Enum DriverError 

pub enum DriverError {
    Io(Error),
    Auth(String),
    Protocol(String),
    Server {
        code: [u8; 5],
        message: Box<str>,
        detail: Option<Box<str>>,
        hint: Option<Box<str>>,
        position: Option<u32>,
    },
    Pool(String),
}

Error type for all bsql-driver-postgres operations.

Variants cover the four failure modes: I/O, authentication, wire protocol violations, server-reported errors, and pool management.

Example

use bsql_driver_postgres::DriverError;

fn handle_error(err: DriverError) {
    match err {
        DriverError::Io(e) => eprintln!("network error: {e}"),
        DriverError::Auth(msg) => eprintln!("auth failed: {msg}"),
        DriverError::Protocol(msg) => eprintln!("protocol error: {msg}"),
        DriverError::Server { code, message, position, .. } => {
            let code_str = std::str::from_utf8(&code).unwrap_or("?????");
            eprintln!("PG error [{code_str}]: {message} (pos: {position:?})");
        }
        DriverError::Pool(msg) => eprintln!("pool error: {msg}"),
    }
}

Variants

Io(Error)

TCP/TLS I/O failure.

Auth(String)

Authentication failure (wrong password, unsupported mechanism, etc.).

Protocol(String)

Wire protocol violation (malformed message, unexpected message type, etc.).

Server

Server-reported error (invalid SQL, constraint violation, etc.).

Fields

code: [u8; 5]

SQLSTATE error code — always exactly 5 ASCII bytes.

The SQL standard (ISO/IEC 9075) defines SQLSTATE as a 5-character code: 2-character class + 3-character subclass. PostgreSQL follows this strictly — every error response contains a 5-byte 'C' field.

Stored as [u8; 5] instead of String or Box<str> because:

• The length is fixed by the SQL standard (always 5, never more, never less)
• Eliminates a heap allocation per server error
• Shrinks DriverError by 11 bytes (16-byte Box → 5-byte array)
• Shrinks every Result<T, DriverError> on the stack

Compare with string literals using byte strings: &err.code == b"23505"

message: Box<str>

Human-readable error message.

detail: Option<Box<str>>

Optional detail text.

hint: Option<Box<str>>

Optional hint text.

position: Option<u32>

Character position in the original query where the error occurred (1-indexed).

Pool(String)

Connection pool error (exhaustion, misconfiguration).

Trait Implementations

impl Debug for DriverError

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

Formats the value using the given formatter.

impl Display for DriverError

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

Formats the value using the given formatter.

impl Error for DriverError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for DriverError

fn from(e: Error) -> Self

Converts to this type from the input type.