Common module of Exasol Virtual Schema Adapters for Document Data Sources

This repository contains common parts for Virtual Schema adapters for document data sources.

Push Down Selection

This Virtual Schema adapter supports pushing-down certain filters from the WHERE clause to the data source. Which filters are supported specifically depends on the dialect.

Like

When pushing down LIKE expressions this adapter only supports \ as escape character.

If you specify a different escape character like in the following example the Virtual Schema will throw an Exception.

SELECT * FROM FAMILY WHERE NAME LIKE 'T?' ESCAPE ':';

If you specify a different escape character by setting DEFAULT_LIKE_ESCAPE_CHARACTER the Virtual Schema will ignore it and still use \.

Information for Users

• EDML User Guide
• Changelog
• Dependencies

Dialects:

• DynamoDB
• Files: see available storage variants

Information for Developers

You can use this repository as a basis for developing a custom Virtual Schema for document data.

Running Integration Tests

Integration tests require a JDK 17 for building a mock adapter project. Please set one of the following environment variables pointing to a JDK 17 home:

• JAVA17_HOME
• JAVA_HOME_17_X64