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Merge branch 'master' of https://github.com/jgallagher/rusqlite into blob

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This commit is contained in:
Gwenael Treguier 2015-12-05 11:11:23 +01:00
commit cef1d3285e
11 changed files with 697 additions and 76 deletions
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1
.travis.yml
View File

@ -1,4 +1,5 @@
language: rust
sudo: false
env:
global:

5
CONTRIBUTORS.md
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@ -5,3 +5,8 @@ rusqlite contributors (sorted alphabetically)
* [Marcus Klaas de Vries](https://github.com/marcusklaas)
* [gwenn](https://github.com/gwenn)
* [Jimmy Lu](https://github.com/Yuhta)
* [Huon Wilson](https://github.com/huonw)
* [Patrick Fernie](https://github.com/pfernie)
* [Steve Klabnik](https://github.com/steveklabnik)
* [krdln](https://github.com/krdln)
* [Ben Striegel](https://github.com/bstrie)

10
Cargo.toml
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@ -1,6 +1,6 @@
[package]
name = "rusqlite"
version = "0.2.0"
version = "0.4.0"
authors = ["John Gallagher <jgallagher@bignerdranch.com>"]
description = "Ergonomic wrapper for SQLite"
repository = "https://github.com/jgallagher/rusqlite"
@ -15,15 +15,21 @@ name = "rusqlite"
[features]
load_extension = ["libsqlite3-sys/load_extension"]
blob = []
trace = []
[dependencies]
time = "~0.1.0"
bitflags = "~0.1"
libc = "~0.1"
libc = "~0.2"
[dev-dependencies]
tempdir = "~0.3.4"
lazy_static = "~0.1"
[dependencies.libsqlite3-sys]
path = "libsqlite3-sys"
version = "0.2.0"
[[test]]
name = "config_log"
harness = false

28
Changelog.md
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@ -1,3 +1,31 @@
# Version UPCOMING (TBD)
* Adds `trace` feature that allows the use of SQLite's logging, tracing, and profiling hooks.
* Slight change to the closure types passed to `query_map` and `query_and_then`:
* Remove the `'static` requirement on the closure's output type.
* Give the closure a `&SqliteRow` instead of a `SqliteRow`.
* Add more documentation for failure modes of functions that return `SqliteResult`s.
# Version 0.4.0 (2015-11-03)
* Adds `Sized` bound to `FromSql` trait as required by RFC 1214.
# Version 0.3.1 (2015-09-22)
* Reset underlying SQLite statements as soon as possible after executing, as recommended by
http://www.sqlite.org/cvstrac/wiki?p=ScrollingCursor.
# Version 0.3.0 (2015-09-21)
* Removes `get_opt`. Use `get_checked` instead.
* Add `query_row_and_then` and `query_and_then` convenience functions. These are analogous to
`query_row` and `query_map` but allow functions that can fail by returning `Result`s.
* Relax uses of `P: AsRef<...>` from `&P` to `P`.
* Add additional error check for calling `execute` when `query` was intended.
* Improve debug formatting of `SqliteStatement` and `SqliteConnection`.
* Changes documentation of `get_checked` to correctly indicate that it returns errors (not panics)
when given invalid types or column indices.
# Version 0.2.0 (2015-07-26)
* Add `column_names()` to `SqliteStatement`.

2
README.md
View File

@ -91,7 +91,7 @@ There are other, less obvious things that may result in a panic as well, such as
`collect()` on a `SqliteRows` and then trying to use the collected rows.
Strongly consider using the method `query_map()` instead, if you can.
`query_map()` returns an iterator over rows-mapped-to-some-`'static`-type. This
`query_map()` returns an iterator over rows-mapped-to-some-type. This
iterator does not have any of the above issues with panics due to attempting to
access stale rows.

2
libsqlite3-sys/Cargo.toml
View File

@ -15,4 +15,4 @@ load_extension = []
pkg-config = "~0.3"
[dependencies]
libc = "~0.1"
libc = "~0.2"

2
libsqlite3-sys/src/lib.rs
View File

@ -92,3 +92,5 @@ pub fn code_to_str(code: c_int) -> &'static str {
_ => "Unknown error code",
}
}
pub const SQLITE_CONFIG_LOG : c_int = 16;

