Boolean query

A query that matches documents based on boolean combinations of other queries. The boolean query maps to Lucene BooleanQuery.

Boolean query array parameters

When used within a bool query array, each object can contain:

Parameter	Description	Type	Required	Default
query	Query string object	object	✓
occur	Boolean occurrence type	string		should
boost	Score multiplier for relevance	float		1.0

It is built using one or more boolean clauses, each clause with a typed occurrence. The occurrence types are:

Occur

Occur	Description
filter	The clause (query) must appear in matching documents. However, unlike `must`, the score of the query will be ignored. Each query defined under a `filter` acts as a logical “AND”, returning only documents that match all the specified queries.
must	The clause (query) must appear in matching documents and will contribute to the score. Each query defined under a `must` acts as a logical “AND”, returning only documents that match all the specified queries.
must_not	The clause (query) must not appear in the matching documents. Each query defined under a `must_not` acts as a logical “NOT”, returning only documents that do not match any of the specified queries.
should	The clause (query) should appear in the matching document. Each query defined under a `should` acts as a logical “OR”, returning documents that match any of the specified queries.

Boost

Boost values that are less than 1.0 will give less importance to this query compared to other ones while values that are greater than 1.0 will give more importance to the scores returned by this query.

Examples

Boolean query with occur

{
  "bool": [
    {
      "queryString": {
        "query": "node_type:NODE"
      },
      "occur" : "filter"
    },
    {
      "queryString": {
        "query": "content:LambdaDB"
      },
      "occur" : "should"
    }
  ]
}

This query will return top documents that are both of type NODE and have the highest score value.

Boolean query with boost

The boost value must be greater than zero.

{
  "bool": [
    {
      "queryString": {
        "query": "node_type:NODE"
      },
      "boost": 0.8
    },
    {
      "queryString": {
        "query": "content:LambdaDB"
      },
      "boost": 0.2
    }
  ]
}

The final score of the matched document is calculated as proportional to the boost values.

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Boolean query array parameters

Occur

Boost

Examples

Boolean query with occur

Boolean query with boost

​Boolean query array parameters

​Occur

​Boost

​Examples

​Boolean query with occur

​Boolean query with boost

Boolean query array parameters

Occur

Boost

Examples

Boolean query with occur

Boolean query with boost