mirror of
https://github.com/isar/rusqlite.git
synced 2025-04-02 04:12:59 +08:00
302 lines
12 KiB
Rust
302 lines
12 KiB
Rust
use crate::types::Type;
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use crate::{errmsg_to_string, ffi};
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use std::error;
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use std::fmt;
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use std::os::raw::c_int;
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use std::path::PathBuf;
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use std::str;
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/// Enum listing possible errors from rusqlite.
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#[derive(Debug)]
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#[allow(clippy::enum_variant_names)]
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pub enum Error {
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/// An error from an underlying SQLite call.
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SqliteFailure(ffi::Error, Option<String>),
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/// Error reported when attempting to open a connection when SQLite was
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/// configured to allow single-threaded use only.
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SqliteSingleThreadedMode,
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/// Error when the value of a particular column is requested, but it cannot
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/// be converted to the requested Rust type.
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FromSqlConversionFailure(usize, Type, Box<dyn error::Error + Send + Sync>),
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/// Error when SQLite gives us an integral value outside the range of the
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/// requested type (e.g., trying to get the value 1000 into a `u8`).
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/// The associated `usize` is the column index,
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/// and the associated `i64` is the value returned by SQLite.
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IntegralValueOutOfRange(usize, i64),
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/// Error converting a string to UTF-8.
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Utf8Error(str::Utf8Error),
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/// Error converting a string to a C-compatible string because it contained
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/// an embedded nul.
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NulError(::std::ffi::NulError),
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/// Error when using SQL named parameters and passing a parameter name not
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/// present in the SQL.
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InvalidParameterName(String),
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/// Error converting a file path to a string.
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InvalidPath(PathBuf),
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/// Error returned when an `execute` call returns rows.
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ExecuteReturnedResults,
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/// Error when a query that was expected to return at least one row (e.g.,
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/// for `query_row`) did not return any.
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QueryReturnedNoRows,
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/// Error when the value of a particular column is requested, but the index
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/// is out of range for the statement.
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InvalidColumnIndex(usize),
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/// Error when the value of a named column is requested, but no column
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/// matches the name for the statement.
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InvalidColumnName(String),
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/// Error when the value of a particular column is requested, but the type
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/// of the result in that column cannot be converted to the requested
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/// Rust type.
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InvalidColumnType(usize, Type),
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/// Error when a query that was expected to insert one row did not insert
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/// any or insert many.
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StatementChangedRows(usize),
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/// Error returned by `functions::Context::get` when the function argument
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/// cannot be converted to the requested type.
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#[cfg(feature = "functions")]
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InvalidFunctionParameterType(usize, Type),
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/// Error returned by `vtab::Values::get` when the filter argument cannot
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/// be converted to the requested type.
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#[cfg(feature = "vtab")]
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InvalidFilterParameterType(usize, Type),
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/// An error case available for implementors of custom user functions (e.g.,
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/// `create_scalar_function`).
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#[cfg(feature = "functions")]
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#[allow(dead_code)]
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UserFunctionError(Box<dyn error::Error + Send + Sync>),
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/// Error available for the implementors of the `ToSql` trait.
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ToSqlConversionFailure(Box<dyn error::Error + Send + Sync>),
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/// Error when the SQL is not a `SELECT`, is not read-only.
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InvalidQuery,
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/// An error case available for implementors of custom modules (e.g.,
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/// `create_module`).
