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Create a Custom Analyzer

  • how-to
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    Create a custom analyzer with the Couchbase Capella UI’s Advanced Mode to modify the input text from a Search query or Search index and improve search results.
    You must use Advanced Mode to add a custom analyzer to your Search index. For more information, see Create a Basic Search Index in Advanced Mode.

    For more information, see Search Index Features.

    Prerequisites

    • You have the Search Service enabled on a node in your database. For more information about how to change Services on your database, see Modify a Database.

    • You have created an index with Advanced Mode.

    • You have logged in to the Couchbase Capella UI.

    Procedure

    To create a custom analyzer with the Capella UI in Advanced Mode:

    1. On the Databases page, select the database that has the Search index you want to edit.

    2. Go to Data Tools  Search.

    3. Click the index where you want to create a custom analyzer.

    4. Under Advanced Settings, expand Analyzers.

      Make sure you use Advanced Mode.

    5. Click Add Analyzer.

    6. In the Name field, enter a name for the new custom analyzer.

    7. To remove specific characters from search input before tokenizing, in the Character Filters list, do one of the following:

      1. To add a character filter to your analyzer, click a character filter. You can select a default character filter or create your own.

        For more information, see Default Character Filters or Create a Custom Character Filter.

      2. To remove a character filter from your analyzer, click the x on a character filter.

    8. In the Tokenizer list, click the tokenizer you want to use to create tokens from Search input. You can select a default tokenizer or create your own.

      For more information, see Default Tokenizers or Create a Custom Tokenizer.

    9. To modify the tokens created by the tokenizer, in the Token Filters list, do one of the following:

      1. To add a token filter to your analyzer, click a token filter. You can select a default token filter or create your own.

        For more information, see Default Token Filters or Create a Custom Token Filter.

      2. To remove a token filter from your analyzer, click the x on a token filter.

    10. Click Submit.

    Next Steps

    After you create a custom analyzer, you can set it as the default analyzer for your Search index.

    You can also use the custom analyzer when you create a type mapping with Advanced Mode, a child mapping or a child field.

    To continue customizing your Search index, you can also:

    To run a search and test the contents of your Search index, see Run A Simple Search with the Capella UI.