR gone';
+send ALTER TABLE t1 ADD INDEX(b), ALGORITHM=INPLACE;
+
+connection default;
+SET DEBUG_SYNC = 'now WAIT_FOR go';
+--replace_regex /.*[\\\/]tmp/tmp/
+SELECT DISTINCT object_name FROM performance_schema.events_waits_history_long
+WHERE event_name LIKE '%wait%io%file%innodb%innodb_temp_file%';
+
+#--exec lsof -p `pidof mysqld`
+SET DEBUG_SYNC = 'now SIGNAL gone';
+
+connection ddl;
+reap;
+disconnect ddl;
+
+connection default;
+SET DEBUG_SYNC = 'RESET';
+DROP TABLE t1;

storage/innobase/row/row0merge.cc

@@ -3139,9 +3139,17 @@ row_merge_file_create_low(
 	performance schema */
 	struct PSI_file_locker*	locker = NULL;
 	PSI_file_locker_state	state;
+	if (!path) {
+		path = mysql_tmpdir;
+	}
+	static const char label[] = "/Innodb Merge Temp File";
+	char* name = static_cast<char*>(
+		ut_malloc(strlen(path) + sizeof label));
+	strcpy(name, path);
+	strcat(name, label);
 	locker = PSI_FILE_CALL(get_thread_file_name_locker)(
 			       &state, innodb_file_temp_key, PSI_FILE_OPEN,
-			       "Innodb Merge Temp File", &locker);
+			       path ? name : label, &locker);
 	if (locker != NULL) {
 		PSI_FILE_CALL(start_file_open_wait)(locker,
 						    __FILE__,
@@ -3154,6 +3162,7 @@ row_merge_file_create_low(
 		PSI_FILE_CALL(end_file_open_wait_and_bind_to_descriptor)(
 			      locker, fd);
 	}
+	ut_free(name);
 #endif
 
 	if (fd < 0) {

storage/xtradb/row/row0merge.cc

@@ -3143,9 +3143,17 @@ row_merge_file_create_low(
 	performance schema */
 	struct PSI_file_locker*	locker = NULL;
 	PSI_file_locker_state	state;
+	if (!path) {
+		path = mysql_tmpdir;
+	}
+	static const char label[] = "/Innodb Merge Temp File";
+	char* name = static_cast<char*>(
+		ut_malloc(strlen(path) + sizeof label));
+	strcpy(name, path);
+	strcat(name, label);
 	locker = PSI_FILE_CALL(get_thread_file_name_locker)(
 			       &state, innodb_file_temp_key, PSI_FILE_OPEN,
-			       "Innodb Merge Temp File", &locker);
+			       path ? name : label, &locker);
 	if (locker != NULL) {
 		PSI_FILE_CALL(start_file_open_wait)(locker,
 						    __FILE__,
@@ -3158,6 +3166,7 @@ row_merge_file_create_low(
 		PSI_FILE_CALL(end_file_open_wait_and_bind_to_descriptor)(
 			      locker, fd);
 	}
+	ut_free(name);
 #endif
 
 	if (fd < 0) {