JarCastingCalcite Git Adapter
This is a Calcite adapter for Git that uses the JGit library.
JGit is a lightweight, pure Java library implementing the Git version control system
This is adapter is similar in spirit to GitCommitsTableFunction 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.
<dependency>
<groupId>com.github.fzakaria</groupId>
<artifactId>calcite-git</artifactId>
<version>0.1</version>
</dependency>
Demo
A helpful exec:java is included that will start up sqlline with the proper driver loaded pointing to the current directory.
❯ 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.
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.