Method define_constraint_preamble

lib/sqlalchemy/sql/compiler.py:7492–7500

(
        self, constraint: Constraint, **kw: Any
    )

        return text

    def define_constraint_preamble(
        self, constraint: Constraint, **kw: Any
    ) -> str:
        text = ""
        if constraint.name is not None:
            formatted_name = self.preparer.format_constraint(constraint)
            if formatted_name is not None:
                text += "CONSTRAINT %s " % formatted_name
        return text

    def define_primary_key_body(
        self, constraint: PrimaryKeyConstraint, **kw: Any