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|Apache License 2.0||BSD 3-clause "New" or "Revised" License|
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Mangle, a programming language for deductive database programming
12 projects | news.ycombinator.com | 26 Nov 2022
There are even table-valued functions.
These things are not widespread, and differ by implementation, and the way these are used by clients are copy-and-paste. Something as thoughtful as ZetaSQL https://github.com/google/zetasql does not have mechanisms for structuring (modules, packages, interfaces). SQL will not, cannot evolve into such a direction (or, anything that evolves, will not be recognizable as SQL).
goccy/bigquery-emulator: BigQuery emulator server implemented in Go
2 projects | /r/bigquery | 17 Oct 2022
Hi, I develop a BigQuery emulator ( https://github.com/goccy/bigquery-emulator ) from early 2022. It is written in Go, but can be used from bq command line tool and other language's (e.g. Python ) client SDK after installing docker image or released binary. It currently supports over 200 of the nearly 330 standard functions in BigQuery and all data types except GEOGRAPHY ( see https://github.com/goccy/go-zetasqlite#status for details ). ZetaSQL ( https://github.com/google/zetasql ) is used to parse and analyze queries.
7 projects | news.ycombinator.com | 22 Aug 2022
If you don't want to do it yourself, there's this:
Parsing is huge but it's amazing how small a part of the job it is. This library isn't even the half of it.
SQLGlot: SQL parser, transpiler, optimizer – translate to Presto, Spark, Hive
9 projects | news.ycombinator.com | 4 Jul 2022
New PostgreSQL Interface for Cloud Spanner
2 projects | news.ycombinator.com | 12 Oct 2021
It is amazingly good.
You give it textual SQL (+ schema + all your function definitions) and it returns a really clean logical query plan. It is also happy to do this via a protobufs so you can use it from languages other than C++. It is also tested and documented up the wazoo. It has been such a pleasure to work with.
Anyway, the big problem with ZetaSQL is that it is not a common SQL dialect.
It seems that the only reasonable way to do this PostgreSQL interface for Cloud Spanner is to add a second parser (and other extensions) to ZetaSQL. If I am correct, I really really hope they open source that part of ZetaSQL as well - it would be a massive step forward for open source SQL tooling.2 projects | news.ycombinator.com | 12 Oct 2021
I mean the postgres parser (and semantic changes) for ZetaSQL. The zetasql parser is in a file called zetasql/parser/bison_parser.y, I strongly suspect they now have a file called something like zetasql/pgparser/bison_parser.y as well (and much more pervasive changes to support the deeper differences in the dialects).
This is the lexical structure and syntax docs for the new postgres inteface to cloud spanner:
And this is the zetasql lexical structure and syntax docs:
Notice that the new PG docs are an edit of the Zeta ones - evidence that my hypothesis is correct.
Open Source SQL Parsers
17 projects | dev.to | 8 Oct 2021
zetasql implements BigQuery, Spanner, and Dataflow dialects.
Let's write a compiler, part 5: A code generator
14 projects | news.ycombinator.com | 19 Aug 2021
ZetaSQL seems like it could be a fit for your use case. I've worked with Apache Calcite in the past and found it to be very complex to work with. I found ZetaSQL to be a little easier to use.
BigQuery Language Server
2 projects | /r/bigquery | 6 Jul 2021
I’m not aware of one but you could probably use ZetaSQL to put one together, the difficult work has been opened, you’d just need to add the LSP layer.
A new template-defined width integer C++ library has snuck its way into Google ZetaSQL
2 projects | /r/coolgithubprojects | 9 Mar 2021
Some additional helper functions here.
Library to parse slash commands with validation?
3 projects | /r/dotnet | 2 Jun 2023
How should I prepare for AI-driven changes in the industry as a Software Engineering Manager
2 projects | /r/ExperiencedDevs | 3 May 2023
Download the ANTLR jar from https://www.antlr.org/download/antlr-4.9.2-complete.jar Add the ANTLR jar to your project's classpath. Install the ANTLR Kotlin target by following the instructions at https://github.com/antlr/antlr4/blob/master/doc/targets/Kotlin.md Next, you'll need a Perl grammar file for ANTLR:
Scripting language for Java
2 projects | /r/javahelp | 20 Dec 2022
Depending on how complex your expressions are, you might consider using something like antlr and writing your own parser for it. Setting up something to handle math and string operations wouldn’t be very hard and then you can control the syntax however you like. You can use a visitor and visit each node in the syntax tree and return the result of each sub-expression.
