Full-Text Search with Analyzers

Analyzers are the heart of full-text search.

Standard Analyzer

{
  "analyzer": "standard"
}

Splits text by language rules.

Custom Analyzer Example

{
  "analysis": {
    "analyzer": {
      "my_custom": {
        "tokenizer": "standard",
        "filter": ["lowercase", "asciifolding"]
      }
    }
  }
}

Language Analyzers

• english
• french
• german

Tips

• Use .keyword fields for exact matches
• Choose analyzer based on content language
• Reindexing is needed if analyzer changes

Mistake: Using standard analyzer for product SKUs → they get split into wrong tokens.