parser
JSqlParser
parser | JSqlParser | |
---|---|---|
3 | 4 | |
1,396 | 4,992 | |
0.4% | 1.5% | |
3.2 | 9.4 | |
6 months ago | 5 days ago | |
Go | Java | |
Apache License 2.0 | Apache License 2.0 |
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parser
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sqlc: Generating go code from sql statements
For MySQL the situation is a bit different. sqlc uses the parser of TiDB (https://github.com/pingcap/parser), which is a parser that aims to be basically compatible with MySQL, but is quite young and is not a MySQL parser. The most basic queries work, but even simple joins or aggregations usually result in variables with unknown data types or wrong nullability. So you loose a lot of the benefits of sqlc. Manual type annotations for MySQL also do not work most of the time. They are simply ignored and forwarded to MySQL as invalid query if they do not occur on a place where sqlc is expecting them.
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Wp-SQLite: WordPress running on an SQLite database
This is a disaster waiting to happen. Regular expressions should never be used to parse non-regular languages, of which SQL is one.
There are a variety of mature MySQL dialect parsers available[1][2], and MySQL should have its own public APIs for transforming a query into an AST. Any of those would be a safer and more correct alternative.
[1]: https://github.com/pingcap/parser
[2]: https://github.com/square/mysql-parser
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Open Source SQL Parsers
Pingcap parser is a MySQL parser in Go.
JSqlParser
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Semantic Diff for SQL
I wonder if this is a topical thread to check if anyone is aware of a Java based solution to parse a CREATE VIEW statement to get a mapping between the view columns and the corresponding source table columns. I checked out jsqlparser[0] and it does produce an AST which can be parsed using the visitor-pattern[1] but was wondering if there is a more "out-of-the-box" solution. Due to various reasons, querying the database information schema is not an option I can pursue.
[0]: https://github.com/JSQLParser/JSqlParser
[1]: https://en.wikipedia.org/wiki/Visitor_pattern
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Open Source SQL Parsers
JSQLParser can parse multiple SQL dialects like MySQL, Postgres and Oracle. The grammar can be modified to support other SQL dialects.
- Let's write a compiler, part 5: A code generator
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Racket v8.0
Interesting coincidence - I'm working on a parser that parses the AST produced by JSqlParser[0] for a create view statement to generate mapping between the columns of a view and the columns of its underlying table. It is an interesting example of having to use the visitor pattern[1].
[0]: https://github.com/JSQLParser/JSqlParser
What are some alternatives?
ANTLR - ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
Apache Calcite - Apache Calcite
mo-sql-parsing - Let's make a SQL parser so we can provide a familiar interface to non-sql datastores!
sqlglot - Python SQL Parser and Transpiler
pg_query - Ruby extension to parse, deparse and normalize SQL queries using the PostgreSQL query parser
zetasql - ZetaSQL - Analyzer Framework for SQL
sqlparse - A non-validating SQL parser module for Python
pg-query-emscripten - Emscripten Port of pg_query to easily play with it in the browser
Presto - The official home of the Presto distributed SQL query engine for big data
pglast - PostgreSQL Languages AST and statements prettifier: master branch covers PG10, v2 branch covers PG12, v3 covers PG13, v4 covers PG14, v5 covers PG15, v6 covers PG16