package
11.5.1+incompatible
Repository: https://github.com/grafana/grafana.git
Documentation: pkg.go.dev
# README
Query service
This query service aims to replace the existing /api/ds/query.
The key differences are:
- This service has a stronger type system (not simplejson)
- Same workflow regardless if expressions exist
- Datasource settings+access is managed in each datasource, not at the beginning
Current /api/ds/query workflow
sequenceDiagram
autonumber
actor User as User or Process
participant api as /api/ds/query
participant db as Storage<br/>(SQL)
participant ds as Datasource<br/>Plugin
participant expr as Expression<br/>Engine
User->>api: POST Query
loop Each query
api->>api: Parse query
api->>db: Get ds config<br>and secrets
db->>api:
end
alt No expressions
alt Single datasource
api->>ds: QueryData
else Multiple datasources
loop Each datasource (concurrently)
api->>ds: QueryData
end
api->>api: Wait for results
end
else Expressions exist
api->>expr: Calculate expressions graph
loop Each node (eg, refID)
alt Is query
expr->>ds: QueryData
else Is expression
expr->>expr: Process
end
end
end
api->>User: return results
/apis/query.grafana.app (in single tenant grafana)
sequenceDiagram
autonumber
actor User as User or Process
participant api as /apis/query.grafana.app
participant ds as Datasource<br/>Handler/Plugin
participant db as Storage<br/>(SQL)
participant expr as Expression<br/>Engine
User->>api: POST Query
api->>api: Parse queries
api->>api: Calculate dependencies
loop Each datasource (concurrently)
api->>ds: QueryData
ds->>ds: Verify user access
ds->>db: Get settings <br> and secrets
end
loop Each expression
api->>expr: Execute
end
api->>api: Verify ResultExpectations
api->>User: return results
# Functions
No description provided by the author
No description provided by the author
No description provided by the author
No description provided by the author
No description provided by the author
No description provided by the author
# Variables
No description provided by the author
# Structs
No description provided by the author
No description provided by the author
No description provided by the author
# Interfaces
The query runner interface.