README

README.md

@@ -0,0 +1,37 @@
+# Trino(PrestoSQL) Plugin in Go
+
+## Requirements
+- Java 17.0.4+, 64-bit
+- https://github.com/superbear/java-call-go
+
+## How to build
+
+### Build JAR
+```bash
+mvn clean package -Dcheckstyle.skipExec=true -DskipTests
+```
+This creates a `target/trino-plugin-in-go-402` directory.
+
+### Test
+```bash
+mvn clean test -Dcheckstyle.skipExec=true
+```
+
+## Running the container
+```bash
+docker compose up -d
+
+docker exec -ti trino trino
+
+# restart container after rebuild plugin
+docker restart trino
+```
+
+```sql
+trino> SELECT atoi('123');
+trino> SELECT toupper('hello world');
+```
+
+## References
+- [Trino Plugin implementation](https://trino.io/docs/current/develop/functions.html#plugin-implementation)
+- [Trino](https://github.com/trinodb/trino/blob/master/core/trino-main/src/main/java/io/trino/operator/scalar/StringFunctions.java)

docker-compose.yml

@@ -1,7 +1,9 @@
-version: '2.1'
+version: "3"
+
 services:
   trino:
     image: trinodb/trino:402
+    container_name: trino
     volumes:
       - ./target/trino-plugin-in-go-402:/lib/trino/plugin/trino-plugin-in-go-402
     ports: