go-mysql-server
MySqlConnector
go-mysql-server | MySqlConnector | |
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23 | 8 | |
2,202 | 1,356 | |
38.1% | 0.6% | |
9.9 | 9.1 | |
1 day ago | 10 days ago | |
Go | C# | |
Apache License 2.0 | MIT License |
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go-mysql-server
- A MySQL compatible database engine written in pure Go
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What I Talk About When I Talk About Query Optimizer (Part 1): IR Design
We implemented a query optimizer with a flexible intermediate representation in pure Go:
https://github.com/dolthub/go-mysql-server
Getting the IR correct so that it's both easy to use and flexible enough to be useful is a really interesting design challenge. Our primary abstraction in the query plan is called a Node, and is way more general than the IR type described in the article from OP. This has probably hurt us: we only recently separated the responsibility to fetch rows into its own part of the runtime, out of the IR -- originally row fetching was coupled to the Node type directly.
This is also the query engine that Dolt uses:
https://github.com/dolthub/dolt
But it has a plug-in architecture, so you can use the engine on any data source that implements a handful of Go interface.
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I created an in-memory SQL database called MemSQL as a learning project
Might be interested in https://github.com/dolthub/go-mysql-server, which also does this
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Implementing the MySQL server protocol for fun and profit
https://github.com/dolthub/go-mysql-server
One item under "Scope of this project":
Provide a runnable server speaking the MySQL wire protocol, connected to data sources of your choice.
- MySQL-mimic - Python implementation of the MySQL server wire protocol.
- Parsing SQL
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Litetree – SQLite with Branches
I just wanted to say thanks for https://github.com/dolthub/go-mysql-server
This is incredibly useful for anyone who wants to build their own DB or wrap another datasource so it's queryable via MySQL protocol.
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Dolt Is Git for Data
a very cool project they also maintain is a MySQL server framework for arbitrary backends (in Go): https://github.com/dolthub/go-mysql-server
You can define a "virtual" table (schema, how to retrieve rows/columns) and then a MySQL client can connect and execute arbitrary queries on your table (which could just be an API or other source)
- A Golang library and interface that allows querying anything with SQL
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The world of PostgreSQL wire compatibility
Thanks for this write up! I've been really interested in postgres compatibility in the context of a tool I maintain (https://github.com/mergestat/mergestat) that uses SQLite. I've been looking for a way to expose the SQLite capabilities over a more commonly used wire-protocol like postgres (or mysql) so that existing BI and visualization tools can access the data.
This project is an interesting one: https://github.com/dolthub/go-mysql-server that provides a MySQL interface (wire and SQL) to arbitrary "backends" implemented in go.
It's really interesting how compatibility with existing protocols has become an important feature of new databases - there's so much existing tooling that already speaks postgres (or mysql), being able to leverage that is a huge advantage IMO
MySqlConnector
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Faster MySQL with HTTP/3
MySqlConnector (the most popular .NET library for MySQL, and the one that I authored) has supported protocol compression for many years: https://github.com/mysql-net/MySqlConnector/issues/31.
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Implementing the MySQL server protocol for fun and profit
> I kept technical notes about the protocol, to serve as a future reference for myself and for other developers.
As someone who's written a MySQL client (in C#: https://github.com/mysql-net/MySqlConnector), I'd be very interested to see your notes. Are they available anywhere, or were they the confidential IP of your client?
> Unsurprisingly, bugs were uncovered every time a new client was added.
I've faced the same thing, from a client perspective. Every time a new server is tested (MySQL, MariaDB, Amazon Aurora, Azure Database for MySQL, etc.), I find slightly different interpretations of the protocol and have to accommodate them.
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Ask HN: Examples of Top C# Code?
I have had the pleasure of contributing to a couple different networked drivers with very talented maintainers that I like to use as references.
One supports a wide array of Framework versions and has both Sync and Async I/O, as it must to implement the ADO.NET database driver interfaces. Reading the internals really highlight the way that .NET has evolved over the years and what must be done in each target version to maximize performance:
https://github.com/mysql-net/MySqlConnector
The other supports .NET 6 only with Async I/O only. This support policy seems to be the way that "modern" .NET development is headed, as .NET 6 will be the floor for LTS .NET (formerly .NET Core) releases in a few months. Async APIs only greatly simplify development, and make it simpler to remain performant when targeting WASM.
https://github.com/Cysharp/AlterNats
As a library maintainer, one thing I often wonder about is how to indicate .NET version support. One option would be for the major version of the library to track the major version of .NET, so if I were to publish a new library today then start with .NET 6 support and start with version number 6.0.0 instead of 1.0.0. This would limit the library to only making breaking changes when the .NET version changes though.
- Do I need to worry about connection pooling/etc with MySql.Data.MySqlClient?
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Need some help/direction reading CSV into MySQL without duplication
Use the MySqlConnector to load the data into a temp table using the bulk copy API. Both of my libraries implement the IDataReader (DbDataReader) interface, so they can be directly used with the bulk copy APIs. Then insert into the final table from the temp table filtering out rows that are already in the final table.
- Finding an Authorization Bypass on My Own Website
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Performance Improvements in .NET 6
I'm the author of what you might call the "new" MySQL ADO.NET library: https://github.com/mysql-net/MySqlConnector
I agree with your impression that developers of the other library don't seem to be "plugged in to" the .NET ecosystem. As an independent developer (not affiliated with Oracle or Microsoft), I've been able to influence GitHub PRs that shape the ADO.NET API for .NET 6.0, just by showing up and contributing; I haven't seen anyone from the Oracle MySQL team participating. Meanwhile, they violate basic principles of the .NET Framework Design Guidelines that have been around for over a decade (https://docs.microsoft.com/en-us/dotnet/standard/design-guid...), which makes their library feel alien to a .NET programmer (regardless of the quality issues it might have).
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MongoDB C# Driver Vs. MongoDB.Entities Benchmark
e.g. this community effort of a MySQL ADO.NET provider is miles ahead of Oracle's driver.
What are some alternatives?
vitess-sqlparser - simply SQL Parser for Go ( powered by vitess and TiDB )
Pomelo.EntityFrameworkCore.MySql - Entity Framework Core provider for MySQL and MariaDB built on top of MySqlConnector
alasql - AlaSQL.js - JavaScript SQL database for browser and Node.js. Handles both traditional relational tables and nested JSON data (NoSQL). Export, store, and import data from localStorage, IndexedDB, or Excel.
Avalonia.FuncUI - Develop cross-plattform GUI Applications using F# and Avalonia!
sqlite-parser - JavaScript implentation of SQLite 3 query parser
openiddict-core - Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET
grammars-v4 - Grammars written for ANTLR v4; expectation that the grammars are free of actions.
Hot Chocolate - Welcome to the home of the Hot Chocolate GraphQL server for .NET, the Strawberry Shake GraphQL client for .NET and Banana Cake Pop the awesome Monaco based GraphQL IDE.
zetasql - ZetaSQL - Analyzer Framework for SQL
Marten - .NET Transactional Document DB and Event Store on PostgreSQL
lakeFS - lakeFS - Data version control for your data lake | Git for data
aqtinstall - aqt: Another (unofficial) Qt CLI Installer on multi-platforms