SQLite Internals: How the Most Used Database Works
4 projects | news.ycombinator.com | 19 Dec 2022
> ...than it would be to learn the exact syntax and quirks and possibly bugs of someone else's implementation...
Yup. Also, having deep knowledge of the language is required.
SQLite's grammar is neat. Creating a compatible parser would make a fun project. Here's a pretty good example: https://github.com/bkiers/sqlite-parser (Actual ANTLR 4 grammar: https://github.com/bkiers/sqlite-parser/blob/master/src/main... )
Postgres, which tries to be compliant with the latest standards, however...
SQL-2016 is a beast. Not to mention all the dialects.
I'm updating my personal (soon to be FOSS) grammar from ANTLR 3 LL(k) to ANTLR 4 ALL().
I've long had a working knowledge of SQL-92, with some SQL-1999 (eg common table expressions).
But the new structures and extensions are a bit overwhelming.
Fortunately, ANTLR project has ~dozen FOSS grammars to learn from. https://github.com/antlr/grammars-v4/tree/master/sql
They mostly mechanically translate BNFs to LL(k) with some ALL(). Meaning few take advantage of left-recursion. https://github.com/antlr/antlr4/blob/master/doc/left-recursi...
Honestly, I struggled to understand these grammars. Plus, not being conversant with the SQL-2016 was a huge impediment. Just finding a succinct corbis of test cases was a huge hurdle for me.
Fortunately, the H2 Database project is a great resource. https://github.com/h2database/h2database/tree/master/h2/src/...
Now for the exciting conclusion...
My ANTLR grammar which passes all of H2's tests looks nothing like any of the official or product specific BNFs.
Further, I found discrepancy between the product specific BNFs and their implementations.
So a lot of trial & error is required for a "real world" parser. Which would explain why the professional SQL parsing tools charge money.
I still think creating a parser for SQLite is a great project.
sqlfluff VS ANTLR - a user suggested alternative
2 projects | 12 Dec 2022
can be used to parse
Bored CS student in my junior year. Give me something to do! (free plugins)
7 projects | /r/admincraft | 20 Aug 2022
I already posted here about a project, but I could also use help on Mantle. It's a new command framework powered by ANTLR, if that's something you're interested in.
2 projects | /r/golang | 3 Feb 2022
ive been tryng to work with antlr4 and go but it seems that i cant import the runtime, it says that the antlr runtime isnt in the gopath but ive already done go get github.com/antlr/antlr4/runtime/antlr4 and i dont know what to do now, im on windows if anyone knows what to do it would be very helpful. thanks already
Open Source SQL Parsers
17 projects | dev.to | 8 Oct 2021
An alternate approach is to implement the SQL grammar using parser generators like ANTLR. There are similar open source parser generators in other popular languages.
Are Functional Programming Languages the best option for Crafting a Compiler?
4 projects | /r/Compilers | 5 Sep 2021
How to create a small json lib using antlr and shapeless
4 projects | dev.to | 7 May 2021
We will change it a little bit soon, but for now let's look on what's going on there. In general, grammar consists of parser and lexer rules.
What are some alternatives?
JFlex - The fast scanner generator for Java™ with full Unicode support
Apache Calcite - Apache Calcite
sqlparse - A non-validating SQL parser module for Python
lsp-mode - Emacs client/library for the Language Server Protocol
JSqlParser - JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern
sql-parser - A validating SQL lexer and parser with a focus on MySQL dialect.
pgsql-parser - PostgreSQL Query Parser for Node.js
proleap-cobol-parser - ProLeap ANTLR4-based parser for COBOL
GoJavaWasm - A Java project for running Go(lang)'s WebAssembly code