func NewVectorAggregation(aggrTypeStr string, vector ast.Node, groupBy []model.LabelName) (*ast.VectorAggregation, error) {
if vector.Type() != ast.VECTOR {
return nil, fmt.Errorf("Operand of %v aggregation must be of vector type", aggrTypeStr)
}
var aggrTypes = map[string]ast.AggrType{
"SUM": ast.SUM,
"MAX": ast.MAX,
"MIN": ast.MIN,
"AVG": ast.AVG,
}
aggrType, ok := aggrTypes[aggrTypeStr]
if !ok {
return nil, fmt.Errorf("Unknown aggregation type '%v'", aggrTypeStr)
}
return ast.NewVectorAggregation(aggrType, vector.(ast.VectorNode), groupBy), nil
}
func CreateRule(name string, labels model.LabelSet, root ast.Node, permanent bool) (*Rule, error) {
if root.Type() != ast.VECTOR {
return nil, fmt.Errorf("Rule %v does not evaluate to vector type", name)
}
return NewRule(name, labels, root.(ast.VectorNode), permanent), nil
}