dgraph-io/dgraph · error

Wrong type encountered for fun ceil

Error message

Wrong type %v encountered for fun ceil

What it means

The `ceil` unary function rounds a numeric value up; it supports INT, FLOAT, and BIGFLOAT inputs. Non-numeric operand types hit the DEFAULT branch, which returns this error (note the message typo "fun ceil" in this version) with the offending type ID.

Solutions

1. Ensure the operand is an int/float typed predicate or numeric variable
2. Check and fix the predicate's schema type
3. Convert the value to a number first (e.g. since() for durations) then ceil
4. Sanity-test with a numeric literal to isolate the bad operand

Example fix

// before
"math ceil(priceAsString)"
// after
"math ceil(price)"

if (!['int','float'].includes(schemaOf('price'))) throw new Error('ceil needs numeric predicate');

function isCeilable(v) { return typeof v === 'number'; }

try {
  r = await txn.query(q);
} catch (e) {
  if (String(e).includes('ceil')) throw new Error('ceil operand must be numeric: ' + e);
  throw e;
}

When it happens

Trigger: math ceil(x) where x is a string, bool, dateTime, or DEFAULT-typed value rather than a numeric predicate/variable.

Common situations: Ceiling a string facet value; applying ceil to a datetime predicate; schema changed so the predicate no longer returns floats.

Related errors

• Wrong type encountered for func exp
• Wrong type encountered for func floor
• Wrong type encountered for func ln
• Wrong type encountered for func sqrt
• Wrong type encountered for func u

AI-assisted analysis of dgraph-io/dgraph@759e242be6 (2026-09-01). Data as JSON: /api/errors/dd343edc3086fc67. Report an issue: GitHub.

Appendix: source

Thrown at query/aggregator.go:561

	return nil
}

func applyCeil(a, res *types.Val) error {
	vBase := getValType(a)
	switch vBase {
	case INT:
		res.Value = a.Value.(int64)

	case FLOAT:
		res.Value = math.Ceil(a.Value.(float64))

	case BIGFLOAT:
		value := a.Value.(big.Float)
		f, _ := value.Float64()
		res.Value = *big.NewFloat(math.Ceil(f)).SetPrec(types.BigFloatPrecision)

	case DEFAULT:
		return errors.Errorf("Wrong type %v encountered for fun ceil", a.Tid)
	}
	return nil
}

func applySince(a, res *types.Val) error {
	if a.Tid == types.DateTimeID {
		a.Value = float64(time.Since(a.Value.(time.Time))) / 1000000000.0
		a.Tid = types.FloatID
		*res = *a
		return nil
	}
	return errors.Errorf("Wrong type %v encountered for func since", a.Tid)
}

type unaryFunc func(a, res *types.Val) error
type binaryFunc func(a, b, res *types.Val) error

var unaryFunctions = map[string]unaryFunc{

View on GitHub (pinned to 759e242be6)