Wildcard index

javascript

db.events.createIndex({ "$**": 1 })

Explanation

Wildcard indexes can help when documents contain highly variable keys, though they should be used carefully.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Fast equality lookups on one field.

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Support multi-field filters and sorts.

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Index documents that contain array values.

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Index only documents matching a filter.

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Expire documents automatically after a period.

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Inspect planner and runtime behavior.

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