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I want to store enum values in MongoDB collection. Can I effectively store them as strings? Will it affect index performance in comparison with enum values as ints? Does Mongo indexer optimize string indexes in the case when they contain only few fixed options as string values, to achieve speed similar to querying index by sorted integer?
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So enum creates a validator and checks if the value is given in an array. E.g: const userSchema = new mongoose. Schema({ userType: { type: String, enum : ['user','admin'], default: 'user' }, }) Follow this answer to receive notifications.
Yes, Spring Data MongoDB supports enums. Just use them in your domain model.
In MySQL, an ENUM is a string object whose value is chosen from a list of permitted values defined at the time of column creation. The ENUM data type provides the following advantages: Compact data storage. MySQL ENUM uses numeric indexes (1, 2, 3, …) to represents string values.
Enum, which is also known as enumeration, is a user-defined data type that enables you to create a new data type that has a fixed range of possible values, and the variable can select one value from the set of values.
Storing enum values in MongoDB as strings is perfectly fine, and yes, if you index the field I'd expect the performance to be comparable to indexed integer queries. It's certainly more expressive than using integers.
The only real downside is that they'll take more space if your enum strings are somewhat long, but that's a pretty trivial concern.
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