4
votes
3answers
4k views

Quickly change NULL column to NOT NULL

I have a table with millions of rows and a column that allows NULL values. However no row currently has a NULL value for that column (I can verify this fairly quickly with a query). However when I ...
0
votes
1answer
279 views

H2 SELECT NULLABLE or other equivalent to check a column has NOT NULL constraint or not

I would like to check if a column has a NOT NULL constraint in order to start an automated upgrade of the table definition. However in H2 the SQL SELECT NULLABLE FROM TABLE_NAME doesn't return me the ...