QueryMachine
NOTE: This is a fork of the qm project. It specifically forks off from d7eef30cf0aec2afaa3da7b9c05691ce9fc80b08.
.NET Core port
This repository targets .NET Core (3.1), and most supporting library target .NET Standard 2.1. It's currently still a WIP, but a working prototype version of the XQuery.Console project now works as a .NET Core 3.1. app.
Overview
QueryMachine is database independent SQL engine for queries to non-specific source of the data, such as XML, flat files, regular relational databases or all of above. It supports XML-Related Specifications (SQL/XML) FCD ISO/IEC 9075-14:2005 (E). It was designed for one specific purpose: to execute the query for the data containing virtually in any type of the structured storage. However, there are extensions to standard SQL-92 which adds compatibility with the different data sources.
QueryMachine.XQuery
- QueryMachine.XQuery is XQuery 1.0 implementation based on XPathNavigator API.
- Key features of this XQuery implementation:
- Standard XPathNavigator API used
- Schema Aware XQuery
- On-demand document parsing
- Huge input files are not loaded into memory entirely
- XQuery expressions are compiled directly into MSIL
- Native support for MS Office OpenXML files
- Hash-join FLWOR optimization and implicit parallelization of XQuery requests
- XML mapping support (an experimental)
- Full implements of all minimal conformance features due to standard W3C XML Query Language XQuery Test Suite results on W3C