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Скачать или смотреть Solving the Elasticsearch POST /delete_by_query Issue: Understanding Index Mapping

  • vlogize
  • 2025-10-06
  • 0
Solving the Elasticsearch POST /delete_by_query Issue: Understanding Index Mapping
Elasticsearch POST /delete_by_query not workingelasticsearch
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Описание к видео Solving the Elasticsearch POST /delete_by_query Issue: Understanding Index Mapping

Discover why your Elasticsearch DELETE query isn't working and how to fix it by understanding index mapping and proper key usage.
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This video is based on the question https://stackoverflow.com/q/64026608/ asked by the user 'Varid Vaya' ( https://stackoverflow.com/u/13892628/ ) and on the answer https://stackoverflow.com/a/64027687/ provided by the user 'Varid Vaya' ( https://stackoverflow.com/u/13892628/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

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Solving the Elasticsearch POST /delete_by_query Issue: Understanding Index Mapping

When working with Elasticsearch, you might encounter situations where your commands don't execute as expected, leaving you scratching your head. A common scenario is when using the POST /delete_by_query, which seemingly fails to delete documents without throwing any errors. In this guide, we'll address this problem in detail, helping you understand why it happens and how to resolve it effectively.

The Problem: Query Not Deleting Documents

You may find yourself executing a POST /delete_by_query request to clean up specific documents in your Elasticsearch index. However, you may notice that while it works fine on some indices, it fails on others. This inconsistency can lead to frustrating debugging sessions when no clear error messages are provided.

Example Query

Here’s a sample of what a typical delete query may look like:

[[See Video to Reveal this Text or Code Snippet]]

The Solution: Understanding Index Mapping

The root cause of the issue often lies in the index mapping of your Elasticsearch documents. In this scenario, it was discovered that the query wasn’t targeting the correct data type. Specifically, instead of using myAttributeKey1, the correct term to use was myAttributeKey1.keyword. Let's dive deeper into this.

Index Mapping Example

Here’s a sample of how the index mapping was initially set up:

[[See Video to Reveal this Text or Code Snippet]]

In this configuration, myAttributeKey1 is defined as a text type, which is typically used for full-text searches and does not support exact match queries. To perform accurate deletions on this field, you need to refer to the keyword version.

Correct Mapping Example

To ensure your delete_by_query executes successfully, you should modify the mapping to resemble something like this:

[[See Video to Reveal this Text or Code Snippet]]

In this correct configuration, myAttributeKey1 is now set as a keyword, allowing for exact matches during your queries.

Conclusion: The Importance of Index Mapping

Understanding how index mapping works in Elasticsearch is crucial for executing queries successfully, particularly for deletion tasks. If your POST /delete_by_query doesn’t perform as expected, always check your index mapping configuration to ensure you’re targeting the correct fields.

By using the correct mapping and understanding the data types, you can streamline your queries and avoid unnecessary troubleshooting. Adapting your queries based on the data structure is key to successful database management and ensures your commands work seamlessly across all indices.

Now that you're equipped with the knowledge to fix the delete_by_query issue, you can confidently manage your Elasticsearch documents with ease!

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