drop_constraint

drop_constraint(constraint_name: str, table_name: str, type_: Optional[str] = None, schema: Optional[str] = None) → Optional[Table]

Drop a constraint of the given name, typically via DROP CONSTRAINT.

Parameters:

• constraint_name – name of the constraint.
• table_name – table name.
• type_ – optional, required on MySQL. can be ‘foreignkey’, ‘primary’, ‘unique’, or ‘check’.
• schema – Optional schema name to operate within. To control quoting of the schema outside of the default behavior, use the SQLAlchemy construct quoted_name.