35018: sql: support adding a check with ALTER TABLE ADD COLUMN r=lucy-zhang a=lucy-zhang This PR adds support for adding a check constraint to a column in ALTER TABLE ADD COLUMN.

# Activate a check constraint in a separate migration in PostgreSQL. # Adding a check constraint without `NOT VALID` blocks reads and writes in Postgres and # blocks writes in MySQL and MariaDB while ...

Constraints in sql are used to define rules for the table and columns in a database and also make sure that data are accurate and trusted in the database. constraints are responsible for the ...