Trait RequestView 

pub trait RequestView {
    // Required method
    fn query(&self) -> Option<&str>;

    // Provided methods
    fn is_read_only(&self) -> bool { ... }
    fn database(&self) -> Option<&str> { ... }
    fn client_id(&self) -> Option<&str> { ... }
    fn tenant_id(&self) -> Option<&str> { ... }
}

Read-only view of per-request metadata.

Every method returns Option where appropriate so implementations can return None when the underlying carrier doesn’t track that field. Consumers that need a field unconditionally should guard with .ok_or(Error::…) at the call site.

Required Methods

fn query(&self) -> Option<&str>

SQL text of the query being processed, if this request carries a query. Returns None for non-SQL protocol messages (e.g. Terminate, Sync) or for contexts that don’t carry SQL.

Provided Methods

fn is_read_only(&self) -> bool

Whether the query is a read-only operation (SELECT / SHOW / …). Defaults to false for safety — an implementation that cannot classify a query should leave the default.

fn database(&self) -> Option<&str>

Target database from the client’s startup message.

fn client_id(&self) -> Option<&str>

Stable client session identifier.

fn tenant_id(&self) -> Option<&str>

Tenant identifier, for multi-tenant deployments.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl RequestView for QueryContext

Available on crate feature wasm-plugins only.