ALTER TABLE {{quote_ident .SchemaName}}.{{quote_ident .TableName}}
  DROP CONSTRAINT IF EXISTS {{quote_ident .ConstraintName}};

ALTER TABLE {{quote_ident .SchemaName}}.{{quote_ident .TableName}}
  ADD CONSTRAINT {{quote_ident .ConstraintName}}
  FOREIGN KEY ({{.SourceColumns}})
  REFERENCES {{quote_ident .TargetSchema}}.{{quote_ident .TargetTable}} ({{.TargetColumns}})
  ON DELETE {{.OnDelete}}
  ON UPDATE {{.OnUpdate}}
  DEFERRABLE;