Function GetTypeFromCastOrCollate

pkg/sql/parser/parse.go:436–450

GetTypeFromCastOrCollate returns the type of the given tree.Expr. The method assumes that the expression is either tree.CastExpr or tree.CollateExpr (which wraps the tree.CastExpr).

(expr tree.Expr)

// assumes that the expression is either tree.CastExpr or tree.CollateExpr
// (which wraps the tree.CastExpr).
func GetTypeFromCastOrCollate(expr tree.Expr) (tree.ResolvableTypeReference, error) {
	// COLLATE clause has lower precedence than the cast, so if we have
	// something like `1::STRING COLLATE en`, it'll be parsed as
	// CollateExpr(CastExpr).
	if collate, ok := expr.(*tree.CollateExpr); ok {
		return types.MakeCollatedString(types.String, collate.Locale), nil
	}

	cast, ok := expr.(*tree.CastExpr)
	if !ok {
		return nil, errors.AssertionFailedf("expected a tree.CastExpr, but found %T", expr)
	}

	return cast.Type, nil
}

var errVarBitLengthNotPositive = pgerror.WithCandidateCode(
	errors.New("length for type varbit must be at least 1"), pgcode.InvalidParameterValue)