518
src/lib.rs
View File

@ -53,12 +53,14 @@
extern crate libc;
extern crate libsqlite3_sys as ffi;
#[macro_use] extern crate bitflags;
#[cfg(test)] #[macro_use] extern crate lazy_static;
use std::default::Default;
use std::convert;
use std::mem;
use std::ptr;
use std::fmt;
use std::path::{Path};
use std::path::{Path,PathBuf};
use std::error;
use std::rc::{Rc};
use std::cell::{RefCell, Cell};
@ -80,6 +82,7 @@ pub mod types;
mod transaction;
#[cfg(feature = "load_extension")] mod load_extension_guard;
#[cfg(feature = "blob")] pub mod blob;
#[cfg(feature = "trace")] pub mod trace;
/// A typedef of the result returned by many methods.
pub type SqliteResult<T> = Result<T, SqliteError>;
@ -91,7 +94,7 @@ unsafe fn errmsg_to_string(errmsg: *const c_char) -> String {
}
/// Encompasses an error result from a call to the SQLite C API.
#[derive(Debug)]
#[derive(Debug, PartialEq)]
pub struct SqliteError {
/// The error code returned by a SQLite C API call. See [SQLite Result
/// Codes](http://www.sqlite.org/rescode.html) for details.
@ -128,30 +131,22 @@ impl SqliteError {
fn str_to_cstring(s: &str) -> SqliteResult<CString> {
CString::new(s).map_err(|_| SqliteError{
code: ffi::SQLITE_MISUSE,
message: "Could not convert path to C-combatible string".to_string()
message: format!("Could not convert string {} to C-combatible string", s),
})
}
fn path_to_cstring(p: &Path) -> SqliteResult<CString> {
let s = try!(p.to_str().ok_or(SqliteError{
code: ffi::SQLITE_MISUSE,
message: "Could not convert path to UTF-8 string".to_string()
message: format!("Could not convert path {} to UTF-8 string", p.to_string_lossy()),
}));
str_to_cstring(s)
}
/// A connection to a SQLite database.
///
/// ## Warning
///
/// Note that despite the fact that most `SqliteConnection` methods take an immutable reference to
/// `self`, `SqliteConnection` is NOT threadsafe, and using it from multiple threads may result in
/// runtime panics or data races. The SQLite connection handle has at least two pieces of internal
/// state (the last insertion ID and the last error message) that rusqlite uses, but wrapping these
/// APIs in a safe way from Rust would be too restrictive (for example, you would not be able to
/// prepare multiple statements at the same time).
pub struct SqliteConnection {
db: RefCell<InnerSqliteConnection>,
path: Option<PathBuf>,
}
unsafe impl Send for SqliteConnection {}
@ -161,12 +156,21 @@ impl SqliteConnection {
///
/// `SqliteConnection::open(path)` is equivalent to `SqliteConnection::open_with_flags(path,
/// SQLITE_OPEN_READ_WRITE | SQLITE_OPEN_CREATE)`.
pub fn open<P: AsRef<Path>>(path: &P) -> SqliteResult<SqliteConnection> {
///
/// # Failure
///
/// Will return `Err` if `path` cannot be converted to a C-compatible string or if the
/// underlying SQLite open call fails.
pub fn open<P: AsRef<Path>>(path: P) -> SqliteResult<SqliteConnection> {
let flags = Default::default();
SqliteConnection::open_with_flags(path, flags)
}
/// Open a new connection to an in-memory SQLite database.
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite open call fails.
pub fn open_in_memory() -> SqliteResult<SqliteConnection> {
let flags = Default::default();
SqliteConnection::open_in_memory_with_flags(flags)
@ -176,11 +180,16 @@ impl SqliteConnection {
///
/// Database Connection](http://www.sqlite.org/c3ref/open.html) for a description of valid
/// flag combinations.
pub fn open_with_flags<P: AsRef<Path>>(path: &P, flags: SqliteOpenFlags)
///
/// # Failure
///
/// Will return `Err` if `path` cannot be converted to a C-compatible string or if the
/// underlying SQLite open call fails.
pub fn open_with_flags<P: AsRef<Path>>(path: P, flags: SqliteOpenFlags)
-> SqliteResult<SqliteConnection> {
let c_path = try!(path_to_cstring(path.as_ref()));
InnerSqliteConnection::open_with_flags(&c_path, flags).map(|db| {
SqliteConnection{ db: RefCell::new(db) }
SqliteConnection{ db: RefCell::new(db), path: Some(path.as_ref().to_path_buf()) }
})
}
@ -188,10 +197,14 @@ impl SqliteConnection {
///
/// Database Connection](http://www.sqlite.org/c3ref/open.html) for a description of valid
/// flag combinations.
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite open call fails.
pub fn open_in_memory_with_flags(flags: SqliteOpenFlags) -> SqliteResult<SqliteConnection> {
let c_memory = try!(str_to_cstring(":memory:"));
InnerSqliteConnection::open_with_flags(&c_memory, flags).map(|db| {
SqliteConnection{ db: RefCell::new(db) }
SqliteConnection{ db: RefCell::new(db), path: None }
})
}
@ -215,6 +228,10 @@ impl SqliteConnection {
/// tx.commit()
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
pub fn transaction<'a>(&'a self) -> SqliteResult<SqliteTransaction<'a>> {
SqliteTransaction::new(self, SqliteTransactionDeferred)
}
@ -222,6 +239,10 @@ impl SqliteConnection {
/// Begin a new transaction with a specified behavior.
///
/// See `transaction`.
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
