---
name: "Lucy::Search::NOTQuery"
section: "3pm"
platform: "linux"
package: "liblucy-perl"
version: "0.3.3-7+b1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/Lucy::Search::NOTQuery"
---

# Lucy::Search::NOTQuery(3pm)

Invert the result set of another Query.

## NAME

Lucy::Search::NOTQuery - Invert the result set of another Query.

## SYNOPSIS

```
    my $not_bar_query = Lucy::Search::NOTQuery->new(
        negated_query => $bar_query,
    );
    my $foo_and_not_bar_query = Lucy::Search::ANDQuery->new(
        children => [ $foo_query, $not_bar_query ].
    );
    my $hits = $searcher->hits( query => $foo_and_not_bar_query );
    ...
```

## DESCRIPTION

A NOTQuery wraps another Query and matches against its inverse document set.  All matching docs recieve a score of 0.0.

NOTQuery is often used in conjunction with ANDQuery to provide "a AND NOT b" semantics.

## CONSTRUCTORS

### new( *\[labeled params\]* )

```
    my $not_query = Lucy::Search::NOTQuery->new(
        negated_query => $query,
    );
```

- •

  **negated\_query** - The Query whose result set should be inverted.

## METHODS

### *get\_negated\_query()*

Accessor for the object's negated query.

### set\_negated\_query(negated\_query)

Setter for the object's negated query.

## INHERITANCE

Lucy::Search::NOTQuery isa Lucy::Search::PolyQuery isa Lucy::Search::Query isa Lucy::Object::Obj.