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#[cfg(feature = "vtab")]
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#[allow(dead_code)]
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ModuleError(String),
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#[cfg(feature = "functions")]
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UnwindingPanic,
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}
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impl PartialEq for Error {
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fn eq(&self, other: &Error) -> bool {
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match (self, other) {
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(Error::SqliteFailure(e1, s1), Error::SqliteFailure(e2, s2)) => e1 == e2 && s1 == s2,
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(Error::SqliteSingleThreadedMode, Error::SqliteSingleThreadedMode) => true,
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(Error::IntegralValueOutOfRange(i1, n1), Error::IntegralValueOutOfRange(i2, n2)) => {
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i1 == i2 && n1 == n2
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}
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(Error::Utf8Error(e1), Error::Utf8Error(e2)) => e1 == e2,
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(Error::NulError(e1), Error::NulError(e2)) => e1 == e2,
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(Error::InvalidParameterName(n1), Error::InvalidParameterName(n2)) => n1 == n2,
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(Error::InvalidPath(p1), Error::InvalidPath(p2)) => p1 == p2,
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(Error::ExecuteReturnedResults, Error::ExecuteReturnedResults) => true,
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(Error::QueryReturnedNoRows, Error::QueryReturnedNoRows) => true,
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(Error::InvalidColumnIndex(i1), Error::InvalidColumnIndex(i2)) => i1 == i2,
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(Error::InvalidColumnName(n1), Error::InvalidColumnName(n2)) => n1 == n2,
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(Error::InvalidColumnType(i1, t1), Error::InvalidColumnType(i2, t2)) => {
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i1 == i2 && t1 == t2
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}
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(Error::StatementChangedRows(n1), Error::StatementChangedRows(n2)) => n1 == n2,
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#[cfg(feature = "functions")]
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(
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Error::InvalidFunctionParameterType(i1, t1),
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Error::InvalidFunctionParameterType(i2, t2),
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) => i1 == i2 && t1 == t2,
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#[cfg(feature = "vtab")]
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(
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Error::InvalidFilterParameterType(i1, t1),
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Error::InvalidFilterParameterType(i2, t2),
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) => i1 == i2 && t1 == t2,
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(Error::InvalidQuery, Error::InvalidQuery) => true,
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#[cfg(feature = "vtab")]
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(Error::ModuleError(s1), Error::ModuleError(s2)) => s1 == s2,
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#[cfg(feature = "functions")]
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(Error::UnwindingPanic, Error::UnwindingPanic) => true,
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(_, _) => false,
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}
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}
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}
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impl From<str::Utf8Error> for Error {
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fn from(err: str::Utf8Error) -> Error {
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Error::Utf8Error(err)
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}
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}
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impl From<::std::ffi::NulError> for Error {
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fn from(err: ::std::ffi::NulError) -> Error {
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Error::NulError(err)
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}
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}
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impl fmt::Display for Error {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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Error::SqliteFailure(ref err, None) => err.fmt(f),
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Error::SqliteFailure(_, Some(ref s)) => write!(f, "{}", s),
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Error::SqliteSingleThreadedMode => write!(
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f,
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"SQLite was compiled or configured for single-threaded use only"
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),
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Error::FromSqlConversionFailure(i, ref t, ref err) => write!(
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f,
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"Conversion error from type {} at index: {}, {}",
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t, i, err
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),
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Error::IntegralValueOutOfRange(col, val) => {
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write!(f, "Integer {} out of range at index {}", val, col)
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}
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Error::Utf8Error(ref err) => err.fmt(f),
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Error::NulError(ref err) => err.fmt(f),
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Error::InvalidParameterName(ref name) => write!(f, "Invalid parameter name: {}", name),
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Error::InvalidPath(ref p) => write!(f, "Invalid path: {}", p.to_string_lossy()),
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Error::ExecuteReturnedResults => {
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write!(f, "Execute returned results - did you mean to call query?")
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}
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Error::QueryReturnedNoRows => write!(f, "Query returned no rows"),
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Error::InvalidColumnIndex(i) => write!(f, "Invalid column index: {}", i),
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Error::InvalidColumnName(ref name) => write!(f, "Invalid column name: {}", name),
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Error::InvalidColumnType(i, ref t) => {
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write!(f, "Invalid column type {} at index: {}", t, i)
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}
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Error::StatementChangedRows(i) => write!(f, "Query changed {} rows", i),
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#[cfg(feature = "functions")]
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Error::InvalidFunctionParameterType(i, ref t) => {
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write!(f, "Invalid function parameter type {} at index {}", t, i)
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}
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#[cfg(feature = "vtab")]
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Error::InvalidFilterParameterType(i, ref t) => {
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write!(f, "Invalid filter parameter type {} at index {}", t, i)
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}
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#[cfg(feature = "functions")]
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Error::UserFunctionError(ref err) => err.fmt(f),
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Error::ToSqlConversionFailure(ref err) => err.fmt(f),
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Error::InvalidQuery => write!(f, "Query is not read-only"),
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#[cfg(feature = "vtab")]
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Error::ModuleError(ref desc) => write!(f, "{}", desc),
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#[cfg(feature = "functions")]
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Error::UnwindingPanic => write!(f, "unwinding panic"),
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}
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}
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}
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impl error::Error for Error {
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fn description(&self) -> &str {
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match *self {
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Error::SqliteFailure(ref err, None) => err.description(),
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Error::SqliteFailure(_, Some(ref s)) => s,
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Error::SqliteSingleThreadedMode => {
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"SQLite was compiled or configured for single-threaded use only"
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}
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Error::FromSqlConversionFailure(_, _, ref err) => err.description(),
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Error::IntegralValueOutOfRange(_, _) => "integral value out of range of requested type",
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Error::Utf8Error(ref err) => err.description(),
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Error::InvalidParameterName(_) => "invalid parameter name",
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Error::NulError(ref err) => err.description(),
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Error::InvalidPath(_) => "invalid path",
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Error::ExecuteReturnedResults => {
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"execute returned results - did you mean to call query?"