pub fn transaction_with_behavior<'a>(&'a self, behavior: SqliteTransactionBehavior)
-> SqliteResult<SqliteTransaction<'a>> {
SqliteTransaction::new(self, behavior)
@ -242,6 +263,11 @@ impl SqliteConnection {
/// COMMIT;")
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if `sql` cannot be converted to a C-compatible string or if the
/// underlying SQLite call fails.
pub fn execute_batch(&self, sql: &str) -> SqliteResult<()> {
self.db.borrow_mut().execute_batch(sql)
}
@ -262,6 +288,11 @@ impl SqliteConnection {
/// }
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if `sql` cannot be converted to a C-compatible string or if the
/// underlying SQLite call fails.
pub fn execute(&self, sql: &str, params: &[&ToSql]) -> SqliteResult<c_int> {
self.prepare(sql).and_then(|mut stmt| stmt.execute(params))
}
@ -288,6 +319,11 @@ impl SqliteConnection {
/// ```
///
/// If the query returns more than one row, all rows except the first are ignored.
///
/// # Failure
///
/// Will return `Err` if `sql` cannot be converted to a C-compatible string or if the
/// underlying SQLite call fails.
pub fn query_row<T, F>(&self, sql: &str, params: &[&ToSql], f: F) -> SqliteResult<T>
where F: FnOnce(SqliteRow) -> T {
let mut stmt = try!(self.prepare(sql));
@ -302,6 +338,42 @@ impl SqliteConnection {
}
}
/// Convenience method to execute a query that is expected to return a single row,
/// and execute a mapping via `f` on that returned row with the possibility of failure.
/// The `Result` type of `f` must implement `std::convert::From<SqliteError>`.
///
/// ## Example
///
/// ```rust,no_run
/// # use rusqlite::{SqliteResult,SqliteConnection};
/// fn preferred_locale(conn: &SqliteConnection) -> SqliteResult<String> {
/// conn.query_row_and_then("SELECT value FROM preferences WHERE name='locale'", &[], |row| {
/// row.get_checked(0)
/// })
/// }
/// ```
///
/// If the query returns more than one row, all rows except the first are ignored.
///
/// # Failure
///
/// Will return `Err` if `sql` cannot be converted to a C-compatible string or if the
/// underlying SQLite call fails.
pub fn query_row_and_then<T, E, F>(&self, sql: &str, params: &[&ToSql], f: F) -> Result<T, E>
where F: FnOnce(SqliteRow) -> Result<T, E>,
E: convert::From<SqliteError> {
let mut stmt = try!(self.prepare(sql));
let mut rows = try!(stmt.query(params));
match rows.next() {
Some(row) => row.map_err(E::from).and_then(f),
None => Err(E::from(SqliteError{
code: ffi::SQLITE_NOTICE,
message: "Query did not return a row".to_string(),
}))
}
}
/// Convenience method to execute a query that is expected to return a single row.
///
/// ## Example
@ -339,6 +411,11 @@ impl SqliteConnection {
/// Ok(())
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if `sql` cannot be converted to a C-compatible string or if the
/// underlying SQLite call fails.
pub fn prepare<'a>(&'a self, sql: &str) -> SqliteResult<SqliteStatement<'a>> {
self.db.borrow_mut().prepare(self, sql)
}
@ -347,6 +424,10 @@ impl SqliteConnection {
///
/// This is functionally equivalent to the `Drop` implementation for `SqliteConnection` except
/// that it returns any error encountered to the caller.
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
pub fn close(self) -> SqliteResult<()> {
let mut db = self.db.borrow_mut();
db.close()
@ -366,6 +447,10 @@ impl SqliteConnection {
/// conn.load_extension_disable()
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
#[cfg(feature = "load_extension")]
pub fn load_extension_enable(&self) -> SqliteResult<()> {
self.db.borrow_mut().enable_load_extension(1)
@ -374,6 +459,10 @@ impl SqliteConnection {
/// Disable loading of SQLite extensions.
///
/// See `load_extension_enable` for an example.
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
#[cfg(feature = "load_extension")]
pub fn load_extension_disable(&self) -> SqliteResult<()> {
self.db.borrow_mut().enable_load_extension(0)
@ -394,10 +483,14 @@ impl SqliteConnection {
/// fn load_my_extension(conn: &SqliteConnection) -> SqliteResult<()> {
/// let _guard = try!(SqliteLoadExtensionGuard::new(conn));
///
/// conn.load_extension(Path::new("my_sqlite_extension"), None)
/// conn.load_extension("my_sqlite_extension", None)
/// }
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
#[cfg(feature = "load_extension")]
pub fn load_extension<P: AsRef<Path>>(&self, dylib_path: &P, entry_point: Option<&str>) -> SqliteResult<()> {
pub fn load_extension<P: AsRef<Path>>(&self, dylib_path: P, entry_point: Option<&str>) -> SqliteResult<()> {
self.db.borrow_mut().load_extension(dylib_path, entry_point)
}
@ -412,7 +505,9 @@ impl SqliteConnection {
impl fmt::Debug for SqliteConnection {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "SqliteConnection()")
f.debug_struct("SqliteConnection")
.field("path", &self.path)
.finish()
}
}
@ -543,6 +638,12 @@ impl InnerSqliteConnection {
fn prepare<'a>(&mut self,
conn: &'a SqliteConnection,
sql: &str) -> SqliteResult<SqliteStatement<'a>> {
