MDEV-8496: gtid_ignore_duplicates treats gtid_seq_no as 32-bit

--gtid-ignore-duplicates was comparing sequence numbers as 32-bit, so
after 2**32 transactions things would start to fail.

mysql-test/suite/multi_source/gtid_ignore_duplicates.result

@@ -381,6 +381,39 @@ a
 50
 SET GLOBAL slave_exec_mode=@old_slave_mode;
 SET GLOBAL gtid_strict_mode=@old_strict;
+*** MDEV-8496: gtid_ignore_duplicates treats gtid_seq_no as 32-bit ***
+SET @old_domain= @@SESSION.gtid_domain_id;
+SET SESSION gtid_domain_id=102;
+SET SESSION gtid_seq_no=4294967294;
+INSERT INTO t1 VALUES (60);
+INSERT INTO t1 VALUES (61);
+INSERT INTO t1 VALUES (62);
+SET SESSION gtid_domain_id= @old_domain;
+include/save_master_gtid.inc
+include/sync_with_master_gtid.inc
+SELECT * FROM t1 WHERE a >= 60 ORDER BY a;
+a
+60
+61
+62
+SET default_master_connection = "c2b";
+include/sync_with_master_gtid.inc
+SET default_master_connection = "a2b";
+include/sync_with_master_gtid.inc
+SELECT * FROM t1 WHERE a >= 60 ORDER BY a;
+a
+60
+61
+62
+SET default_master_connection = "b2c";
+include/sync_with_master_gtid.inc
+SET default_master_connection = "a2c";
+include/sync_with_master_gtid.inc
+SELECT * FROM t1 WHERE a >= 60 ORDER BY a;
+a
+60
+61
+62
 SET GLOBAL gtid_domain_id=0;
 STOP ALL SLAVES;
 Warnings:

mysql-test/suite/multi_source/gtid_ignore_duplicates.test

@@ -366,6 +366,40 @@ SET GLOBAL slave_exec_mode=@old_slave_mode;
 SET GLOBAL gtid_strict_mode=@old_strict;
 
 
+--echo *** MDEV-8496: gtid_ignore_duplicates treats gtid_seq_no as 32-bit ***
+
+--connection server_1
+SET @old_domain= @@SESSION.gtid_domain_id;
+SET SESSION gtid_domain_id=102;
+SET SESSION gtid_seq_no=4294967294;
+INSERT INTO t1 VALUES (60);
+INSERT INTO t1 VALUES (61);
+INSERT INTO t1 VALUES (62);
+# The bug was an overflow, the seq_no value 4294967296 (2**32) was treated
+# as 0, causing the last transaction to be ignored.
+SET SESSION gtid_domain_id= @old_domain;
+--source include/save_master_gtid.inc
+
+--connection server_4
+--source include/sync_with_master_gtid.inc
+SELECT * FROM t1 WHERE a >= 60 ORDER BY a;
+
+--connection server_2
+SET default_master_connection = "c2b";
+--source include/sync_with_master_gtid.inc
+SET default_master_connection = "a2b";
+--source include/sync_with_master_gtid.inc
+SELECT * FROM t1 WHERE a >= 60 ORDER BY a;
+
+--connection server_3
+SET default_master_connection = "b2c";
+--source include/sync_with_master_gtid.inc
+SET default_master_connection = "a2c";
+--source include/sync_with_master_gtid.inc
+SELECT * FROM t1 WHERE a >= 60 ORDER BY a;
+
+
+
 # Clean up.
 --connection server_1
 SET GLOBAL gtid_domain_id=0;

sql/rpl_gtid.cc

@@ -117,7 +117,7 @@ int
 rpl_slave_state::check_duplicate_gtid(rpl_gtid *gtid, rpl_group_info *rgi)
 {
   uint32 domain_id= gtid->domain_id;
-  uint32 seq_no= gtid->seq_no;
+  uint64 seq_no= gtid->seq_no;
   rpl_slave_state::element *elem;
   int res;
   bool did_enter_cond= false;