ALTER [IGNORE] TABLE tbl_name alter_spec [, alter_spec …]
alter_specification:
       ADD [COLUMN] create_definition [FIRST | AFTER column_name ]
   or ADD INDEX [index_name] (index_col_name,…)
   or ADD PRIMARY KEY (index_col_name,…)
   or ADD UNIQUE [index_name] (index_col_name,…)
   or ALTER [COLUMN] col_name {SET DEFAULT lite