CHANGE MASTER TO master_host='127.0.0.1', master_user='root', master_ssl_verify_server_cert=0;
#
# Basic testing of replicate_do_db.
#
SET @save_replicate_do_db = @@GLOBAL.replicate_do_db;
SELECT @save_replicate_do_db;
@save_replicate_do_db

# Scope.
SET @@SESSION.replicate_do_db = "";
ERROR HY000: Variable 'replicate_do_db' is a GLOBAL variable and should be set with SET GLOBAL
SELECT @@SESSION.replicate_do_db;
ERROR HY000: Variable 'replicate_do_db' is a GLOBAL variable
# Incorrect type.
SET @@GLOBAL.replicate_do_db=1;
ERROR 42000: Incorrect argument type to variable 'replicate_do_db'
SET @@GLOBAL.replicate_do_db=1.1;
ERROR 42000: Incorrect argument type to variable 'replicate_do_db'
SET @@GLOBAL.replicate_do_db=1e1;
ERROR 42000: Incorrect argument type to variable 'replicate_do_db'
# Argument size acceptance.
SELECT GROUP_CONCAT(CONCAT("database_name_", seq) SEPARATOR ",")
INTO @name FROM seq_1_to_8;
SELECT LENGTH(@name);
LENGTH(@name)
127
SET @@GLOBAL.replicate_do_db= @name;
SELECT @@GLOBAL.replicate_do_db;
@@GLOBAL.replicate_do_db
database_name_1,database_name_2,database_name_3,database_name_4,database_name_5,database_name_6,database_name_7,database_name_8
SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='replicate_do_db';
VARIABLE_VALUE
database_name_1,database_name_2,database_name_3,database_name_4,database_name_5,database_name_6,database_name_7,database_name_8
Replicate_Do_DB = 'database_name_1,database_name_2,database_name_3,database_name_4,database_name_5,database_name_6,database_name_7,database_name_8'
# Argument syntax.
SET @@GLOBAL.replicate_do_db="db1,,,,,db3";
SELECT @@GLOBAL.replicate_do_db;
@@GLOBAL.replicate_do_db
db1,db3
SELECT * FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='replicate_do_db';
VARIABLE_NAME	VARIABLE_VALUE
REPLICATE_DO_DB	db1,db3
Replicate_Do_DB = 'db1,db3'
SET @@GLOBAL.replicate_do_db="db1,,,db2,,,db3";
SELECT @@GLOBAL.replicate_do_db;
@@GLOBAL.replicate_do_db
db1,db2,db3
SET @@GLOBAL.replicate_do_db="";
SELECT @@GLOBAL.replicate_do_db;
@@GLOBAL.replicate_do_db

SET @@GLOBAL.replicate_do_db=null;
SELECT @@GLOBAL.replicate_do_db;
@@GLOBAL.replicate_do_db

SET @@GLOBAL.replicate_do_db=DEFAULT;
SELECT @@GLOBAL.replicate_do_db;
@@GLOBAL.replicate_do_db

# Cleanup.
SET @@GLOBAL.replicate_do_db = @save_replicate_do_db;
#
# MDEV-35688 UBSAN: SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-offset in my_casedn_utf8mb3
#
show variables like 'replicate_do_db';
Variable_name	Value
replicate_do_db