Re-enable empty table dump for table idxs to make sense, add custom e…

…rror when compression format is unknown, used to silently ignore

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@guilledk/arrowbatch-nodejs",
-  "version": "1.0.0-rc7",
+  "version": "1.0.0-rc8",
   "description": "Arrow Batch Storage protocol",
   "main": "./build/index.js",
   "type": "module",

src/writer/worker.ts

@@ -107,9 +107,6 @@ function flush(msg: WriterControlRequest) {
      *     - unfinished: boolean -> is this a .wip or not?
      *     - writeDir: string -> bucket dir path
      */
-    if (intermediateSize == 0)
-        return;
-
     const fileName = `${alias ?? tableName}.ab${msg.params.unfinished ? '.wip' : ''}`;
     const currentFile = path.join(msg.params.writeDir, fileName);
 
@@ -175,6 +172,9 @@ function flush(msg: WriterControlRequest) {
                 });
                 break;
             }
+            default: {
+                throw new Error(`Unknown compression format ${compression}`);
+            }
         }
     });
 }