Mongodb - proper way to delete all elements in an array field?

Question

I'm looking for the proper way to remove all elements from an array field (across all documents) in Mongodb - these appear to be equivalent, which is recommended: (or perhaps some other way?) ``` db.collection.update({}, { $pull : { 'myArray': {} }}, {multi:true} ) ``` or ``` db.collection.update({}, { $set : {'myArray': [] }} , {multi:true} ) ```

Accepted Answer

The `$set` variant will be faster as the `$pull` will have to do calculations on arrays. I am actually not even certain whether it will work, as you're not really removing any elements with your query.

Mongodb - proper way to delete all elements in an array field?

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