[MDEV-30824] Fix binlog to use 'String' for setting 'character_set_cl…

…ient'

Commit a923d6f disabled numeric setting
of character_set_* variables with non-default values:

  MariaDB [(none)]> set character_set_client=224;
  ERROR 1115 (42000): Unknown character set: '224'

However the corresponding binlog functionality still write numeric
values for log event, and this will break binlog replay if the value is
not default. Now make the server use 'String' type for
'character_set_client' when generating binlog events

Before:

  /*!\C utf8mb4 *//*!*/;
  SET @@session.character_set_client=224,@@session.collation_connection=224,@@session.collation_server=33/*!*/;

After:

  /*!\C utf8mb4 *//*!*/;
  SET @@session.character_set_client=utf8mb4,@@session.collation_connection=33,@@session.collation_server=8/*!*/;

Note: prior to the previous commit, setting with '224' or '45' or
'utf8mb4' have the same effect, as they all set the parameter to
'utf8mb4'.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the
BSD-new license. I am contributing on behalf of my employer Amazon Web
Services, Inc.

mysql-test/main/mysqlbinlog-innodb.result

@@ -33,7 +33,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 INSERT INTO t1 VALUES (1)
@@ -64,7 +64,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 INSERT INTO t1 VALUES (1)

mysql-test/main/mysqlbinlog.result

@@ -26,7 +26,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 DROP TABLE IF EXISTS `t1`,`t2`,`t3`,`t4`,`t5`,`t03`,`t04` /* generated by server */
@@ -106,7 +106,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 LOAD DATA LOCAL INFILE 'MYSQLTEST_VARDIR/tmp/SQL_LOAD_MB-#-#' INTO TABLE `t1` FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`word`)
@@ -142,7 +142,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 COMMIT
@@ -193,7 +193,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 insert into t1 values ("Alas")
@@ -220,7 +220,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 DROP TABLE IF EXISTS `t1`,`t2`,`t3`,`t4`,`t5`,`t03`,`t04` /* generated by server */
@@ -300,7 +300,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 LOAD DATA LOCAL INFILE 'MYSQLTEST_VARDIR/tmp/SQL_LOAD_MB-#-#' INTO TABLE `t1` FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`word`)
@@ -336,7 +336,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 COMMIT
@@ -387,7 +387,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 insert into t1 values ("Alas")
@@ -496,7 +496,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 CREATE DEFINER=`root`@`localhost` PROCEDURE `p1`()
@@ -548,7 +548,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 create table t1 (a varchar(64) character set utf8)
@@ -728,7 +728,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 create table t1(a int) engine= innodb
@@ -782,7 +782,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 BEGIN
@@ -817,7 +817,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 BEGIN
@@ -859,7 +859,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 BEGIN
@@ -977,7 +977,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 create table test.t1 (id int not null)
@@ -1060,7 +1060,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 create table test.t1 (id int not null)
@@ -1143,7 +1143,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 create table test.t1 (id int not null)
@@ -1226,7 +1226,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 create table test.t1 (id int not null)

mysql-test/main/mysqlbinlog_row_compressed.result

@@ -37,7 +37,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 CREATE TABLE t1 (pk INT PRIMARY KEY, f1 INT, f2 INT, f3 TINYINT, f4 MEDIUMINT, f5 BIGINT, f6 INT, f7 INT, f8 char(1))

mysql-test/main/mysqlbinlog_row_minimal.result

@@ -35,7 +35,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 CREATE TABLE t1 (pk INT PRIMARY KEY, f1 INT, f2 INT, f3 TINYINT, f4 MEDIUMINT, f5 BIGINT, f6 INT, f7 INT, f8 char(1))
@@ -401,7 +401,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 COMMIT

mysql-test/main/mysqlbinlog_stmt_compressed.result

@@ -37,7 +37,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=#/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 CREATE TABLE t1 (pk INT PRIMARY KEY, f1 INT, f2 INT, f3 TINYINT, f4 MEDIUMINT, f5 BIGINT, f6 INT, f7 INT, f8 char(1))

mysql-test/main/user_var-binlog.result

@@ -33,7 +33,7 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.uniq
 SET @@session.sql_mode=1411383296/*!*/;
 SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
 /*!\C latin1 *//*!*/;
-SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
+SET @@session.character_set_client=latin1,@@session.collation_connection=8,@@session.collation_server=#/*!*/;
 SET @@session.lc_time_names=0/*!*/;
 SET @@session.collation_database=DEFAULT/*!*/;
 INSERT INTO t1 VALUES(@`a b`)