if sql.len() >= ::std::i32::MAX as usize {
return Err(SqliteError {
code: ffi::SQLITE_TOOBIG,
message: "statement too long".to_string()
});
}
let mut c_stmt: *mut ffi::sqlite3_stmt = unsafe { mem::uninitialized() };
let c_sql = try!(str_to_cstring(sql));
let r = unsafe {
@ -572,16 +673,18 @@ pub struct SqliteStatement<'conn> {
conn: &'conn SqliteConnection,
stmt: *mut ffi::sqlite3_stmt,
needs_reset: bool,
column_count: c_int,
}
impl<'conn> SqliteStatement<'conn> {
fn new(conn: &SqliteConnection, stmt: *mut ffi::sqlite3_stmt) -> SqliteStatement {
SqliteStatement{ conn: conn, stmt: stmt, needs_reset: false }
SqliteStatement{ conn: conn, stmt: stmt, needs_reset: false,
column_count: unsafe { ffi::sqlite3_column_count(stmt) }}
}
/// Get all the column names in the result set of the prepared statement.
pub fn column_names(&self) -> Vec<&str> {
let n = unsafe { ffi::sqlite3_column_count(self.stmt) };
let n = self.column_count;
let mut cols = Vec::with_capacity(n as usize);
for i in 0..n {
let slice = unsafe {
@ -611,23 +714,26 @@ impl<'conn> SqliteStatement<'conn> {
/// Ok(())
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if binding parameters fails, the executed statement returns rows (in
/// which case `query` should be used instead), or the underling SQLite call fails.
pub fn execute(&mut self, params: &[&ToSql]) -> SqliteResult<c_int> {
self.reset_if_needed();
unsafe {
assert!(params.len() as c_int == ffi::sqlite3_bind_parameter_count(self.stmt),
"incorrect number of parameters to execute(): expected {}, got {}",
ffi::sqlite3_bind_parameter_count(self.stmt),
params.len());
try!(self.bind_parameters(params));
for (i, p) in params.iter().enumerate() {
try!(self.conn.decode_result(p.bind_parameter(self.stmt, (i + 1) as c_int)));
}
self.needs_reset = true;
let r = ffi::sqlite3_step(self.stmt);
ffi::sqlite3_reset(self.stmt);
match r {
ffi::SQLITE_DONE => Ok(self.conn.changes()),
ffi::SQLITE_DONE => {
if self.column_count != 0 {
Err(SqliteError{ code: ffi::SQLITE_MISUSE,
message: "Unexpected column count - did you mean to call query?".to_string() })
} else {
Ok(self.conn.changes())
}
},
ffi::SQLITE_ROW => Err(SqliteError{ code: r,
message: "Unexpected row result - did you mean to call query?".to_string() }),
_ => Err(self.conn.decode_result(r).unwrap_err()),
@ -654,6 +760,10 @@ impl<'conn> SqliteStatement<'conn> {
/// Ok(names)
/// }
/// ```
///
/// # Failure
///
/// Will return `Err` if binding parameters fails.
pub fn query<'a>(&'a mut self, params: &[&ToSql]) -> SqliteResult<SqliteRows<'a>> {
self.reset_if_needed();
@ -661,6 +771,7 @@ impl<'conn> SqliteStatement<'conn> {
try!(self.bind_parameters(params));
}
self.needs_reset = true;
Ok(SqliteRows::new(self))
}
@ -669,10 +780,13 @@ impl<'conn> SqliteStatement<'conn> {
///
/// Unlike the iterator produced by `query`, the returned iterator does not expose the possibility
/// for accessing stale rows.
///
/// # Failure
///
/// Will return `Err` if binding parameters fails.
pub fn query_map<'a, T, F>(&'a mut self, params: &[&ToSql], f: F)
-> SqliteResult<MappedRows<'a, F>>
where T: 'static,
F: FnMut(SqliteRow) -> T {
where F: FnMut(&SqliteRow) -> T {
let row_iter = try!(self.query(params));
Ok(MappedRows{
@ -681,10 +795,36 @@ impl<'conn> SqliteStatement<'conn> {
})
}
/// Executes the prepared statement and maps a function over the resulting
/// rows, where the function returns a `Result` with `Error` type implementing
/// `std::convert::From<SqliteError>` (so errors can be unified).
///
/// Unlike the iterator produced by `query`, the returned iterator does not expose the possibility
/// for accessing stale rows.
///
/// # Failure
///
/// Will return `Err` if binding parameters fails.
pub fn query_and_then<'a, T, E, F>(&'a mut self, params: &[&ToSql], f: F)
-> SqliteResult<AndThenRows<'a, F>>
where E: convert::From<SqliteError>,
F: FnMut(&SqliteRow) -> Result<T, E> {
let row_iter = try!(self.query(params));
Ok(AndThenRows{
rows: row_iter,
map: f,
})
}
/// Consumes the statement.
///
/// Functionally equivalent to the `Drop` implementation, but allows callers to see any errors
/// that occur.
///
/// # Failure
///
/// Will return `Err` if the underlying SQLite call fails.
pub fn finalize(mut self) -> SqliteResult<()> {
self.finalize_()
}
@ -699,8 +839,6 @@ impl<'conn> SqliteStatement<'conn> {
try!(self.conn.decode_result(p.bind_parameter(self.stmt, (i + 1) as c_int)));
}
self.needs_reset = true;
Ok(())
}
@ -720,7 +858,15 @@ impl<'conn> SqliteStatement<'conn> {
impl<'conn> fmt::Debug for SqliteStatement<'conn> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Statement( conn: {:?}, stmt: {:?} )", self.conn, self.stmt)
let sql = unsafe {
let c_slice = CStr::from_ptr(ffi::sqlite3_sql(self.stmt)).to_bytes();
str::from_utf8(c_slice)
};
f.debug_struct("SqliteStatement")
.field("conn", self.conn)
.field("stmt", &self.stmt)
.field("sql", &sql)
.finish()
}
}
@ -738,12 +884,30 @@ pub struct MappedRows<'stmt, F> {
}
