Fix: Syncs shows "0 records" synced when using incremental sync (#282)

Author: avirajsingh7

airbyte/sources/base.py

@@ -4,7 +4,7 @@
 import json
 import warnings
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, cast
+from typing import TYPE_CHECKING, Any, Optional, cast
 
 import jsonschema
 import pendulum
@@ -222,6 +222,14 @@ def get_available_streams(self) -> list[str]:
         """Get the available streams from the spec."""
         return [s.name for s in self.discovered_catalog.streams]
 
+    def _get_incremental_stream_names(self) -> list[str]:
+        """Get the name of streams that support incremental sync."""
+        return [
+            stream.name
+            for stream in self.discovered_catalog.streams
+            if SyncMode.incremental in stream.supported_sync_modes
+        ]
+
     def _get_spec(self, *, force_refresh: bool = False) -> ConnectorSpecification:
         """Call spec on the connector.
 
@@ -624,6 +632,19 @@ def _log_sync_start(
             event_type=EventType.SYNC,
         )
 
+    def _log_incremental_streams(
+        self,
+        *,
+        incremental_streams: Optional[set[str]] = None,
+    ) -> None:
+        """Log the streams which are using incremental sync mode."""
+        log_message = (
+            "The following streams are currently using incremental sync:\n"
+            f"{incremental_streams}\n"
+            "To perform a full refresh, set 'force_full_refresh=True' in 'airbyte.read()' method."
+        )
+        print(log_message)
+
     def _log_stream_read_start(self, stream: str) -> None:
         print(f"Read started on stream: {stream} at {pendulum.now().format('HH:mm:ss')}...")
 
@@ -737,6 +758,17 @@ def read(
 
         self._log_sync_start(cache=cache)
 
+        # Log incremental stream if incremental streams are known
+        if state_provider and state_provider.known_stream_names:
+            # Retrieve set of the known streams support which support incremental sync
+            incremental_streams = (
+                set(self._get_incremental_stream_names())
+                & state_provider.known_stream_names
+                & set(self.get_selected_streams())
+            )
+            if incremental_streams:
+                self._log_incremental_streams(incremental_streams=incremental_streams)
+
         cache_processor = cache.get_record_processor(
             source_name=self.name,
             catalog_provider=CatalogProvider(self.configured_catalog),