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https://github.com/fzakaria/calcite-git
A native Calcite Git adapter
https://github.com/fzakaria/calcite-git
apache calcite git java relational-algebra sql
Last synced: 28 days ago
JSON representation
A native Calcite Git adapter
- Host: GitHub
- URL: https://github.com/fzakaria/calcite-git
- Owner: fzakaria
- License: mit
- Created: 2021-02-07T23:39:37.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2021-02-09T18:19:23.000Z (over 3 years ago)
- Last Synced: 2024-05-02T06:04:21.520Z (6 months ago)
- Topics: apache, calcite, git, java, relational-algebra, sql
- Language: Java
- Homepage: https://calcite.apache.org
- Size: 54.7 KB
- Stars: 8
- Watchers: 4
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Calcite Git Adapter
[](https://javadoc.io/doc/com.github.fzakaria/calcite-git)
This is a [Calcite](https://calcite.apache.org/) adapter for [Git](https://git-scm.com/) that uses
the [JGit](https://www.eclipse.org/jgit/) library.
> JGit is a lightweight, pure Java library implementing the Git version control system
This is adapter is similar in spirit to [GitCommitsTableFunction](https://github.com/apache/calcite/blob/d9a81b88ad561e7e4cedae93e805e0d7a53a7f1a/plus/src/main/java/org/apache/calcite/adapter/os/GitCommitsTableFunction.java)
which his included in the Calcite repository, however by using JGit, the goal is to be able to expose more powerful
planning optimizations, and simpler code.
```xml
com.github.fzakaria
calcite-git
0.1
```
## Demo
A helpful `exec:java` is included that will start up [sqlline](https://github.com/julianhyde/sqlline) with the
proper driver loaded pointing to the current directory.
```bash
❯ mvn exec:java
[INFO] Scanning for projects...
[INFO]
[INFO] -------------------< io.github.fzakaria:calcite-git >-------------------
[INFO] Building calcite-git 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- exec-maven-plugin:1.6.0:java (default-cli) @ calcite-git ---
20:32:33.601 [sqlline.SqlLine.main()] WARN i.g.f.calcite.adapter.git.GitDriver - No directory provided, defaulting to /home/fmzakari/code/github.com/fzakaria/calcite-git
Transaction isolation level TRANSACTION_REPEATABLE_READ is not supported. Default (TRANSACTION_NONE) will be used instead.
sqlline version 1.9.0
0: jdbc:git:> !tables
+-----------+-------------+------------+--------------+---------+----------+------------+-----------+---------------------------+------+
| TABLE_CAT | TABLE_SCHEM | TABLE_NAME | TABLE_TYPE | REMARKS | TYPE_CAT | TYPE_SCHEM | TYPE_NAME | SELF_REFERENCING_COL_NAME | REF_ |
+-----------+-------------+------------+--------------+---------+----------+------------+-----------+---------------------------+------+
| | git | COMMITS | TABLE | | | | | | |
| | metadata | COLUMNS | SYSTEM TABLE | | | | | | |
| | metadata | TABLES | SYSTEM TABLE | | | | | | |
+-----------+-------------+------------+--------------+---------+----------+------------+-----------+---------------------------+------+
0: jdbc:git:> select c.id, c.author.created_at, c.author.name from commits as c;
+------------------------------------------+-----------------------+---------------+
| ID | CREATED_AT | NAME |
+------------------------------------------+-----------------------+---------------+
| bcb92091ef526f24908761d867d6e08b9a83ca5f | 2021-02-08 04:10:02.0 | Farid Zakaria |
| 6827d9e82290c81422b77eeb9d25fccdea164c3c | 2021-02-08 02:29:39.0 | Farid Zakaria |
| 9e0acbd0afe66eb2dc2c376fa95456460dd5e128 | 2021-02-07 23:52:58.0 | Farid Zakaria |
| cbd71f6421597c2e1c1a4dbe098c653fdd11628a | 2021-02-07 23:51:50.0 | Farid Zakaria |
| ccd0020a85f2b719ae89d37b5cd059321fbcb98d | 2021-02-07 23:43:24.0 | Farid Zakaria |
| 7b3eb02c4f7cb7a91f82726d56add680c7e80d28 | 2021-02-07 23:40:16.0 | Farid Zakaria |
| ad6c8068e70f98ae7c41d779b0b1e3cf006788e2 | 2021-02-07 21:12:45.0 | Farid Zakaria |
| 504132ce9bf52d7ce5d1d507f6ac8368590b78e5 | 2021-02-07 21:12:25.0 | Farid Zakaria |
+------------------------------------------+-----------------------+---------------+
8 rows selected (0.937 seconds)
```
If you would like to use it directly in your code with _jdbc_ here is a minimal example.
```java
public class Main {
public static void main(String[] args) {
final Properties info = new Properties();
try (Connection connection = DriverManager.getConnection("jdbc:git:", info)) {
try (Statement statement = connection.createStatement()) {
final ResultSet resultSet = statement.executeQuery("select * from commits limit 10");
// take a peek at the tests for how to parse the ResultSet
}
}
}
}
```
Please consult the tests for additional examples.