rusqlite | Ergonomic bindings to SQLite for Rust | Database library

by rusqlite Rust Version: v0.29.0 License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | rusqlite Summary

rusqlite is a Rust library typically used in Database applications. rusqlite has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Rusqlite is an ergonomic wrapper for using SQLite from Rust. It attempts to expose an interface similar to rust-postgres.

Support

Quality

Security

License

Reuse

Support

rusqlite has a medium active ecosystem.

It has 2142 star(s) with 278 fork(s). There are 18 watchers for this library.

It had no major release in the last 12 months.

There are 108 open issues and 353 have been closed. On average issues are closed in 197 days. There are 33 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of rusqlite is v0.29.0

Quality

rusqlite has 0 bugs and 0 code smells.

Security

rusqlite has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

rusqlite code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

rusqlite is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

rusqlite releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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rusqlite Key Features

No Key Features are available at this moment for rusqlite.

rusqlite Examples and Code Snippets

No Code Snippets are available at this moment for rusqlite.

Community Discussions

Trending Discussions on rusqlite

Replace strings with "null" value as real null values rusqlite

Is it possible to reduce the number of match arms caused by generics?

Cannot move out because of borrowing

What version of rusqlite should I use?

Rust mistyping for csv reading

Rust: Closure composition ownership

How to wrap functions with generic arguments which force a named lifetime in rust with a 'static lifetime

How can I use polymorphism with the Deref trait to have a a single object that can be represented by either a Transaction or Connection?

How do we use SELECT query with an external WHERE parameter in rusqlite?

How to insert and fetch date in a sqlite database using rusqlite?

QUESTION

Replace strings with "null" value as real null values rusqlite

Asked 2022-Jan-23 at 07:29

I need to convert strings that have the value null to actual null values in a SQLite DB using rusqlite. I'm not in control of these string values. I've found the Null struct, but I'm not sure how to concisely pass it as a parameter, but then use the string value when it's not null.

...

ANSWER

Answered 2022-Jan-23 at 04:06

I'm not familiar with rusqlite, but in general, the tool for “might be null” in Rust is Option, and taking a look at rusqlite::ToSql confirms that there is a

Source https://stackoverflow.com/questions/70818742

QUESTION

Is it possible to reduce the number of match arms caused by generics?

Asked 2021-Dec-17 at 10:51

I am "serializing" and "deserializing" a generic struct to and from an SQLite database. The struct has two members whose values are of generic types, V and T, both constrained to the DataType trait. When I want to reconstruct these from the information in the database, I haven't been able to find a way around specifying match arms for every combination of V and T. Given that I will eventually have around 20 data types, that means 20 * 20 = 400 match arms. Is there any way around this? An unsafe solution is also acceptable.

Here is a MWE with two data types:

...

ANSWER

Answered 2021-Dec-17 at 10:51

You can do that with the following (pretty complex) macro.

Source https://stackoverflow.com/questions/70390836

QUESTION

Cannot move out because of borrowing

Asked 2021-Oct-02 at 10:56

I have the following MWE:

...

ANSWER

Answered 2021-Oct-02 at 10:56

After tx.prepare borrows, what is ownership the Transaction created and assigned to tx ?

Not sure I understand what you're asking. A borrow doesn't change ownership, it borrows from the owner. So tx owns the transaction object, stmt borrows it, and thus the ownership can not change.

Is tx still the owner of the Transaction ?

Yes.

When tx.commit() is called, Transaction shoud be owned by tx and be safe to be moved when calling .commit(), no ?

In most cases yes, the problem here is that Statement is not a "trivial" type, it implements Drop which means it will (by default) live until the end of its drop scope unless it is explicitly dropped (e.g. by calling drop(stmt)). This, then, compiles with Transaction::commit as you can't move out of an "active borrow".

You can observe this behaviour simply by mounting a type-scheme which matches that of Rusqlite: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=32532b41467706d0d80756525a0f43fe

As is the code compiles, but if you uncomment line 24 (impl Drop for …) it stops compiling, with the same error you get here.

Your solutions here are:

if the MRE matches the actual code, don't bother preparing the statement, that's only useful if you have multiple queries
explicitly drop() the statement once you're done with it
or have it live in its own block, so its drop scope is shorter than the function

Source https://stackoverflow.com/questions/69415738

QUESTION

What version of rusqlite should I use?

Asked 2021-Oct-01 at 10:46

I'm learning the rust language. So, I try to build a simple web app using sqlite3. But it gets multiple packages link error.
I saw some solution for this error(ex. this), but they didn't work.
The cause seems to be that the version specification of rusqlite is wrong, but I don't know the correct version specification.
How should I configure the cargo.toml?

Source codes are here.
cargo.toml

...

ANSWER

Answered 2021-Oct-01 at 10:46

You're directly depending on rusqlite and using r2d2-sqlite3 which itself depends on rusqlite.

Since rusqlite binds to a native library as the message indicates you can't have two versions of rusqlite linking to different versions of sqlite3(-sys), so you need to ensure you use the same version of rusqlite as r2d2.

If you're not going to publish on Cargo, the easiest by far is to leave rusqlite's version as a wildcard ("*"), that way the dependency resolver will give you whatever works for r2d2-sqlite3. Otherwise you need to check the version of r2d2-sqlite3 you're using and match it.

Incidentally... r2d2-sqlite3 0.1.1? That seems to be over 4 years old, the current version seems to be 0.18. I'm slightly surprised r2d2 works, though I guess it changes relatively little (0.8.0 was 4 years ago, current is 0.8.9). Though I'm not sure what the utility of r2d2 is for sqlite3, especially for "a simple web app".

