rhizome
sqlparse
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rhizome | sqlparse | |
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8 | 7 | |
814 | 3,574 | |
- | - | |
1.8 | 8.2 | |
almost 3 years ago | 3 days ago | |
Ruby | Python | |
MIT License | BSD 3-clause "New" or "Revised" License |
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rhizome
- How do optimizing compilers convert variables into registers
- YJIT: Building a New JIT Compiler for CRuby
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Tenderjit – A JIT for Ruby Written in Ruby
There was actually an existing, similar in concept, Ruby JIT, Rhyzome: https://github.com/chrisseaton/rhizome.
It's good to see (IMO) the development of a JIT in a strict sense. I'm personally skeptical about the current approach (invoking a compiler separately).
On the other hand, it's important to know that JITs may take a long development time to be performant, and that they also complicate the performance profile of a virtual machine.
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Let's write a compiler, part 5: A code generator
Lots of compiler tutorials are like this - there's very little out there to explain how compilers really work.
This is my effort - trying to show genuine data structures and processes.
- Thoughts about Intermediate representations
- A JIT for Ruby, implemented in pure Ruby (/r/ruby)
- Rhizome – a JIT for Ruby, implemented in pure Ruby
sqlparse
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Show HN: Databasediagram.com – Private, Text to Entity-Relationship Diagram Tool
Suggest checking out the sqlparse library for a way to do the different flavours without needing to address each case directly: https://github.com/andialbrecht/sqlparse
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Data Load Diagram
Gotcha, since we haven't actually written all of this yet I don't have any useful code snippets to share but we've discussed tackling the problem internally using something like sqlparse. You'd need to identify the relevant sql chunks, parse them for table dependency information and then create the relevant entities in whichever data lineage tool you were using.
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This Week In Python
sqlparse – A non-validating SQL parser module for Python
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Open Source SQL Parsers
Regular expressions is a popular approach to extract information from SQL statements. However, regular expressions quickly become too complex to handle common features like WITH, sub-queries, windows clauses, aliases and quotes. sqlparse is a popular python package that uses regular expressions to parse SQL.
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Automated SQL formatting checks
This one is not bad: https://github.com/andialbrecht/sqlparse.
- Let's write a compiler, part 5: A code generator
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BigQuery Lineage
We used this repo for this: https://github.com/andialbrecht/sqlparse. I may have miscommunicated. We didn't write the parser from scratch, we created a way for the parser to detect downstream and upstream dependencies of the resource.
What are some alternatives?
yjit - Optimizing JIT compiler built inside CRuby
zetasql - ZetaSQL - Analyzer Framework for SQL
pyparsing - Python library for creating PEG parsers [Moved to: https://github.com/pyparsing/pyparsing]
sqlite-parser - JavaScript implentation of SQLite 3 query parser
Lark - Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.
grammars-v4 - Grammars written for ANTLR v4; expectation that the grammars are free of actions.
PLY - Python Lex-Yacc
langjam
sqlfluff - A modular SQL linter and auto-formatter with support for multiple dialects and templated code.
swifties - a custom language construction kit
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