Add custom graph executor and implement filter node to test it (#2)

Reviewed-on: vato007/coster-rs#2

src/bin/agent2/main.rs

@@ -1,5 +1,4 @@
-use coster_rs::upload_to_db;
-use sqlx::{any::AnyPoolOptions, mssql::MssqlPoolOptions};
+use sqlx::any::AnyPoolOptions;
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
@@ -7,13 +6,14 @@ async fn main() -> anyhow::Result<()> {
     let password = "";
     let host = "";
     let database = "";
-    // USing sqlx: https://github.com/launchbadge/sqlx
-    let connection_string = format!("mssq://{}:{}@{}/{}", user, password, host, database);
-    let pool = AnyPoolOptions::new()
+    let database_type = "";
+    let connection_string = format!(
+        "{}://{}:{}@{}/{}",
+        database_type, user, password, host, database
+    );
+    let _ = AnyPoolOptions::new()
         .max_connections(20)
         .connect(&connection_string)
         .await?;
-    
-    // upload_to_db::upload_file_bulk(&pool, &"".to_owned(), &"".to_owned(), None, "".to_owned()).await?;
     Ok(())
 }