risingwavelabs/risingwave · error · ErrorCode::BindError

Bind error: {0}

Error message

Bind error: {0}

What it means

`ErrorCode::BindError` is a plain-string bind-phase error (`#[message] String`). The binder resolves names, types, and function signatures; failures here that don't fit a more specific code (and lack an attached expression) are reported with this string. TODO comments note it should be replaced by `BindErrorRoot`.

Source

Thrown at src/frontend/src/error.rs:118

    ),
    #[error("Stream error: {0}")]
    StreamError(
        #[backtrace]
        #[source]
        BoxedError,
    ),
    // TODO(error-handling): there's a limitation that `#[transparent]` can't be used with `#[backtrace]` if no `#[from]`
    // So we emulate a transparent error with "{0}" display here.
    #[error("{0}")]
    RpcError(
        #[source]
        #[backtrace]
        // `tonic::transport::Error`, `TonicStatusWrapper`, or `RpcError`
        BoxedError,
    ),
    // TODO: use a new type for bind error
    // TODO(error-handling): should prefer use error types than strings.
    #[error("Bind error: {0}")]
    BindError(#[message] String),
    // TODO: only keep this one
    #[error("Failed to bind expression: {expr}: {error}")]
    BindErrorRoot {
        expr: String,
        #[source]
        #[backtrace]
        error: BoxedError,
    },
    #[error(transparent)]
    CastError(
        #[from]
        #[backtrace]
        CastError,
    ),
    #[error("Catalog error: {0}")]
    CatalogError(
        #[source]

View on GitHub (pinned to 6469eb736d)

Solutions

1. Read the message text — it names the unresolved symbol or bad argument
2. Qualify identifiers with the correct schema (`schema.table`)
3. Check function signatures with `SHOW FUNCTIONS` or docs for correct arity/types
4. Prefer diagnosing via the related `Failed to bind expression` error if one is also raised

Example fix

-- before
SELECT my_func(a) FROM public.t; -- BindError: function my_func(int) does not exist
-- after
SELECT public.my_func(a::int) FROM public.t;

-- pre-flight: confirm objects exist and functions are known
SELECT 1 FROM pg_tables WHERE schemaname='public' AND tablename='t';
SHOW FUNCTIONS LIKE 'my_func%';

fn is_bind_error(e: &RwError) -> bool { matches!(e.get_code(), ErrorCode::BindError(_)) }

match err.get_code() { ErrorCode::BindError(msg) => eprintln!("bind failed: {msg}"), _ => propagate }

When it happens

Trigger: Binder calls fail with only a message available: unresolved context, invalid argument counts/types for functions in unusual call sites, or internal binder assumptions broken during name/type resolution of a statement.

Common situations: Typo'd or ambiguous identifiers, calling functions with wrong arity, using objects in contexts where they aren't visible, or legacy paths still emitting string-only bind errors.

Understand the failure class

Background: "Must be a positive integer", "Invalid value", "Unsupported": the invalid-argument-value error family, when a library rejects the value you pass — this error's family across 35 libraries.

Related errors

• {} must contain 1 argument
• relative_error={} does not satisfy 0.0 < relative_error < 1.
• {object_type} not found: {name}
• Not supported: {0}\nHINT: {1}
• Failed to bind expression: {expr}: {error}

AI-assisted analysis of risingwavelabs/risingwave@6469eb736d (2026-09-11). Data as JSON: /api/errors/d55cb6a8f39c8a00. Report an issue: GitHub.