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https://issues.apache.org/jira/browse/DRILL-7706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17085805#comment-17085805
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ASF GitHub Bot commented on DRILL-7706:
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arina-ielchiieva commented on pull request #2060: DRILL-7706: Implement Drill
RDBMS Metastore
URL: https://github.com/apache/drill/pull/2060
# [DRILL-7706](https://issues.apache.org/jira/browse/DRILL-7706): Implement
Drill RDBMS Metastore
## Description
Currently Drill has only one Metastore implementation based on Iceberg
tables. Iceberg tables are file based storage that supports concurrent writes /
reads but required to be placed on distributed file system.
This PR aims to implement Drill RDBMS Metastore which will store Drill
Metastore metadata in the database of the user's choice. Currently, PostgreSQL
and MySQL databases are supported, others might work as well but no testing was
done. Also out of box for demonstration / testing purposes Drill will setup
SQLite file based embedded database but this is only applicable for Drill in
embedded mode.
1. Fix issue with undeterministic execution of batch update / delete
statements, now they will be executed in the same order as they were added.
2. Abstracted Metastore common test classes to be used by different
Metastore implementations.
3. Added drill-metastore-override-example.conf with example of Drill
Metastore configuration.
4. Replaced list of metadata types which are required to be passed during
read / write operations with set to avoid possible duplicates.
5. Add RDBMS Metastore implementation, README.md and unit tests.
## Documentation
RDBMS Metastore section should be added:
http://drill.apache.org/docs/using-drill-metastore/
## Testing
Ran all unit tests, Functional & Advanced. Tested manually with SQLite,
PostgreSQL, MySQL.
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> Drill RDBMS Metastore
> ---------------------
>
> Key: DRILL-7706
> URL: https://issues.apache.org/jira/browse/DRILL-7706
> Project: Apache Drill
> Issue Type: New Feature
> Affects Versions: 1.17.0
> Reporter: Arina Ielchiieva
> Assignee: Arina Ielchiieva
> Priority: Major
> Fix For: 1.18.0
>
>
> Currently Drill has only one Metastore implementation based on Iceberg
> tables. Iceberg tables are file based storage that supports concurrent writes
> / reads but required to be placed on distributed file system.
> This Jira aims to implement Drill RDBMS Metastore which will store Drill
> Metastore metadata in the database of the user's choice. Currently,
> PostgreSQL and MySQL databases are supported, others might work as well but
> no testing was done. Also out of box for demonstration / testing purposes
> Drill will setup SQLite file based embedded database but this is only
> applicable for Drill in embedded mode.
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