feat: Add support for arrays in snowflake (feast-dev#3769)

Adds support for arrays in snowflake

Signed-off-by: john.lemmon <john.lemmon@medely.com>
Signed-off-by: Attila Toth <hello@attilatoth.dev>

sdk/python/feast/infra/offline_stores/snowflake.py

@@ -1,4 +1,5 @@
 import contextlib
+import json
 import os
 import uuid
 import warnings
@@ -51,6 +52,17 @@
 )
 from feast.repo_config import FeastConfigBaseModel, RepoConfig
 from feast.saved_dataset import SavedDatasetStorage
+from feast.types import (
+    Array,
+    Bool,
+    Bytes,
+    Float32,
+    Float64,
+    Int32,
+    Int64,
+    String,
+    UnixTimestamp,
+)
 from feast.usage import log_exceptions_and_usage
 
 try:
@@ -320,6 +332,7 @@ def query_generator() -> Iterator[str]:
             on_demand_feature_views=OnDemandFeatureView.get_requested_odfvs(
                 feature_refs, project, registry
             ),
+            feature_views=feature_views,
             metadata=RetrievalMetadata(
                 features=feature_refs,
                 keys=list(entity_schema.keys() - {entity_df_event_timestamp_col}),
@@ -398,9 +411,12 @@ def __init__(
         config: RepoConfig,
         full_feature_names: bool,
         on_demand_feature_views: Optional[List[OnDemandFeatureView]] = None,
+        feature_views: Optional[List[FeatureView]] = None,
         metadata: Optional[RetrievalMetadata] = None,
     ):
 
+        if feature_views is None:
+            feature_views = []
         if not isinstance(query, str):
             self._query_generator = query
         else:
@@ -416,6 +432,7 @@ def query_generator() -> Iterator[str]:
         self.config = config
         self._full_feature_names = full_feature_names
         self._on_demand_feature_views = on_demand_feature_views or []
+        self._feature_views = feature_views
         self._metadata = metadata
         self.export_path: Optional[str]
         if self.config.offline_store.blob_export_location:
@@ -436,6 +453,20 @@ def _to_df_internal(self, timeout: Optional[int] = None) -> pd.DataFrame:
             self.snowflake_conn, self.to_sql()
         ).fetch_pandas_all()
 
+        for feature_view in self._feature_views:
+            for feature in feature_view.features:
+                if feature.dtype in [
+                    Array(String),
+                    Array(Bytes),
+                    Array(Int32),
+                    Array(Int64),
+                    Array(UnixTimestamp),
+                    Array(Float64),
+                    Array(Float32),
+                    Array(Bool),
+                ]:
+                    df[feature.name] = [json.loads(x) for x in df[feature.name]]
+
         return df
 
     def _to_arrow_internal(self, timeout: Optional[int] = None) -> pyarrow.Table:

sdk/python/feast/infra/offline_stores/snowflake_source.py

@@ -279,12 +279,12 @@ def get_table_column_names_and_types(
                 else:
                     row["snowflake_type"] = "NUMBERwSCALE"
 
-            elif row["type_code"] in [5, 9, 10, 12]:
+            elif row["type_code"] in [5, 9, 12]:
                 error = snowflake_unsupported_map[row["type_code"]]
                 raise NotImplementedError(
                     f"The following Snowflake Data Type is not supported: {error}"
                 )
-            elif row["type_code"] in [1, 2, 3, 4, 6, 7, 8, 11, 13]:
+            elif row["type_code"] in [1, 2, 3, 4, 6, 7, 8, 10, 11, 13]:
                 row["snowflake_type"] = snowflake_type_code_map[row["type_code"]]
             else:
                 raise NotImplementedError(
@@ -305,14 +305,14 @@ def get_table_column_names_and_types(
     6: "TIMESTAMP_LTZ",
     7: "TIMESTAMP_TZ",
     8: "TIMESTAMP_NTZ",
+    10: "ARRAY",
     11: "BINARY",
     13: "BOOLEAN",
 }
 
 snowflake_unsupported_map = {
     5: "VARIANT -- Try converting to VARCHAR",
     9: "OBJECT -- Try converting to VARCHAR",
-    10: "ARRAY -- Try converting to VARCHAR",
     12: "TIME -- Try converting to VARCHAR",
 }
 

sdk/python/feast/infra/utils/snowflake/snowpark/snowflake_python_udfs_creation.sql

@@ -14,6 +14,62 @@ CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_varchar_to_string_pro
   HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_varchar_to_string_proto'
   IMPORTS = ('@STAGE_HOLDER/feast.zip');
 
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_bytes_to_list_bytes_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_bytes_to_list_bytes_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_varchar_to_list_string_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_varchar_to_list_string_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_number_to_list_int32_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_number_to_list_int32_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_number_to_list_int64_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_number_to_list_int64_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_float_to_list_double_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_float_to_list_double_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_boolean_to_list_bool_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_boolean_to_list_bool_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
+CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_array_timestamp_to_list_unix_timestamp_proto(df ARRAY)
+    RETURNS BINARY
+    LANGUAGE PYTHON
+    RUNTIME_VERSION = '3.8'
+    PACKAGES = ('protobuf', 'pandas')
+    HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_timestamp_to_list_unix_timestamp_proto'
+    IMPORTS = ('@STAGE_HOLDER/feast.zip');
+
 CREATE FUNCTION IF NOT EXISTS feast_PROJECT_NAME_snowflake_number_to_int32_proto(df NUMBER)
   RETURNS BINARY
   LANGUAGE PYTHON

sdk/python/feast/infra/utils/snowflake/snowpark/snowflake_udfs.py

@@ -1,6 +1,7 @@
 import sys
 from binascii import unhexlify
 
+import numpy as np
 import pandas
 from _snowflake import vectorized
 
@@ -59,6 +60,180 @@ def feast_snowflake_varchar_to_string_proto(df):
     return df
 
