# TestMaxDeltaSchemaCount
set @@global.tidb_max_delta_schema_count= -1;
show warnings;
select @@global.tidb_max_delta_schema_count;
set @@global.tidb_max_delta_schema_count= 9223372036854775807;
show warnings;
select @@global.tidb_max_delta_schema_count;
-- error 1232
set @@global.tidb_max_delta_schema_count= invalid_val;
set @@global.tidb_max_delta_schema_count= 2048;
select @@global.tidb_max_delta_schema_count;
set @@global.tidb_max_delta_schema_count= default;