impl<'stmt, T, F> Iterator for MappedRows<'stmt, F>
where T: 'static,
F: FnMut(SqliteRow) -> T {
where F: FnMut(&SqliteRow) -> T {
type Item = SqliteResult<T>;
fn next(&mut self) -> Option<SqliteResult<T>> {
self.rows.next().map(|row_result| row_result.map(|row| (self.map)(row)))
self.rows.next().map(|row_result| row_result.map(|row| (self.map)(&row)))
}
}
/// An iterator over the mapped resulting rows of a query, with an Error type
/// unifying with SqliteError.
pub struct AndThenRows<'stmt, F> {
rows: SqliteRows<'stmt>,
map: F,
}
impl<'stmt, T, E, F> Iterator for AndThenRows<'stmt, F>
where E: convert::From<SqliteError>,
F: FnMut(&SqliteRow) -> Result<T, E> {
type Item = Result<T, E>;
fn next(&mut self) -> Option<Self::Item> {
self.rows.next().map(|row_result| row_result
.map_err(E::from)
.and_then(|row| (self.map)(&row)))
}
}
@ -857,7 +1021,7 @@ impl<'stmt> SqliteRow<'stmt> {
/// Panics if `idx` is outside the range of columns in the returned query or if this row
/// is stale.
pub fn get<T: FromSql>(&self, idx: c_int) -> T {
self.get_opt(idx).unwrap()
self.get_checked(idx).unwrap()
}
/// Get the value of a particular column of the result row.
@ -867,15 +1031,21 @@ impl<'stmt> SqliteRow<'stmt> {
/// Returns a `SQLITE_MISMATCH`-coded `SqliteError` if the underlying SQLite column
/// type is not a valid type as a source for `T`.
///
/// Panics if `idx` is outside the range of columns in the returned query or if this row
/// is stale.
/// Returns a `SQLITE_MISUSE`-coded `SqliteError` if `idx` is outside the valid column range
/// for this row or if this row is stale.
pub fn get_checked<T: FromSql>(&self, idx: c_int) -> SqliteResult<T> {
let valid_column_type = unsafe {
T::column_has_valid_sqlite_type(self.stmt.stmt, idx)
};
if self.row_idx != self.current_row.get() {
return Err(SqliteError{ code: ffi::SQLITE_MISUSE,
message: "Cannot get values from a row after advancing to next row".to_string() });
}
unsafe {
if idx < 0 || idx >= self.stmt.column_count {
return Err(SqliteError{ code: ffi::SQLITE_MISUSE,
message: "Invalid column index".to_string() });
}
if valid_column_type {
Ok(self.get(idx))
if T::column_has_valid_sqlite_type(self.stmt.stmt, idx) {
FromSql::column_result(self.stmt.stmt, idx)
} else {
Err(SqliteError{
code: ffi::SQLITE_MISMATCH,
@ -883,25 +1053,6 @@ impl<'stmt> SqliteRow<'stmt> {
})
}
}
/// Attempt to get the value of a particular column of the result row.
///
/// ## Failure
///
/// Returns a `SQLITE_MISUSE`-coded `SqliteError` if `idx` is outside the valid column range
/// for this row or if this row is stale.
pub fn get_opt<T: FromSql>(&self, idx: c_int) -> SqliteResult<T> {
if self.row_idx != self.current_row.get() {
return Err(SqliteError{ code: ffi::SQLITE_MISUSE,
message: "Cannot get values from a row after advancing to next row".to_string() });
}
unsafe {
if idx < 0 || idx >= ffi::sqlite3_column_count(self.stmt.stmt) {
return Err(SqliteError{ code: ffi::SQLITE_MISUSE,
message: "Invalid column index".to_string() });
}
FromSql::column_result(self.stmt.stmt, idx)
}
}
}
@ -909,8 +1060,10 @@ impl<'stmt> SqliteRow<'stmt> {
mod test {
extern crate libsqlite3_sys as ffi;
extern crate tempdir;
use super::*;
pub use super::*;
use self::tempdir::TempDir;
pub use std::error::Error as StdError;
pub use std::fmt;
// this function is never called, but is still type checked; in
// particular, calls with specific instantiations will require
@ -920,7 +1073,7 @@ mod test {
ensure_send::<SqliteConnection>();
}
fn checked_memory_handle() -> SqliteConnection {
pub fn checked_memory_handle() -> SqliteConnection {
SqliteConnection::open_in_memory().unwrap()
}
@ -994,6 +1147,14 @@ mod test {
assert_eq!(3i32, db.query_row("SELECT SUM(x) FROM foo", &[], |r| r.get(0)).unwrap());
}
#[test]
fn test_execute_select() {
let db = checked_memory_handle();
let err = db.execute("SELECT 1 WHERE 1 < ?", &[&1i32]).unwrap_err();
assert!(err.code == ffi::SQLITE_MISUSE);
assert!(err.message == "Unexpected column count - did you mean to call query?");
}
#[test]
fn test_prepare_column_names() {
let db = checked_memory_handle();
@ -1122,7 +1283,7 @@ mod test {
assert_eq!(2i32, second.get(0));
let result = first.get_opt::<i32>(0);
let result = first.get_checked::<i32>(0);
assert!(result.unwrap_err().message.contains("advancing to next row"));
}
@ -1140,4 +1301,217 @@ mod test {
}
assert_eq!(db.last_insert_rowid(), 10);
}
#[test]
fn test_statement_debugging() {
let db = checked_memory_handle();
let query = "SELECT 12345";
let stmt = db.prepare(query).unwrap();
assert!(format!("{:?}", stmt).contains(query));
}
mod query_and_then_tests {
extern crate libsqlite3_sys as ffi;
use super::*;
#[derive(Debug, PartialEq)]
enum CustomError {
SomeError,
Sqlite(SqliteError),
}
impl fmt::Display for CustomError {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match *self {
CustomError::SomeError => write!(f, "{}", self.description()),
CustomError::Sqlite(ref se) => write!(f, "{}: {}", self.description(), se),
