docs/custom_sql_parser.md - datafusion-sqlparser-rs - Git at Google

 # Writing a Custom SQL Parser

 I have explored many different ways of building this library to make it easy to extend it for custom SQL dialects. Most of my attempts ended in failure but I have now found a workable solution. It is not without downsides but this seems to be the most pragmatic solution.

 The concept is simply to write a new parser that delegates to the ANSI parser so that as much as possible of the core functionality can be re-used.

 I also plan on building in specific support for custom data types, where a lambda function can be parsed to the parser to parse data types.

 For an example of this, see the [DataFusion](https://github.com/datafusion-rs/datafusion) project.
	# Writing a Custom SQL Parser

	I have explored many different ways of building this library to make it easy to extend it for custom SQL dialects. Most of my attempts ended in failure but I have now found a workable solution. It is not without downsides but this seems to be the most pragmatic solution.

	The concept is simply to write a new parser that delegates to the ANSI parser so that as much as possible of the core functionality can be re-used.

	I also plan on building in specific support for custom data types, where a lambda function can be parsed to the parser to parse data types.

	For an example of this, see the [DataFusion](https://github.com/datafusion-rs/datafusion) project.