Support writing to dynamic table if stream source is table. Otherwise…

…, use UDTF to stream to table.

Signed-off-by: sfc-gh-mvashishtha <mahesh.vashishtha@snowflake.com>

snowpark_streaming_demo.py

@@ -23,16 +23,32 @@ def generate_json_data():
 
 session = Session.builder.create()
 
+STATIC_TABLE_NAME = "static_df"
+
+SIMULATED_STREAM_DATA_NAME = "static_df2"
+
 # Create static dataframe
 session.create_dataframe(
     pd.DataFrame(
         {
-            'KEY': [str(i) for i in range(10)],
-            'STATIC_VALUE': [generate_json_data() for _ in range(10)]
+            'ID': [str(i) for i in range(1000)],
+            'STATIC_VALUE': [generate_json_data() for _ in range(1000)]
+        }
+    )
+).write.save_as_table(table_name=STATIC_TABLE_NAME, mode="overwrite")
+static_df = session.table(STATIC_TABLE_NAME)
+
+# Create static dataframe 2
+data = [generate_json_data() for _ in range(10)]
+session.create_dataframe(
+    pd.DataFrame(
+        {
+            "ID": [row["id"] for row in data ],
+            "TIMESTAMP": [row["timestamp"] for row in data],
+            "NAME": [row["name"] for row in data],
         }
     )
-).write.save_as_table(table_name="static_df", mode="overwrite")
-static_df = session.table("static_df")
+).write.save_as_table(table_name=SIMULATED_STREAM_DATA_NAME, mode="overwrite")
 
 
 kafka_event_schema = StructType(
@@ -57,32 +73,48 @@ def generate_json_data():
     .load()
 )
 
-LANDING_TABLE_NAME = "dynamic_join_result";
+LANDING_TABLE_NAME = "dynamic_join_result"
 
 transformed_df = kafka_ingest_df \
     .select(col("id"), col("timestamp"), col("name")) \
     .filter(col("price") > 100.0)
 
-
-"""
-This query looks like
-
-SELECT write_stream_udf('dynamic_join_result', "id", "timestamp", "name")
-FROM   (SELECT id,
-               name,
-               price,
-               timestamp
-        FROM   ( TABLE (my_streaming_udtf('host1:port1,host2:port2', 'topic1', 1
-                        :: INT
-                 ) )))
-WHERE  ( "price" > 100.0 ) 
-"""
+assert transformed_df._stream_source == "kafka"
 
 streaming_query: AsyncJob = transformed_df \
     .writeStream \
     .toTable(LANDING_TABLE_NAME)
 
 
+# The source table is from a kafka stream, so we write the result via  UDTF.
+
+"""
+This query looks like
+
+SELECT
+    write_stream_udf('dynamic_join_result', "id", "timestamp", "name")
+FROM
+    (
+        SELECT
+            id,
+            name,
+            price,
+            timestamp
+        FROM
+            (
+                TABLE (
+                    my_streaming_udtf(
+                        'host1:port1,host2:port2',
+                        'topic1',
+                        1::INT
+                    )
+                )
+            )
+    )
+WHERE
+    ("price" > 100.0)
+"""
+
 
 streaming_query.cancel()
 
@@ -92,16 +124,68 @@ def generate_json_data():
     session
     .readStream
     .format("table")
-    .option("table_name", LANDING_TABLE_NAME)
-)
+    # TODO: Temporarily reading from another static table here because the UDTF
+    # currently doesn't produce an output table.
+    .option("table_name", SIMULATED_STREAM_DATA_NAME)
+    # .option("table_name", LANDING_TABLE_NAME)
+).load()
+
 
+complex_df = df_streamed_from_table.join(static_df, on="ID").groupBy("NAME").count()
 
-# # Write streaming dataframe to output data sink
-# sink_query = (
-#     source_df
-#     .writeStream
-#     .format("snowflake")
-#     .option("table", "<table>")
-# )
+FINAL_TABLE_NAME = "final_table"
+
+
+assert complex_df._stream_source == "table"
+
+# One source is a Snowflake table, and the other source is a static table, so
+# we write the result as a dynamic table instead of using a UDTF.
+
+"""
+The query here is:
+
+CREATE
+OR REPLACE DYNAMIC TABLE final_table LAG = '60 seconds' WAREHOUSE = NEW_WAREHOUSE REFRESH_MODE = 'incremental' AS
+SELECT
+    *
+FROM
+    (
+        SELECT
+            "NAME",
+            count(1) AS "COUNT"
+        FROM
+            (
+                SELECT
+                    *
+                FROM
+                    (
+                        (
+                            SELECT
+                                "ID" AS "ID",
+                                "TIMESTAMP" AS "TIMESTAMP",
+                                "NAME" AS "NAME"
+                            FROM
+                                static_df2
+                        ) AS SNOWPARK_LEFT
+                        INNER JOIN (
+                            SELECT
+                                "ID" AS "ID",
+                                "STATIC_VALUE" AS "STATIC_VALUE"
+                            FROM
+                                static_df
+                        ) AS SNOWPARK_RIGHT USING (ID)
+                    )
+            )
+        GROUP BY
+            "NAME"
+    )
+"""
 
-# sink_query.start()
+(
+    complex_df
+    .writeStream
+    .outputMode("append")
+    # Dynamic Tables do not support lag values under 60 second(s).
+    .trigger(processingTime='60 seconds')
+    .toTable(FINAL_TABLE_NAME)
+)