default:
		r := int64(*v.Int)
		if r < 0 {
			return -1, errBadLimitSpecified
		}
		return r, nil
	}
}

// EvalFrom evaluates the From clause on the input record. It only
// applies to JSON input data format (currently).
func (e *SelectStatement) EvalFrom(format string, input Record) ([]*Record, error) {
	if !e.selectAST.From.HasKeypath() {
		return []*Record{&input}, nil
	}
	_, rawVal := input.Raw()

			if err = writer.Finish(s3Select.getProgress()); err != nil {
				// FIXME: log this error.
				err = nil
			}
			break
		}

		var inputRecords []*sql.Record
		if inputRecords, err = s3Select.statement.EvalFrom(s3Select.Input.format, rec); err != nil {
			break
		}

		for _, inputRecord := range inputRecords {
			if s3Select.statement.IsAggregated() {