Hi everyone,
I’m Darshan Hiranandani, working with a Time Series collection in MongoDB and I’m facing an issue when trying to delete documents between two dates. Here are the parameters for my collection:
timeseries: {
timeField: “timestamp”,
granularity: “seconds”
}
The collection contains market price data for an asset, and due to a change in the price calculation, I need to delete documents within a specific date range before reinserting them with corrections.
However, I’m encountering a limitation when trying to delete documents based on the timestamp field. According to the documentation, delete commands on Time Series collections only support queries matching metaField values.
This is where I get confused:
- The
timestampfield is the main index for the time series. Why can’t I use it to match documents for deletion? - Am I misunderstanding the purpose of Time Series collections in MongoDB?
- How can I delete documents between two dates? I’m considering adding the
timestampin themetaField, but that feels redundant, and I’m unsure of the performance impact.
For reference, this is how I’ve attempted the operation in Go:
filter := bson.D{{
Key: “timestamp”,
Value: bson.D{
{
Key: “$gte”,
Value: timestamp_start,
},
{
Key: “$lt”,
Value: timestamp_end,
},
},
}}
result, err := coll.DeleteMany(context.TODO(), filter)
But I’m getting this error:
“Cannot perform an update or delete on a time-series collection when querying on a field that is not the metaField.”
Has anyone else run into this issue or found a workaround? Any help would be greatly appreciated!
Regards
Darshan Hiranandani