 
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_bytes_to_list_bytes_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_bytes_to_list_bytes_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+# ValueType.STRING_LIST = 12
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_bytes_to_list_bytes_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    # Sometimes bytes come in as strings so we need to convert back to float
+    numpy_arrays = np.asarray(df[0].to_list()).astype(bytes)
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(numpy_arrays, ValueType.BYTES_LIST),
+        )
+    )
+    return df
+
+
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_varchar_to_list_string_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_varchar_to_list_string_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+
+
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_varchar_to_list_string_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(df[0].to_numpy(), ValueType.STRING_LIST),
+        )
+    )
+    return df
+
+
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_number_to_list_int32_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_number_to_list_int32_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+
+
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_number_to_list_int32_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(df[0].to_numpy(), ValueType.INT32_LIST),
+        )
+    )
+    return df
+
+
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_number_to_list_int64_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_number_to_list_int64_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+
+
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_number_to_list_int64_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(df[0].to_numpy(), ValueType.INT64_LIST),
+        )
+    )
+    return df
+
+
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_float_to_list_double_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_float_to_list_double_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+
+
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_float_to_list_double_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    numpy_arrays = np.asarray(df[0].to_list()).astype(float)
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(numpy_arrays, ValueType.DOUBLE_LIST),
+        )
+    )
+    return df
+
+
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_boolean_to_list_bool_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_boolean_to_list_bool_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+
+
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_boolean_to_list_bool_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(df[0].to_numpy(), ValueType.BOOL_LIST),
+        )
+    )
+    return df
+
+
+"""
+CREATE OR REPLACE FUNCTION feast_snowflake_array_timestamp_to_list_unix_timestamp_proto(df ARRAY)
+  RETURNS BINARY
+  LANGUAGE PYTHON
+  RUNTIME_VERSION = '3.8'
+  PACKAGES = ('protobuf', 'pandas')
+  HANDLER = 'feast.infra.utils.snowflake.snowpark.snowflake_udfs.feast_snowflake_array_timestamp_to_list_unix_timestamp_proto'
+  IMPORTS = ('@feast_stage/feast.zip');
+"""
+
+
+@vectorized(input=pandas.DataFrame)
+def feast_snowflake_array_timestamp_to_list_unix_timestamp_proto(df):
+    sys._xoptions["snowflake_partner_attribution"].append("feast")
+
+    numpy_arrays = np.asarray(df[0].to_list()).astype(np.datetime64)
+
+    df = list(
+        map(
+            ValueProto.SerializeToString,
+            python_values_to_proto_values(numpy_arrays, ValueType.UNIX_TIMESTAMP_LIST),
+        )
+    )
+    return df
+
+
 """
 CREATE OR REPLACE FUNCTION feast_snowflake_number_to_int32_proto(df NUMBER)
   RETURNS BINARY

sdk/python/feast/type_map.py

@@ -680,6 +680,14 @@ def _convert_value_name_to_snowflake_udf(value_name: str, project_name: str) ->
         "FLOAT": f"feast_{project_name}_snowflake_float_to_double_proto",
         "BOOL": f"feast_{project_name}_snowflake_boolean_to_bool_proto",
         "UNIX_TIMESTAMP": f"feast_{project_name}_snowflake_timestamp_to_unix_timestamp_proto",
+        "BYTES_LIST": f"feast_{project_name}_snowflake_array_bytes_to_list_bytes_proto",
+        "STRING_LIST": f"feast_{project_name}_snowflake_array_varchar_to_list_string_proto",
+        "INT32_LIST": f"feast_{project_name}_snowflake_array_number_to_list_int32_proto",
+        "INT64_LIST": f"feast_{project_name}_snowflake_array_number_to_list_int64_proto",
+        "DOUBLE_LIST": f"feast_{project_name}_snowflake_array_float_to_list_double_proto",
+        "FLOAT_LIST": f"feast_{project_name}_snowflake_array_float_to_list_double_proto",
+        "BOOL_LIST": f"feast_{project_name}_snowflake_array_boolean_to_list_bool_proto",
+        "UNIX_TIMESTAMP_LIST": f"feast_{project_name}_snowflake_array_timestamp_to_list_unix_timestamp_proto",
     }
     return name_map[value_name].upper()
 

sdk/python/tests/data/data_creator.py

@@ -59,6 +59,7 @@ def get_feature_values_for_dtype(
         "int64": [1, 2, 3, 4, 5],
         "float": [1.0, None, 3.0, 4.0, 5.0],
         "string": ["1", None, "3", "4", "5"],
+        "bytes": [b"1", None, b"3", b"4", b"5"],
         "bool": [True, None, False, True, False],
         "datetime": [
             datetime(1980, 1, 1),

sdk/python/tests/integration/feature_repos/repo_configuration.py

@@ -83,8 +83,8 @@
     "password": os.getenv("SNOWFLAKE_CI_PASSWORD", ""),
     "role": os.getenv("SNOWFLAKE_CI_ROLE", ""),
     "warehouse": os.getenv("SNOWFLAKE_CI_WAREHOUSE", ""),
-    "database": "FEAST",
-    "schema": "ONLINE",
+    "database": os.getenv("SNOWFLAKE_CI_DATABASE", "FEAST"),
+    "schema": os.getenv("SNOWFLAKE_CI_SCHEMA_ONLINE", "ONLINE"),
 }
 
 BIGTABLE_CONFIG = {