}
}
}
impl StdError for CustomError {
fn description(&self) -> &str { "my custom error" }
fn cause(&self) -> Option<&StdError> {
match *self {
CustomError::SomeError => None,
CustomError::Sqlite(ref se) => Some(se),
}
}
}
impl From<SqliteError> for CustomError {
fn from(se: SqliteError) -> CustomError {
CustomError::Sqlite(se)
}
}
type CustomResult<T> = Result<T, CustomError>;
#[test]
fn test_query_and_then() {
let db = checked_memory_handle();
let sql = "BEGIN;
CREATE TABLE foo(x INTEGER, y TEXT);
INSERT INTO foo VALUES(4, \"hello\");
INSERT INTO foo VALUES(3, \", \");
INSERT INTO foo VALUES(2, \"world\");
INSERT INTO foo VALUES(1, \"!\");
END;";
db.execute_batch(sql).unwrap();
let mut query = db.prepare("SELECT x, y FROM foo ORDER BY x DESC").unwrap();
let results: SqliteResult<Vec<String>> = query
.query_and_then(&[], |row| row.get_checked(1))
.unwrap()
.collect();
assert_eq!(results.unwrap().concat(), "hello, world!");
}
#[test]
fn test_query_and_then_fails() {
let db = checked_memory_handle();
let sql = "BEGIN;
CREATE TABLE foo(x INTEGER, y TEXT);
INSERT INTO foo VALUES(4, \"hello\");
INSERT INTO foo VALUES(3, \", \");
INSERT INTO foo VALUES(2, \"world\");
INSERT INTO foo VALUES(1, \"!\");
END;";
db.execute_batch(sql).unwrap();
let mut query = db.prepare("SELECT x, y FROM foo ORDER BY x DESC").unwrap();
let bad_type: SqliteResult<Vec<f64>> = query
.query_and_then(&[], |row| row.get_checked(1))
.unwrap()
.collect();
assert_eq!(bad_type, Err(SqliteError{
code: ffi::SQLITE_MISMATCH,
message: "Invalid column type".to_owned(),
}));
let bad_idx: SqliteResult<Vec<String>> = query
.query_and_then(&[], |row| row.get_checked(3))
.unwrap()
.collect();
assert_eq!(bad_idx, Err(SqliteError{
code: ffi::SQLITE_MISUSE,
message: "Invalid column index".to_owned(),
}));
}
#[test]
fn test_query_and_then_custom_error() {
let db = checked_memory_handle();
let sql = "BEGIN;
CREATE TABLE foo(x INTEGER, y TEXT);
INSERT INTO foo VALUES(4, \"hello\");
INSERT INTO foo VALUES(3, \", \");
INSERT INTO foo VALUES(2, \"world\");
INSERT INTO foo VALUES(1, \"!\");
END;";
db.execute_batch(sql).unwrap();
let mut query = db.prepare("SELECT x, y FROM foo ORDER BY x DESC").unwrap();
let results: CustomResult<Vec<String>> = query
.query_and_then(&[], |row| row.get_checked(1).map_err(CustomError::Sqlite))
.unwrap()
.collect();
assert_eq!(results.unwrap().concat(), "hello, world!");
}
#[test]
fn test_query_and_then_custom_error_fails() {
let db = checked_memory_handle();
let sql = "BEGIN;
CREATE TABLE foo(x INTEGER, y TEXT);
INSERT INTO foo VALUES(4, \"hello\");
INSERT INTO foo VALUES(3, \", \");
INSERT INTO foo VALUES(2, \"world\");
INSERT INTO foo VALUES(1, \"!\");
END;";
db.execute_batch(sql).unwrap();
let mut query = db.prepare("SELECT x, y FROM foo ORDER BY x DESC").unwrap();
let bad_type: CustomResult<Vec<f64>> = query
.query_and_then(&[], |row| row.get_checked(1).map_err(CustomError::Sqlite))
.unwrap()
.collect();
assert_eq!(bad_type, Err(CustomError::Sqlite(SqliteError{
code: ffi::SQLITE_MISMATCH,
message: "Invalid column type".to_owned(),
})));
let bad_idx: CustomResult<Vec<String>> = query
.query_and_then(&[], |row| row.get_checked(3).map_err(CustomError::Sqlite))
.unwrap()
.collect();
assert_eq!(bad_idx, Err(CustomError::Sqlite(SqliteError{
code: ffi::SQLITE_MISUSE,
message: "Invalid column index".to_owned(),
})));
let non_sqlite_err: CustomResult<Vec<String>> = query
.query_and_then(&[], |_| Err(CustomError::SomeError))
.unwrap()
.collect();
assert_eq!(non_sqlite_err, Err(CustomError::SomeError));
}
#[test]
fn test_query_row_and_then_custom_error() {
let db = checked_memory_handle();
let sql = "BEGIN;
CREATE TABLE foo(x INTEGER, y TEXT);
INSERT INTO foo VALUES(4, \"hello\");
END;";
db.execute_batch(sql).unwrap();
let query = "SELECT x, y FROM foo ORDER BY x DESC";
let results: CustomResult<String> = db
.query_row_and_then(query, &[], |row| row.get_checked(1).map_err(CustomError::Sqlite));
assert_eq!(results.unwrap(), "hello");
}
#[test]
fn test_query_row_and_then_custom_error_fails() {
let db = checked_memory_handle();
let sql = "BEGIN;
CREATE TABLE foo(x INTEGER, y TEXT);
INSERT INTO foo VALUES(4, \"hello\");
END;";
db.execute_batch(sql).unwrap();
let query = "SELECT x, y FROM foo ORDER BY x DESC";
let bad_type: CustomResult<f64> = db
.query_row_and_then(query, &[], |row| row.get_checked(1).map_err(CustomError::Sqlite));
assert_eq!(bad_type, Err(CustomError::Sqlite(SqliteError{
code: ffi::SQLITE_MISMATCH,
message: "Invalid column type".to_owned(),
})));
let bad_idx: CustomResult<String> = db
.query_row_and_then(query, &[], |row| row.get_checked(3).map_err(CustomError::Sqlite));
assert_eq!(bad_idx, Err(CustomError::Sqlite(SqliteError{
code: ffi::SQLITE_MISUSE,
message: "Invalid column index".to_owned(),
})));
let non_sqlite_err: CustomResult<String> = db
.query_row_and_then(query, &[], |_| Err(CustomError::SomeError));
assert_eq!(non_sqlite_err, Err(CustomError::SomeError));
}
}
}

