During review of the possible n1ql query options with Marco we settled on exposing the following from the SDK directly in addition to the ones already present:
for fine-tuning the request performance (similar to max_parallelism which we expose already)
- scan_cap: Maximum buffered channel size between the indexer client and the query service for index scans. This parameter controls when to use scan backfill. Use 0 or a negative number to disable.
- pipeline_batch: Controls the number of items execution operators can batch for Fetch from the KV.
- pipeline_cap: Maximum number of items each execution operator can buffer between various operators.
also, if the user knows the request is only ever a select, for security reasons it can make sense to tell the server this thing is readonly and it will prevent mutations from happening.
- readonly: Controls whether a query can change a resulting recordset.
If readonly is true, then the following statements are not allowed:
Note that https://developer.couchbase.com/documentation/server/5.0/settings/query-settings.html has these params documented but the docs are wrong at the time of ticket creation (it shows - and not _ when describing the on the wire representation of the param)