A function to check if a column allows NULL

You can query the INFORMATION_SCHEMA:

http://dev.mysql.com/doc/refman/5.0/en/columns-table.html

In the INFORMATION_SCHEMA.COLUMNS table there is a IS_NULLABLE column.

You could turn it into a function, I imagine, but I would probably put this logic in an outer part.

Cade's answer is correct, but the information directly from the link:

SELECT COLUMN_NAME, DATA_TYPE, IS_NULLABLE, COLUMN_DEFAULT
  FROM INFORMATION_SCHEMA.COLUMNS
  WHERE table_name = 'mytable'

Tags:

Mysql

Null

Functions

Update

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