162
src/trace.rs Normal file
View File

@ -0,0 +1,162 @@
//! Tracing and profiling functions. Error and warning log.
use libc::{c_char, c_int, c_void};
use std::ffi::{CStr, CString};
use std::mem;
use std::ptr;
use std::str;
use std::time::Duration;
use super::ffi;
use {SqliteError, SqliteResult, SqliteConnection};
/// Set up the process-wide SQLite error logging callback.
/// This function is marked unsafe for two reasons:
///
/// * The function is not threadsafe. No other SQLite calls may be made while
/// `config_log` is running, and multiple threads may not call `config_log`
/// simultaneously.
/// * The provided `callback` itself function has two requirements:
/// * It must not invoke any SQLite calls.
/// * It must be threadsafe if SQLite is used in a multithreaded way.
///
/// cf [The Error And Warning Log](http://sqlite.org/errlog.html).
pub unsafe fn config_log(callback: Option<fn(c_int, &str)>) -> SqliteResult<()> {
extern "C" fn log_callback(p_arg: *mut c_void, err: c_int, msg: *const c_char) {
let c_slice = unsafe { CStr::from_ptr(msg).to_bytes() };
let callback: fn(c_int, &str) = unsafe { mem::transmute(p_arg) };
if let Ok(s) = str::from_utf8(c_slice) {
callback(err, s);
}
}
let rc = match callback {
Some(f) => {
let p_arg: *mut c_void = mem::transmute(f);
ffi::sqlite3_config(ffi::SQLITE_CONFIG_LOG, Some(log_callback), p_arg)
},
None => {
let nullptr: *mut c_void = ptr::null_mut();
ffi::sqlite3_config(ffi::SQLITE_CONFIG_LOG, nullptr, nullptr)
}
};
if rc != ffi::SQLITE_OK {
return Err(SqliteError{ code: rc, message: "sqlite3_config(SQLITE_CONFIG_LOG, ...)".to_string() });
}
Ok(())
}
/// Write a message into the error log established by `config_log`.
pub fn log(err_code: c_int, msg: &str) {
let msg = CString::new(msg).expect("SQLite log messages cannot contain embedded zeroes");
unsafe {
ffi::sqlite3_log(err_code, msg.as_ptr());
}
}
impl SqliteConnection {
/// Register or clear a callback function that can be used for tracing the execution of SQL statements.
///
/// Prepared statement placeholders are replaced/logged with their assigned values.
/// There can only be a single tracer defined for each database connection.
/// Setting a new tracer clears the old one.
pub fn trace(&mut self, trace_fn: Option<fn(&str)>) {
extern "C" fn trace_callback (p_arg: *mut c_void, z_sql: *const c_char) {
let trace_fn: fn(&str) = unsafe { mem::transmute(p_arg) };
let c_slice = unsafe { CStr::from_ptr(z_sql).to_bytes() };
if let Ok(s) = str::from_utf8(c_slice) {
trace_fn(s);
}
}
let c = self.db.borrow_mut();
match trace_fn {
Some(f) => unsafe { ffi::sqlite3_trace(c.db(), Some(trace_callback), mem::transmute(f)); },
None => unsafe { ffi::sqlite3_trace(c.db(), None, ptr::null_mut()); },
}
}
/// Register or clear a callback function that can be used for profiling the execution of SQL statements.
///
/// There can only be a single profiler defined for each database connection.
/// Setting a new profiler clears the old one.
pub fn profile(&mut self, profile_fn: Option<fn(&str, Duration)>) {
extern "C" fn profile_callback(p_arg: *mut c_void, z_sql: *const c_char, nanoseconds: u64) {
let profile_fn: fn(&str, Duration) = unsafe { mem::transmute(p_arg) };
let c_slice = unsafe { CStr::from_ptr(z_sql).to_bytes() };
if let Ok(s) = str::from_utf8(c_slice) {
const NANOS_PER_SEC: u64 = 1_000_000_000;
let duration = Duration::new(nanoseconds / NANOS_PER_SEC,
(nanoseconds % NANOS_PER_SEC) as u32);
profile_fn(s, duration);
}
}
let c = self.db.borrow_mut();
match profile_fn {
Some(f) => unsafe { ffi::sqlite3_profile(c.db(), Some(profile_callback), mem::transmute(f)) },
None => unsafe { ffi::sqlite3_profile(c.db(), None, ptr::null_mut()) },
};
}
}
#[cfg(test)]
mod test {
use std::sync::Mutex;
use std::time::Duration;
use SqliteConnection;
#[test]
fn test_trace() {
lazy_static! {
static ref TRACED_STMTS: Mutex<Vec<String>> = Mutex::new(Vec::new());
}
fn tracer(s: &str) {
let mut traced_stmts = TRACED_STMTS.lock().unwrap();
traced_stmts.push(s.to_owned());
}
let mut db = SqliteConnection::open_in_memory().unwrap();
db.trace(Some(tracer));
{
let _ = db.query_row("SELECT ?", &[&1i32], |_| {});
let _ = db.query_row("SELECT ?", &[&"hello"], |_| {});
}
db.trace(None);
{
let _ = db.query_row("SELECT ?", &[&2i32], |_| {});
let _ = db.query_row("SELECT ?", &[&"goodbye"], |_| {});
}
let traced_stmts = TRACED_STMTS.lock().unwrap();
assert_eq!(traced_stmts.len(), 2);
assert_eq!(traced_stmts[0], "SELECT 1");
assert_eq!(traced_stmts[1], "SELECT 'hello'");
}
#[test]
fn test_profile() {
lazy_static! {
static ref PROFILED: Mutex<Vec<(String, Duration)>> = Mutex::new(Vec::new());
}
fn profiler(s: &str, d: Duration) {
let mut profiled = PROFILED.lock().unwrap();
profiled.push((s.to_owned(), d));
}
let mut db = SqliteConnection::open_in_memory().unwrap();
db.profile(Some(profiler));
db.execute_batch("PRAGMA application_id = 1").unwrap();
db.profile(None);
db.execute_batch("PRAGMA application_id = 2").unwrap();
let profiled = PROFILED.lock().unwrap();
assert_eq!(profiled.len(), 1);
assert_eq!(profiled[0].0, "PRAGMA application_id = 1");
}
}

