Struct NodeOutput 

pub struct NodeOutput {
    pub port: String,
    pub data: RelPtr<()>,
    pub schema_hash: u64,
    pub error_message: Option<String>,
}

Output from a node execution.

Fields

port: String

The output port that was activated.

data: RelPtr<()>

Pointer to the output data in the arena.

schema_hash: u64

Schema hash of the output data.

error_message: Option<String>

Optional error message (for error outputs without arena data).

Implementations

impl NodeOutput

pub fn new<T>(port: impl Into<String>, data: RelPtr<T>) -> Self

Create a new node output.

pub fn out<T>(data: RelPtr<T>) -> Self

Create output on the default “out” port.

pub fn error<T>(data: RelPtr<T>) -> Self

Create output on the “error” port with arena data.

pub fn error_with_message(message: impl Into<String>) -> Self

Create output on the “error” port with a message string.

Use this when you have an error message but no arena data to write. The error message will be available for logging and debugging.

pub fn on_true<T>(data: RelPtr<T>) -> Self

Create output on the “true” port (for switch nodes).

pub fn on_false<T>(data: RelPtr<T>) -> Self

Create output on the “false” port (for switch nodes).

pub fn with_schema_hash(self, hash: u64) -> Self

Set the schema hash.

pub fn has_error_message(&self) -> bool

Check if this output has an error message.

pub fn get_error_message(&self) -> Option<&str>

Get the error message, if any.

pub fn arena_location(&self) -> (ArenaOffset, u32)

Get the arena location (offset and size) of the output data.

Returns (offset, size) tuple for use in WAL records and crash recovery. Returns (ArenaOffset::NULL, 0) if the data pointer is null.

Trait Implementations

impl Debug for NodeOutput

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.