Mongo C# driver find multiple and delete

I'm using collection.FindOneAndDeleteAsync, but this uses a ton of cpu when used to get many documents. What's the best way to go about finding multiple documents(anywhere from 100 to 50k) and delete, using the c# mongo driver?

Thanks

asked Nov 15 '18 at 22:57

Victornor

385

As long as you don't also need the deleted documents returned, DeleteMany will give you the best performance. Is that an option for you?

– JohnnyHK
Nov 15 '18 at 23:05

The issue is, that i do. That's why i'm using FindOneAndDelete.

– Victornor
Nov 15 '18 at 23:13

Would it be better to FindMany and then remove those after?

– Victornor
Nov 15 '18 at 23:13

@JohnnyHK Thanks. Feel free to add as answer and i'll pick it. Really just needed to know the most efficient way to do this.

– Victornor
Nov 17 '18 at 19:31

add a comment |

Thanks

asked Nov 15 '18 at 22:57

Victornor

385

As long as you don't also need the deleted documents returned, DeleteMany will give you the best performance. Is that an option for you?

– JohnnyHK
Nov 15 '18 at 23:05

The issue is, that i do. That's why i'm using FindOneAndDelete.

– Victornor
Nov 15 '18 at 23:13

Would it be better to FindMany and then remove those after?

– Victornor
Nov 15 '18 at 23:13

@JohnnyHK Thanks. Feel free to add as answer and i'll pick it. Really just needed to know the most efficient way to do this.

– Victornor
Nov 17 '18 at 19:31

add a comment |

Thanks

asked Nov 15 '18 at 22:57

Victornor

385

Thanks

c# mongodb

asked Nov 15 '18 at 22:57

Victornor

385

asked Nov 15 '18 at 22:57

Victornor

385

asked Nov 15 '18 at 22:57

Victornor

385

asked Nov 15 '18 at 22:57

Victornor

385

asked Nov 15 '18 at 22:57

Victornor

385

As long as you don't also need the deleted documents returned, DeleteMany will give you the best performance. Is that an option for you?

– JohnnyHK
Nov 15 '18 at 23:05

The issue is, that i do. That's why i'm using FindOneAndDelete.

– Victornor
Nov 15 '18 at 23:13

Would it be better to FindMany and then remove those after?

– Victornor
Nov 15 '18 at 23:13

@JohnnyHK Thanks. Feel free to add as answer and i'll pick it. Really just needed to know the most efficient way to do this.

– Victornor
Nov 17 '18 at 19:31

add a comment |

As long as you don't also need the deleted documents returned, DeleteMany will give you the best performance. Is that an option for you?

– JohnnyHK
Nov 15 '18 at 23:05

The issue is, that i do. That's why i'm using FindOneAndDelete.

– Victornor
Nov 15 '18 at 23:13

Would it be better to FindMany and then remove those after?

– Victornor
Nov 15 '18 at 23:13

@JohnnyHK Thanks. Feel free to add as answer and i'll pick it. Really just needed to know the most efficient way to do this.

– Victornor
Nov 17 '18 at 19:31

As long as you don't also need the deleted documents returned, DeleteMany will give you the best performance. Is that an option for you?

– JohnnyHK
Nov 15 '18 at 23:05

The issue is, that i do. That's why i'm using FindOneAndDelete.

– Victornor
Nov 15 '18 at 23:13

Would it be better to FindMany and then remove those after?

– Victornor
Nov 15 '18 at 23:13

@JohnnyHK Thanks. Feel free to add as answer and i'll pick it. Really just needed to know the most efficient way to do this.

– Victornor
Nov 17 '18 at 19:31

add a comment |

1 Answer
1

active

oldest

votes

You need to Find the docs you want to delete, and then delete them using DeleteMany with a filter of _id: $in: ids, where ids is an enumerable of the _id values of those documents.

C# example:

public class Entity

 public ObjectId id get; set; 
 public string name get; set; 


// Find the documents to delete
var test = db.GetCollection<Entity>("test");
var filter = new BsonDocument();
var docs = test.Find(filter).ToList();

// Get the _id values of the found documents
var ids = docs.Select(d => d.id);

// Create an $in filter for those ids
var idsFilter = Builders<Entity>.Filter.In(d => d.id, ids);

// Delete the documents using the $in filter
var result = test.DeleteMany(idsFilter);

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

Thanks, sorry for the delay.

– Victornor
Nov 25 '18 at 14:35

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

You need to Find the docs you want to delete, and then delete them using DeleteMany with a filter of _id: $in: ids, where ids is an enumerable of the _id values of those documents.

C# example:

public class Entity

 public ObjectId id get; set; 
 public string name get; set; 


// Find the documents to delete
var test = db.GetCollection<Entity>("test");
var filter = new BsonDocument();
var docs = test.Find(filter).ToList();

// Get the _id values of the found documents
var ids = docs.Select(d => d.id);

// Create an $in filter for those ids
var idsFilter = Builders<Entity>.Filter.In(d => d.id, ids);

// Delete the documents using the $in filter
var result = test.DeleteMany(idsFilter);

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

Thanks, sorry for the delay.

– Victornor
Nov 25 '18 at 14:35

add a comment |

You need to Find the docs you want to delete, and then delete them using DeleteMany with a filter of _id: $in: ids, where ids is an enumerable of the _id values of those documents.

C# example:

public class Entity

 public ObjectId id get; set; 
 public string name get; set; 


// Find the documents to delete
var test = db.GetCollection<Entity>("test");
var filter = new BsonDocument();
var docs = test.Find(filter).ToList();

// Get the _id values of the found documents
var ids = docs.Select(d => d.id);

// Create an $in filter for those ids
var idsFilter = Builders<Entity>.Filter.In(d => d.id, ids);

// Delete the documents using the $in filter
var result = test.DeleteMany(idsFilter);

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

Thanks, sorry for the delay.

– Victornor
Nov 25 '18 at 14:35

add a comment |

You need to Find the docs you want to delete, and then delete them using DeleteMany with a filter of _id: $in: ids, where ids is an enumerable of the _id values of those documents.

C# example:

public class Entity

 public ObjectId id get; set; 
 public string name get; set; 


// Find the documents to delete
var test = db.GetCollection<Entity>("test");
var filter = new BsonDocument();
var docs = test.Find(filter).ToList();

// Get the _id values of the found documents
var ids = docs.Select(d => d.id);

// Create an $in filter for those ids
var idsFilter = Builders<Entity>.Filter.In(d => d.id, ids);

// Delete the documents using the $in filter
var result = test.DeleteMany(idsFilter);

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

You need to Find the docs you want to delete, and then delete them using DeleteMany with a filter of _id: $in: ids, where ids is an enumerable of the _id values of those documents.

C# example:

public class Entity

 public ObjectId id get; set; 
 public string name get; set; 


// Find the documents to delete
var test = db.GetCollection<Entity>("test");
var filter = new BsonDocument();
var docs = test.Find(filter).ToList();

// Get the _id values of the found documents
var ids = docs.Select(d => d.id);

// Create an $in filter for those ids
var idsFilter = Builders<Entity>.Filter.In(d => d.id, ids);

// Delete the documents using the $in filter
var result = test.DeleteMany(idsFilter);

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

answered Nov 17 '18 at 23:16

JohnnyHK

211k41451375

Thanks, sorry for the delay.

– Victornor
Nov 25 '18 at 14:35

add a comment |

Thanks, sorry for the delay.

– Victornor
Nov 25 '18 at 14:35

Thanks, sorry for the delay.

– Victornor
Nov 25 '18 at 14:35

add a comment |

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