position_increment_gap
editposition_increment_gap
editAnalyzed text fields take term positions
into account, in order to be able to support
proximity or phrase queries.
When indexing text fields with multiple values a "fake" gap is added between
the values to prevent most phrase queries from matching across the values. The
size of this gap is configured using position_increment_gap
and defaults to
100
.
For example:
resp = client.index( index="my-index-000001", id="1", document={ "names": [ "John Abraham", "Lincoln Smith" ] }, ) print(resp) resp1 = client.search( index="my-index-000001", query={ "match_phrase": { "names": { "query": "Abraham Lincoln" } } }, ) print(resp1) resp2 = client.search( index="my-index-000001", query={ "match_phrase": { "names": { "query": "Abraham Lincoln", "slop": 101 } } }, ) print(resp2)
response = client.index( index: 'my-index-000001', id: 1, body: { names: [ 'John Abraham', 'Lincoln Smith' ] } ) puts response response = client.search( index: 'my-index-000001', body: { query: { match_phrase: { names: { query: 'Abraham Lincoln' } } } } ) puts response response = client.search( index: 'my-index-000001', body: { query: { match_phrase: { names: { query: 'Abraham Lincoln', slop: 101 } } } } ) puts response
const response = await client.index({ index: "my-index-000001", id: 1, document: { names: ["John Abraham", "Lincoln Smith"], }, }); console.log(response); const response1 = await client.search({ index: "my-index-000001", query: { match_phrase: { names: { query: "Abraham Lincoln", }, }, }, }); console.log(response1); const response2 = await client.search({ index: "my-index-000001", query: { match_phrase: { names: { query: "Abraham Lincoln", slop: 101, }, }, }, }); console.log(response2);
PUT my-index-000001/_doc/1 { "names": [ "John Abraham", "Lincoln Smith"] } GET my-index-000001/_search { "query": { "match_phrase": { "names": { "query": "Abraham Lincoln" } } } } GET my-index-000001/_search { "query": { "match_phrase": { "names": { "query": "Abraham Lincoln", "slop": 101 } } } }
This phrase query doesn’t match our document which is totally expected. |
|
This phrase query matches our document, even though |
The position_increment_gap
can be specified in the mapping. For instance:
resp = client.indices.create( index="my-index-000001", mappings={ "properties": { "names": { "type": "text", "position_increment_gap": 0 } } }, ) print(resp) resp1 = client.index( index="my-index-000001", id="1", document={ "names": [ "John Abraham", "Lincoln Smith" ] }, ) print(resp1) resp2 = client.search( index="my-index-000001", query={ "match_phrase": { "names": "Abraham Lincoln" } }, ) print(resp2)
response = client.indices.create( index: 'my-index-000001', body: { mappings: { properties: { names: { type: 'text', position_increment_gap: 0 } } } } ) puts response response = client.index( index: 'my-index-000001', id: 1, body: { names: [ 'John Abraham', 'Lincoln Smith' ] } ) puts response response = client.search( index: 'my-index-000001', body: { query: { match_phrase: { names: 'Abraham Lincoln' } } } ) puts response
const response = await client.indices.create({ index: "my-index-000001", mappings: { properties: { names: { type: "text", position_increment_gap: 0, }, }, }, }); console.log(response); const response1 = await client.index({ index: "my-index-000001", id: 1, document: { names: ["John Abraham", "Lincoln Smith"], }, }); console.log(response1); const response2 = await client.search({ index: "my-index-000001", query: { match_phrase: { names: "Abraham Lincoln", }, }, }); console.log(response2);