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}
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Error::QueryReturnedNoRows => "query returned no rows",
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Error::InvalidColumnIndex(_) => "invalid column index",
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Error::InvalidColumnName(_) => "invalid column name",
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Error::InvalidColumnType(_, _) => "invalid column type",
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Error::StatementChangedRows(_) => "query inserted zero or more than one row",
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#[cfg(feature = "functions")]
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Error::InvalidFunctionParameterType(_, _) => "invalid function parameter type",
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#[cfg(feature = "vtab")]
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Error::InvalidFilterParameterType(_, _) => "invalid filter parameter type",
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#[cfg(feature = "functions")]
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Error::UserFunctionError(ref err) => err.description(),
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Error::ToSqlConversionFailure(ref err) => err.description(),
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Error::InvalidQuery => "query is not read-only",
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#[cfg(feature = "vtab")]
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Error::ModuleError(ref desc) => desc,
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#[cfg(feature = "functions")]
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Error::UnwindingPanic => "unwinding panic",
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}
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}
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fn cause(&self) -> Option<&dyn error::Error> {
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match *self {
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Error::SqliteFailure(ref err, _) => Some(err),
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Error::Utf8Error(ref err) => Some(err),
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Error::NulError(ref err) => Some(err),
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Error::IntegralValueOutOfRange(_, _)
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| Error::SqliteSingleThreadedMode
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| Error::InvalidParameterName(_)
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| Error::ExecuteReturnedResults
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| Error::QueryReturnedNoRows
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| Error::InvalidColumnIndex(_)
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| Error::InvalidColumnName(_)
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| Error::InvalidColumnType(_, _)
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| Error::InvalidPath(_)
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| Error::StatementChangedRows(_)
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| Error::InvalidQuery => None,
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#[cfg(feature = "functions")]
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Error::InvalidFunctionParameterType(_, _) => None,
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#[cfg(feature = "vtab")]
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Error::InvalidFilterParameterType(_, _) => None,
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#[cfg(feature = "functions")]
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Error::UserFunctionError(ref err) => Some(&**err),
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Error::FromSqlConversionFailure(_, _, ref err)
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| Error::ToSqlConversionFailure(ref err) => Some(&**err),
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#[cfg(feature = "vtab")]
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Error::ModuleError(_) => None,
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#[cfg(feature = "functions")]
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Error::UnwindingPanic => None,
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}
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}
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}
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// These are public but not re-exported by lib.rs, so only visible within crate.
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pub fn error_from_sqlite_code(code: c_int, message: Option<String>) -> Error {
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Error::SqliteFailure(ffi::Error::new(code), message)
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}
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pub fn error_from_handle(db: *mut ffi::sqlite3, code: c_int) -> Error {
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let message = if db.is_null() {
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None
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} else {
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Some(unsafe { errmsg_to_string(ffi::sqlite3_errmsg(db)) })
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};
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error_from_sqlite_code(code, message)
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}
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macro_rules! check {
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($funcall:expr) => {{
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let rc = $funcall;
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if rc != crate::ffi::SQLITE_OK {
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Err(crate::error::error_from_sqlite_code(rc, None))?;
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}
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}};
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}
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