https://github.com/exasol/exasol-virtual-schema-common-lua

Common library of the Lua-based Exasol Virtual Schema and Row-Level-Security
https://github.com/exasol/exasol-virtual-schema-common-lua

exasol exasol-integration virtual-schema

Last synced: 19 days ago
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Common library of the Lua-based Exasol Virtual Schema and Row-Level-Security

• Host: GitHub
• URL: https://github.com/exasol/exasol-virtual-schema-common-lua
• Owner: exasol
• License: mit
• Created: 2023-04-18T10:55:27.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2025-02-26T14:58:47.000Z (over 1 year ago)
• Last Synced: 2025-05-25T08:41:56.676Z (about 1 year ago)
• Topics: exasol, exasol-integration, virtual-schema
• Language: Lua
• Homepage:
• Size: 45.9 KB
• Stars: 0
• Watchers: 10
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Exasol Virtual Schema Common Lua

This is a common library of the Lua-based Exasol Virtual Schema and Row-Level-Security.

It is the middle layer of the two Virtual Schemas.

    

        LayerModule

    

    

        

            3

            Exasol Virtual Schema (Lua)

            Row-level Security (Lua)

        

        2Exasol Virtual Schema Common Lua (this library)

        

            1

            

                Virtual Schema Common Lua

            

        

  

## Information for Users

This is a base library required to build the actual Virtual Schemas. If you plan to use the software in Exasol, please

check the respective repositories.

* [Exasol Virtual Schema (Lua)](https://github.com/exasol/exasol-virtual-schema-lua)

* [Row-level Security (Lua)](https://github.com/exasol/row-level-security-lua)

* [System Requirements](doc/system_requirements.md)

## Information for Developers

* [Changelog](doc/changes/changelog.md)

* [API Documentation](https://exasol.github.io/exasol-virtual-schema-common-lua/api/)

### Structure

The library consists of a couple of base classes that Virtual Schemas need that use the Exasol database as a _data source_.

The library itself sits on top of [Virtual Schema Common Lua](https://github.com/exasol/virtual-schema-common-lua), the foundation of all Virtual Schemas written in Lua.

![Library Structure of EVSCL](doc/images/generated/cl_exasol_virtual_schema.svg)

Note that you only find implementations for _local_ reading of metadata and query rewriting here. The reason for this is that remote access is only relevant for the [Exasol Virtual Schema for Lua](https://github.com/exasol/exasol-virtual-schema-lua) and therefore not a common part.