feat: Split from a source stream

springql-core/src/stream_engine/autonomous_executor/task/source_task.rs

@@ -48,42 +48,39 @@ impl SourceTask {
     ) -> Result<MetricsUpdateByTaskExecution> {
         let stopwatch = WallClockStopwatch::start();
 
-        assert_eq!(
-            context.output_queues().len(),
-            1,
-            "source task must have 1 output queue"
-        );
-
-        let out_qid = context
-            .output_queues()
-            .first()
-            .expect("source task must have 1 output queue")
-            .clone();
-        let out_queue_metrics = self.put_row_into(out_qid, context);
+        let out_queue_metrics_seq = match self.collect_next(context) {
+            Some(row) => {
+                context
+                    .output_queues()
+                    .into_iter()
+                    .map(|out_qid| self.put_row_into(out_qid, row.clone(), context)) // remove None metrics
+                    .collect::<Vec<OutQueueMetricsUpdateByTask>>()
+            }
+            None => vec![],
+        };
 
         let execution_time = stopwatch.stop();
 
         let task_metrics = TaskMetricsUpdateByTask::new(context.task(), execution_time);
         Ok(MetricsUpdateByTaskExecution::new(
             task_metrics,
             vec![],
-            out_queue_metrics.map_or_else(Vec::new, |o| vec![o]),
+            out_queue_metrics_seq,
         ))
     }
 
     fn put_row_into(
         &self,
         queue_id: QueueId,
+        row: Row,
         context: &TaskContext,
-    ) -> Option<OutQueueMetricsUpdateByTask> {
-        let row = self.collect_next(context)?;
+    ) -> OutQueueMetricsUpdateByTask {
         let repos = context.repos();
 
-        let out_queue_metrics = match queue_id {
+        match queue_id {
             QueueId::Row(queue_id) => self.put_row_into_row_queue(row, queue_id, repos),
             QueueId::Window(queue_id) => self.put_row_into_window_queue(row, queue_id, repos),
-        };
-        Some(out_queue_metrics)
+        }
     }
     fn put_row_into_row_queue(
         &self,

springql-core/tests/feat_pipeline.rs

@@ -0,0 +1,99 @@
+// This file is part of https://github.com/SpringQL/SpringQL which is licensed under MIT OR Apache-2.0. See file LICENSE-MIT or LICENSE-APACHE for full license details.
+
+mod test_support;
+
+use pretty_assertions::assert_eq;
+use serde_json::json;
+use springql_core::low_level_rs::*;
+use springql_foreign_service::source::source_input::ForeignSourceInput;
+use springql_foreign_service::source::ForeignSource;
+use springql_test_logger::setup_test_logger;
+
+use crate::test_support::apply_ddls;
+
+/// See: <https://github.com/SpringQL/SpringQL/issues/132>
+#[test]
+fn test_feat_split_from_source() {
+    setup_test_logger();
+
+    let json1 = json!({
+        "ts": "2020-01-01 00:00:00.000000000",
+        "c": 42,
+    });
+    let source_input = vec![json1];
+
+    let test_source = ForeignSource::new().unwrap();
+
+    let ddls = vec![
+        "
+        CREATE SOURCE STREAM source_1 (
+          ts TIMESTAMP NOT NULL ROWTIME,
+          c INTEGER NOT NULL
+        );
+        "
+        .to_string(),
+        "
+        CREATE SINK STREAM sink_1 (
+          ts TIMESTAMP NOT NULL ROWTIME,
+          c_mul_10 INTEGER NOT NULL
+        );
+        "
+        .to_string(),
+        "
+        CREATE SINK STREAM sink_2 (
+          ts TIMESTAMP NOT NULL ROWTIME,
+          c_add_1 INTEGER NOT NULL
+        );
+        "
+        .to_string(),
+        "
+        CREATE PUMP pu_mul AS
+          INSERT INTO sink_1 (ts, c_mul_10)
+          SELECT STREAM source_1.ts, source_1.c * 10
+              FROM source_1;
+        "
+        .to_string(),
+        "
+        CREATE PUMP pu_add AS
+          INSERT INTO sink_2 (ts, c_add_1)
+          SELECT STREAM source_1.ts, source_1.c + 1
+              FROM source_1;
+        "
+        .to_string(),
+        "
+        CREATE SINK WRITER q_sink_1 FOR sink_1
+          TYPE IN_MEMORY_QUEUE OPTIONS (
+            NAME 'q1'
+        );
+        "
+        .to_string(),
+        "
+        CREATE SINK WRITER q_sink_2 FOR sink_2
+          TYPE IN_MEMORY_QUEUE OPTIONS (
+            NAME 'q2'
+        );
+        "
+        .to_string(),
+        format!(
+            "
+        CREATE SOURCE READER tcp_1 FOR source_1
+          TYPE NET_CLIENT OPTIONS (
+            PROTOCOL 'TCP',
+            REMOTE_HOST '{remote_host}',
+            REMOTE_PORT '{remote_port}'
+          );
+        ",
+            remote_host = test_source.host_ip(),
+            remote_port = test_source.port()
+        ),
+    ];
+
+    let pipeline = apply_ddls(&ddls, SpringConfig::default());
+    test_source.start(ForeignSourceInput::new_fifo_batch(source_input));
+
+    let row = pipeline.pop("q1").unwrap();
+    assert_eq!(row.get_not_null_by_index::<i32>(1).unwrap(), 42 * 10);
+
+    let row = pipeline.pop("q2").unwrap();
+    assert_eq!(row.get_not_null_by_index::<i32>(1).unwrap(), 42 + 1);
+}