-20235 THE COLUMN `column-name` CANNOT BE ADDED OR ALTERED BECAUSE `table-name` IS A MATERIALIZED QUERY TABLE

Explanation
 The alter table
statement attempted to add or alter column column-name of
materialized query table table-name. This is not
allowed.

System action
 The statement cannot be processed.

Programmer response
 Columns of materialized
query tables cannot be added or altered. Alter the materialized query
table to become a regular table before adding or altering a column.

SQLSTATE
 428FY

-20235 THE COLUMN column-name CANNOT BE ADDED OR ALTERED BECAUSE table-name IS A MATERIALIZED QUERY TABLE

Explanation

System action

Programmer response

SQLSTATE

-20235 THE COLUMN `column-name` CANNOT BE ADDED OR ALTERED BECAUSE `table-name` IS A MATERIALIZED QUERY TABLE