Presto C++ Sidecar¶

Endpoints¶

The following HTTP endpoints are implemented by the Presto C++ sidecar.

GET /v1/properties/session()¶

Returns a list of system session properties supported by the Presto C++ worker. Each session property is serialized to JSON in format SessionPropertyMetadata.

GET /v1/functions()¶

Returns a list of function metadata for all functions registered in the Presto C++ worker. Each function’s metadata is serialized to JSON in format JsonBasedUdfFunctionMetadata.

POST /v1/velox/plan()¶

Converts a Presto plan fragment to its corresponding Velox plan and validates the Velox plan. Returns any errors encountered during plan conversion.

Configuration Properties¶

The following properties should be set on the Presto C++ sidecar:

native-sidecar¶

• Type: boolean

• Default value: false

Set this to true to configure the Presto C++ worker as a sidecar.

presto.default-namespace¶

• Type: string

• Default value: "native.default"

All functions registered in Presto are named in format catalog.schema.function_name, this property defines the prefix used to register all Presto C++ functions. The default namespace should be of type catalog.schema and it is recommended to set it to native.default.