Source https://stackoverflow.com/questions/69403524

QUESTION

Rust mistyping for csv reading

Asked 2021-Sep-07 at 16:58

use walkdir::WalkDir;
use std::ffi::OsStr;
use rusqlite::{params, Connection, Result};
use std::error::Error;
use std::io;
use std::process;
use std::path::Path;
use serde::{Serialize, Deserialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Trade {
    id: usize,
    price: f64,
    quantity: f64,
    quoted_quantity: f64,
    time: i64,
    is_buyer_maker: bool,
    is_best_match: bool,
}

fn process_csv(file: &Path, db: &Connection) -> Result<(), Box> {
    let mut rdr = csv::Reader::from_path(file)?;
    for result in rdr.records() {
        match result.deserialize::() {
            Ok(s) => {

                db.execute("INSERT INTO trades (id, price, quantity, quoted_quantity, time, is_buyer_maker, is_best_match) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)",
                           params![s.id, s.price, s.quantity, s.quoted_quantity, s.time, s.is_buyer_maker, s.is_best_match])?;
            },
            Err(e) => println!("Failed to deserialize: {}", e),
        }
    }
}

fn main () -> Result<(), Box> {
    let conn = Connection::open("bot.db")?;
    conn.execute(
        "CREATE TABLE trades (
                  id              INTEGER PRIMARY KEY,
                  price           REAL NOT NULL,
                  quanity         REAL NOT NULL,
                  quoted_quatity  REAL NOT NULL,
                  time            INTEGER NOT NULL,
                  is_buyer_maker  INTEGER NOT NULL,
                  is_best_match   INTEGER NOT NULL,
                  )",
        [],
    )?;
    for entry in WalkDir::new("E:/binance-public-data/python/data/spot/monthly/trades/").into_iter().filter_map(|e| e.ok()) {
        println!("Processing: {}", entry.path().display());
        if let Err(e) = process_csv(entry.path(), &conn) {
            println!("Processing failed: {}", e);
        }
    }
    Ok(())
}

...

ANSWER

Answered 2021-Sep-07 at 16:58

Your first error is because you're calling csv's .deserialize() on the wrong variable, it should be called on the reader. Change:

Source https://stackoverflow.com/questions/69091510

QUESTION

Rust: Closure composition ownership

Asked 2021-Aug-01 at 16:51

To avoid nesting matches I am trying to use the and_then method for Result. The problem arises when I try to convert this

...

ANSWER

Answered 2021-Aug-01 at 16:51

The problem is that conn.prepare returns a statement that refers to conn, but conn is destroyed at the end of the closure so it's no longer here when the statement tries to use it. The idiomatic way to do what you want would be to use the ? operator:

Source https://stackoverflow.com/questions/68612312

QUESTION

How to wrap functions with generic arguments which force a named lifetime in rust with a 'static lifetime

Asked 2021-Jun-06 at 07:24

I am working on a larger private project and introduced something like a function registry for hooks to be used. That worked well so far, till I was forced to use a a type with a named lifetime In my case it was rusqlite::Transaction<'c>. Due to this all dependend strucs has to introduce a named lifetime too, right?

Finally I got some compiler lifetime errors, I dont know, how to resolve them.

To narrow down the problem I wrote this example code. Please note that you may not change the Transaction-Struct hence this is just a example for any struc require a named lifetime parameter.

...

ANSWER

Answered 2021-Jun-03 at 10:47

One easy option if that's feasible is to have Holder but f: fn(&T) (and exe: fn(&self, &T):

Source https://stackoverflow.com/questions/67819856

QUESTION

How can I use polymorphism with the Deref trait to have a a single object that can be represented by either a Transaction or Connection?

Asked 2021-May-13 at 04:56

I am using the rustqlite library for a SQLite database (playground)

...

ANSWER

Answered 2021-May-13 at 04:56

Disclaimer: I haven't tried this code. But it is only here to give you an idea of the direction to go in.

Firstly, local variables (on the stack) in Rust must be fixed sized. This is one of the problems you are facing. Transaction and Connection aren't the same sized. So you can't achieve "Polymorphism" on the stack, without some tricks.

The two ways to do this are Enum types, and Boxing (putting the structs on the Heap, and adding a VTable).

I won't go over Boxing, since that is relatively simple.

The second problem you have is that Transaction's lifetime is tied to the Connection, so any moving of the Transaction will require you to move the Connection as well.

Source https://stackoverflow.com/questions/67508261

QUESTION

How do we use SELECT query with an external WHERE parameter in rusqlite?

Asked 2021-Apr-14 at 11:46

I need to fetch a row from a database using SELECT and WHERE, I need to fetch a row depending on the age, I tried this way using some other tutorial.

...

ANSWER

Answered 2021-Apr-14 at 11:46

You can use params of query_map() for this like that:

Source https://stackoverflow.com/questions/67089430

QUESTION

How to insert and fetch date in a sqlite database using rusqlite?

Asked 2021-Apr-13 at 06:37

I have a struct with NaiveDate field and I want to insert this field to a table. This is my whole code

...

ANSWER

Answered 2021-Apr-13 at 06:37

You must compile with the additional chrono feature to have the FromSql and ToSql traits implemented for chrono types.

Change the declaration in your Cargo.toml to be

Source https://stackoverflow.com/questions/67069764

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install rusqlite

You can download it from GitHub.
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.

Support

The base rusqlite package supports SQLite version 3.6.8 or newer. If you need support for older versions, please file an issue. Some cargo features require a newer SQLite version; see details below.

Find more information at: