Function AsDTuple

pkg/sql/sem/tree/datum.go:2912–2920

AsDTuple attempts to retrieve a *DTuple from an Expr, returning a *DTuple and a flag signifying whether the assertion was successful. The function should be used instead of direct type assertions wherever a *DTuple wrapped by a *DOidWrapper is possible.

(e Expr)

// be used instead of direct type assertions wherever a *DTuple wrapped by a
// *DOidWrapper is possible.
func AsDTuple(e Expr) (*DTuple, bool) {
	switch t := e.(type) {
	case *DTuple:
		return t, true
	case *DOidWrapper:
		return AsDTuple(t.Wrapped)
	}
	return nil, false
}

// maybePopulateType populates the tuple's type if it hasn't yet been
// populated.