Elasticsearch

import { Client } from '@elastic/elasticsearch';
const client = new Client({ node: 'http://localhost:9200' });

// Index a document await client.index({ index: 'products', id: 'prod-1', document: { name: 'Wireless Keyboard', description: 'Compact mechanical keyboard with RGB lighting', price: 79.99, category: 'electronics', tags: ['keyboard', 'mechanical', 'wireless'], inStock: true, createdAt: new Date(), }, });

// Full-text search const results = await client.search({ index: 'products', body: { query: { bool: { must: [ { multi_match: { query: 'wireless keyboard', fields: ['name^3', 'description', 'tags'], // boost name fuzziness: 'AUTO' }} ], filter: [ { term: { inStock: true } }, { range: { price: { gte: 20, lte: 200 } } } ] } }, aggs: { by_category: { terms: { field: 'category.keyword', size: 10 } }, price_ranges: { range: { field: 'price', ranges: [{to: 50}, {from: 50, to: 100}, {from: 100}] }} }, sort: [{ _score: 'desc' }, { price: 'asc' }], highlight: { fields: { name: {}, description: {} } }, from: 0, size: 20 } }); ```

// Create index with explicit mapping
await client.indices.create({
  index: 'products',
  mappings: {
    properties: {
      name: { type: 'text', analyzer: 'english' },
      'name.keyword': { type: 'keyword' },  // for exact match and sorting
      description: { type: 'text' },
      price: { type: 'double' },
      category: { type: 'keyword' },
      tags: { type: 'keyword' },
      inStock: { type: 'boolean' },
      createdAt: { type: 'date' }
    }
  }
});

// Analytics aggregations const analytics = await client.search({ index: 'orders', body: { query: { range: { createdAt: { gte: 'now-30d' } } }, aggs: { daily_revenue: { date_histogram: { field: 'createdAt', calendar_interval: 'day' }, aggs: { revenue: { sum: { field: 'total' } } } }, top_products: { terms: { field: 'productId', size: 10 }, aggs: { total_sales: { sum: { field: 'quantity' } } } } }, size: 0 // no documents, only aggregations } }); ```