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https://github.com/snetsystems/dsl-builder

This module is what convert from KQL or Lucene language to DSL.
https://github.com/snetsystems/dsl-builder

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This module is what convert from KQL or Lucene language to DSL.

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# OpenSearch Query Builder

A library extracted from OpenSearch Dashboard for Query DSL conversion. This package provides core functionality for OpenSearch/Elasticsearch query builder.

**Version Compatibility:** This library is extracted from OpenSearch-Dashboards version 3.1.0 (as of 2025.7.20) and maintains compatibility with that version's query DSL structure and features.

**Module Support:** This package supports both CommonJS and ES Module imports for maximum compatibility.

## ๐Ÿ“ฆ Installation

```bash
npm install dsl-builder
```

```bash
yarn add dsl-builder
```

## ๐Ÿš€ Key Features

### Query DSL Conversion
- KQL (Kibana Query Language) parsing and conversion
- Filter query creation and management
- OpenSearch/Elasticsearch query DSL generation

### Field Type System
- Support for various field types (string, number, date, geo, etc.)
- Specialized query processing for each field type

### Module Support
- **CommonJS**: `const { buildOpenSearchQuery } = require('dsl-builder');`
- **ES Modules**: `import { buildOpenSearchQuery } from 'dsl-builder';`

## ๐Ÿ“– Usage

### KQL Query Conversion

```typescript
// ES Module import
import { buildOpenSearchQuery } from 'dsl-builder';

// CommonJS import
// const { buildOpenSearchQuery } = require('dsl-builder');

const indexPattern = {
title: 'logs-*',
fields: [
{ name: 'status', type: 'string' },
{ name: 'response_time', type: 'number' },
{ name: '@timestamp', type: 'date' }
]
};

// Convert KQL query to OpenSearch DSL
const dsl = buildOpenSearchQuery(indexPattern, [
{
query: 'status:error AND response_time:>500',
language: 'kuery'
}
]);

console.log(JSON.stringify(dsl, null, 2));
```

## ๐Ÿ”ง API Reference

### buildOpenSearchQuery

Converts query objects to OpenSearch DSL.

```typescript
function buildOpenSearchQuery(
indexPattern: IndexPattern,
queries: Query[],
filters: Filter[] = [],
config: QueryState = {}
): OpenSearchQuery
```

## ๐Ÿ“ Project Structure

```
src/
โ”œโ”€โ”€ index_patterns/ # Index pattern related functionality
โ”‚ โ”œโ”€โ”€ fields/ # Field types and mapping
โ”‚ โ”œโ”€โ”€ index_patterns/ # Index pattern service
โ”‚ โ”œโ”€โ”€ lib/ # Utility library
โ”‚ โ””โ”€โ”€ errors/ # Error handling
โ”œโ”€โ”€ opensearch_query/ # Query DSL conversion
โ”‚ โ”œโ”€โ”€ kuery/ # KQL parser and converter
โ”‚ โ”œโ”€โ”€ filters/ # Filter processing
โ”‚ โ””โ”€โ”€ opensearch_query/ # Main query builder
โ”œโ”€โ”€ query/ # Query types and interfaces
โ”œโ”€โ”€ osd_field_types/ # Field type system
โ””โ”€โ”€ utils/ # Common utilities
```

## ๐Ÿงช Testing

```bash
# Run tests
npm test

# Test watch mode
npm run test:watch
```

## ๐Ÿ“ฆ Build

```bash
# TypeScript compilation
npm run build

# Prepare for deployment
npm run prepare
```

## ๐Ÿค Contributing

This project was extracted from the `src/plugins/data/common/index_patterns` module of OpenSearch Dashboard.

## ๐Ÿ“„ License

This project is licensed under the Apache License 2.0. See the [LICENSE](LICENSE) file for details.

## ๐Ÿ™ Acknowledgments

This library was extracted from the OpenSearch Dashboard project. Thanks to the OpenSearch community.