https://github.com/zhuliquan/lucene-to-dsl

parse lucene query and convert lucene query to ElasticSearch DSL
https://github.com/zhuliquan/lucene-to-dsl

elasticsearch-dsl lucene query

Last synced: about 2 months ago
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parse lucene query and convert lucene query to ElasticSearch DSL

• Host: GitHub
• URL: https://github.com/zhuliquan/lucene-to-dsl
• Owner: zhuliquan
• Created: 2021-11-18T16:29:54.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2024-01-14T12:32:14.000Z (12 months ago)
• Last Synced: 2024-06-21T10:59:18.043Z (7 months ago)
• Topics: elasticsearch-dsl, lucene, query
• Language: Go
• Homepage:
• Size: 797 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# lucene-to-dsl

## Introduction

This package can parse lucene query and convert to dsl used by ES (ElasticSearch), this package is pure go package.

## Features

- 1、This package can convert lucene query to dsl which is used by ES.

- 2、This package can compact many leaf nodes to fewer leaf nodes (i.g. `x:>1 AND x:<10` => `{"range": {"x": {"gt": 1, "lt": 10}}}` instead of `{"bool": {"must": [{"range": {"x": {"gt": 1}}}, {"range": {"x": {"lt": 10}}}]}}`). compact dsl will be serached more faster than uncompact dsl. for example two range dsl compact to single range dsl, which can reduce a range query and two bitsect intersect.

- 3、This package can filter some wrong lucene query (i.g. `x:>1 AND x:<-1` is wrong lucene query).

- 4、This package can process wildcard field (i.g. `_exist_:fo\?bar\*`, `foo\?bar\*:bar`)

## Limitations

- 1、only support lucene query with **field name**, instead of query without **field name** (i.e. this project can't parse query like `foo OR bar`, `foo AND bar`).

- 2、don't support prefix operator `'+'` / `'-'`, for instance `+fo0 -bar`.

- 3、should give [index mapping of field](https://www.elastic.co/guide/en/elasticsearch/reference/7.15/mapping.html).

- 4、 will ignore `boost` parameter in field mapping which using in index time boosting.

- 5、 don't support alias field type (a kind of filed mapping type).

### mapping of field

In order to convert more accurately, you need the configuration of a given field, such as mapping of field.