11
src/types.rs
View File

@ -74,7 +74,7 @@ pub trait ToSql {
}
/// A trait for types that can be created from a SQLite value.
pub trait FromSql {
pub trait FromSql: Sized {
unsafe fn column_result(stmt: *mut sqlite3_stmt, col: c_int) -> SqliteResult<Self>;
/// FromSql types can implement this method and use sqlite3_column_type to check that
@ -102,8 +102,12 @@ raw_to_impl!(c_double, sqlite3_bind_double);
impl<'a> ToSql for &'a str {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
let length = self.len();
if length > ::std::i32::MAX as usize {
return ffi::SQLITE_TOOBIG;
}
match str_to_cstring(self) {
Ok(c_str) => ffi::sqlite3_bind_text(stmt, col, c_str.as_ptr(), -1,
Ok(c_str) => ffi::sqlite3_bind_text(stmt, col, c_str.as_ptr(), length as c_int,
ffi::SQLITE_TRANSIENT()),
Err(_) => ffi::SQLITE_MISUSE,
}
@ -118,6 +122,9 @@ impl ToSql for String {
impl<'a> ToSql for &'a [u8] {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
if self.len() > ::std::i32::MAX as usize {
return ffi::SQLITE_TOOBIG;
}
ffi::sqlite3_bind_blob(
stmt, col, mem::transmute(self.as_ptr()), self.len() as c_int, ffi::SQLITE_TRANSIENT())
}

36
tests/config_log.rs Normal file
View File

@ -0,0 +1,36 @@
//! This file contains unit tests for rusqlite::trace::config_log. This function affects
//! SQLite process-wide and so is not safe to run as a normal #[test] in the library.
#[macro_use] extern crate lazy_static;
extern crate libc;
extern crate rusqlite;
#[cfg(feature = "trace")]
fn main() {
use libc::c_int;
use std::sync::Mutex;
lazy_static! {
static ref LOGS_RECEIVED: Mutex<Vec<(c_int, String)>> = Mutex::new(Vec::new());
}
fn log_handler(err: c_int, message: &str) {
let mut logs_received = LOGS_RECEIVED.lock().unwrap();
logs_received.push((err, message.to_owned()));
}
use rusqlite::trace;
unsafe { trace::config_log(Some(log_handler)) }.unwrap();
trace::log(10, "First message from rusqlite");
unsafe { trace::config_log(None) }.unwrap();
trace::log(11, "Second message from rusqlite");
let logs_received = LOGS_RECEIVED.lock().unwrap();
assert_eq!(logs_received.len(), 1);
assert_eq!(logs_received[0].0, 10);
assert_eq!(logs_received[0].1, "First message from rusqlite");
}
#[cfg(not(feature = "trace"))]
fn main() {}