modificaciones MySQL tipo INT empalme instrucción SQL bigint

SELECT
CONCAT (
"mesa alter",
TABLE_SCHEMA,
" "
TABLE_NAME,
" modificar",
COLUMN_NAME,
"bigint (20)",
IF
(= IS_NULLABLE 'no', "NOT NULL", ""),
SI
(= EXTRA "", "", "AUTO_INCREMENT"),
SI
(COLUMN_DEFAULT IS NULL, "", CONCAT ( "DEFAULT", COLUMN_DEFAULT)),
SI
(COLUMN_COMMENT = "", "", CONCAT ( "comentario '", COLUMN_COMMENT, " '")),
";"
) AS alter_sql
DE
INFORMATION_SCHEMA.COLUMNS
DONDE
(COLUMN_NAME ='idpedido' OR COLUMN_NAME = 'order_id')
Y DATA_TYPE = 'int';