Function extract_from_pgwire_params

nodedb/src/control/trace_context.rs:53–60

Extract a `TraceId` from a pgwire startup parameter map. PostgreSQL clients can pass custom parameters during connection: `options=-c trace_id=<32 hex chars>`

(params: &std::collections::HashMap<String, String>)

/// PostgreSQL clients can pass custom parameters during connection:
/// `options=-c trace_id=<32 hex chars>`
pub fn extract_from_pgwire_params(params: &std::collections::HashMap<String, String>) -> TraceId {
    if let Some(val) = params.get("trace_id")
        && let Ok(tid) = val.parse::<TraceId>()
    {
        return tid;
    }
    TraceId::generate()
}

/// Create a tracing span with the `trace_id` attached via its `Display` form
/// (32 lowercase hex chars).