alter table failed for global table

[actiontech-bot]

Raised by: @sevenFH

Steps:

1. Make a global table called global_table
2. Following queries will fail with error: ERROR 1064 (HY000): op table not in schema----GLOBAL_TABLE DROP|ADD|CHANGE
   1. alter table global_table drop name; //drop column
   2. alter table global_table add name1 char(10); //add column
   3. alter table global_table change name name char(15); //alter column type
   4. alter table global_table change name name1 varchar(10); //update column name
   5. alter table global_table drop index global_table_inx; //drop index
3. Above queries succeed on sharding table