presto-main/src/main/java/io/prestosql/sql/analyzer/FieldId.java/FieldId/FieldId
class FieldId:    public FieldId(RelationId relationId, int fieldIndex)
    {
        this.relationId = requireNonNull(relationId, "relationId is null");

        checkArgument(fieldIndex >= 0, "fieldIndex must be non-negative, got: %s", fieldIndex);
        this.fieldIndex = fieldIndex;
    }