def canonicalize_alter_from_external_ref(
self,
schema: s_schema.Schema,
context: sd.CommandContext,
) -> None:
if (
not self.get_attribute_value('abstract')
and (subjectexpr :=
self.get_attribute_value('subjectexpr')) is not None
):
# To compute the new name, we construct an AST of the
# constraint, since that is the infrastructure we have for
# computing the classname.
name = sn.shortname_from_fullname(self.classname)
assert isinstance(name, sn.QualName), "expected qualified name"
ast = qlast.CreateConcreteConstraint(
name=qlast.ObjectRef(name=name.name, module=name.module),
subjectexpr=subjectexpr.qlast,
args=[],
)
quals = sn.quals_from_fullname(self.classname)
new_name = self._classname_from_ast_and_referrer(
schema, sn.QualName.from_string(quals[0]), ast, context)
if new_name == self.classname:
return
rename = self.scls.init_delta_command(
schema, sd.RenameObject, new_name=new_name)
rename.set_attribute_value(
'name', value=new_name, orig_value=self.classname)
self.add(rename)
def reduce_CreateConstraint(self, *kids):
r"""%reduce CONSTRAINT \
NodeName OptConcreteConstraintArgList OptOnExpr"""
self.val = qlast.CreateConcreteConstraint(
name=kids[1].val,
args=kids[2].val,
subjectexpr=kids[3].val,
)
def reduce_CreateDelegatedConstraint(self, *kids):
r"""%reduce DELEGATED CONSTRAINT \
NodeName OptConcreteConstraintArgList OptOnExpr"""
self.val = qlast.CreateConcreteConstraint(
delegated=True,
name=kids[2].val,
args=kids[3].val,
subjectexpr=kids[4].val,
)
def reduce_CreateConstraint(self, *kids):
r"""%reduce CREATE OptDelegated CONSTRAINT \
NodeName OptConcreteConstraintArgList OptOnExpr \
OptCreateCommandsBlock"""
self.val = qlast.CreateConcreteConstraint(
is_abstract=kids[1].val,
name=kids[3].val,
args=kids[4].val,
subjectexpr=kids[5].val,
commands=kids[6].val,
)
def reduce_CreateDelegatedConstraint(self, *kids):
r"""%reduce DELEGATED CONSTRAINT \
NodeName OptConcreteConstraintArgList OptOnExpr \
CreateSDLCommandsBlock"""
self.val = qlast.CreateConcreteConstraint(
is_abstract=True,
name=kids[2].val,
args=kids[3].val,
subjectexpr=kids[4].val,
commands=kids[5].val,
)
