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

This repository contains common parts for Virtual Schema adapters for document data sources
https://github.com/exasol/virtual-schema-common-document

database document-data exasol exasol-integration virtual-schema

Last synced: 6 days ago
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This repository contains common parts for Virtual Schema adapters for document data sources

Host: GitHub
URL: https://github.com/exasol/virtual-schema-common-document
Owner: exasol
License: mit
Created: 2020-08-18T12:28:51.000Z (over 4 years ago)
Default Branch: main
Last Pushed: 2024-06-14T14:26:00.000Z (5 months ago)
Last Synced: 2024-06-14T22:38:41.711Z (5 months ago)
Topics: database, document-data, exasol, exasol-integration, virtual-schema
Language: Java
Homepage:
Size: 730 KB
Stars: 0
Watchers: 6
Forks: 2
Open Issues: 4
Metadata Files:
- Readme: README.md
- License: LICENSE

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README

        # Common module of Exasol Virtual Schema Adapters for Document Data Sources

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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.

```sql

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](doc/user_guide/edml_user_guide.md)

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

* [Dependencies](dependencies.md)

### Dialects:

* [DynamoDB](https://github.com/exasol/dynamodb-virtual-schema)

* [Files](https://github.com/exasol/virtual-schema-common-document-files): see [available storage variants](https://github.com/exasol/virtual-schema-common-document-files#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`