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Target customers: users who need to query logs in the following scenarios. Log Service provides the index-based query feature. However, in some scenarios, indexes cannot be created or used. Examples: 1. Indexes are not created for some fields to reduce costs. In this scenario, an urgent need to query historical logs may not be filled. 2. The length of a field value exceeds the upper limit supported by indexes. In this scenario, the excess part cannot be queried. 3. A large number of field names are involved and cannot be obtained in advance. In this scenario, field indexes cannot be created. 4. The type of a field is changed. In this scenario, the field cannot be queried. Features released: Log Service provides the scan-based analysis feature that allows you to analyze logs based on specific fields without the need to configure indexes for the fields.