Details
Major Description
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:
CREATE INDEX
DROP INDEX
INSERT
MERGE
UPDATE
UPSERT
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)
Attachments
Activity
Build 5.1.0-1448 contains gocb commit 2f462ae8c10e15d143c0b6cfb98825264e192ef2 with commit message:
GOCBC-226: Added additional N1QL query parameters.
https://github.com/couchbase/gocb/commit/2f462ae8c10e15d143c0b6cfb98825264e192ef2
Build 5.0.1-4738 contains gocb commit 2f462ae8c10e15d143c0b6cfb98825264e192ef2 with commit message:
GOCBC-226: Added additional N1QL query parameters.
https://github.com/couchbase/gocb/commit/2f462ae8c10e15d143c0b6cfb98825264e192ef2
Build sync_gateway-2.1.0-839 contains gocb commit 2f462ae8c10e15d143c0b6cfb98825264e192ef2 with commit message:
GOCBC-226: Added additional N1QL query parameters.
https://github.com/couchbase/gocb/commit/2f462ae8c10e15d143c0b6cfb98825264e192ef2
Hope you’re well, Anthony.
[1]Support-internal@couchbase.com has [2]staff_se@couchbase.com nested within it, which you are a member of.
Would you like me to take you off staff_se@couchbase.com?
From: "Anthony Poliseno (Marketing)" <anthony.poliseno@couchbase.com>
Date: Wednesday, August 23, 2017 at 10:29 AM
To: "Anthony Galvez (IT)" <Anthony.Galvez@couchbase.com>
Subject: FW: Couchbase Issues: (
JSCBC-412) Expose more N1QL Query OptionsHey hey – any way I can get taken off these emails? Thanks!
From: "Brett Lawson (Couchbase JIRA)" <community_admin@couchbase.com>
Date: Wednesday, August 23, 2017 at 10:17 AM
To: support-internal <support-internal@couchbase.com>
Subject: Couchbase Issues: (
JSCBC-412) Expose more N1QL Query Options[3]Tyler Mitchell created an issue
[4]Couchbase node.js Client Library / [5][6]JSCBC-412
[7]Expose more N1QL Query Options
Issue Type:
Improvement
Assignee:
[8]Brett Lawson
Components:
library
Created:
23/Aug/17 10:16 AM
Fix Versions:
2.4.0
Priority:
Major
Reporter:
[9]Tyler Mitchell
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:
CREATE INDEX
DROP INDEX
INSERT
MERGE
UPDATE
UPSERT
Note that [10]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)
[11]
[12]Add Comment
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----------------------------------------------------------------------------------------
[1] Support-internal@couchbase.com
[2] staff_se@couchbase.com
[3] https://issues.couchbase.com/secure/ViewProfile.jspa?name=tyler.mitchell
[4] https://issues.couchbase.com/browse/JSCBC
[5] https://issues.couchbase.com/browse/JSCBC-412
[6] https://issues.couchbase.com/browse/JSCBC-412
[7] https://issues.couchbase.com/browse/JSCBC-412
[8] https://issues.couchbase.com/secure/ViewProfile.jspa?name=brett19
[9] https://issues.couchbase.com/secure/ViewProfile.jspa?name=tyler.mitchell
[10] https://developer.couchbase.com/documentation/server/5.0/settings/query-settings.html
[11] https://issues.couchbase.com/browse/JSCBC-412#add-comment
[12] https://issues.couchbase.com/browse/JSCBC-412#add-comment