Adding changes for Flaml Sklearn integration (#1361)

Flaml provides support for Sklearn models like Random Forests, KNN,
Extra Trees Regressor, and Logistic Regression with regularization. We
plan to integrate these ML models into EVADB.
Link for Flaml documentation:
https://microsoft.github.io/FLAML/docs/Use-Cases/Task-Oriented-AutoML

---------

Co-authored-by: Jineet Desai <jdesai61@gatech.edu>

evadb/configuration/constants.py

@@ -36,3 +36,5 @@
 DEFAULT_DOCUMENT_CHUNK_OVERLAP = 200
 DEFAULT_TRAIN_REGRESSION_METRIC = "rmse"
 DEFAULT_XGBOOST_TASK = "regression"
+DEFAULT_SKLEARN_TRAIN_MODEL = "rf"
+SKLEARN_SUPPORTED_MODELS = ["rf", "extra_tree", "kneighbor"]

evadb/executor/create_function_executor.py

@@ -30,9 +30,11 @@
 from evadb.catalog.models.function_io_catalog import FunctionIOCatalogEntry
 from evadb.catalog.models.function_metadata_catalog import FunctionMetadataCatalogEntry
 from evadb.configuration.constants import (
+    DEFAULT_SKLEARN_TRAIN_MODEL,
     DEFAULT_TRAIN_REGRESSION_METRIC,
     DEFAULT_TRAIN_TIME_LIMIT,
     DEFAULT_XGBOOST_TASK,
+    SKLEARN_SUPPORTED_MODELS,
     EvaDB_INSTALLATION_DIR,
 )
 from evadb.database import EvaDBDatabase
@@ -45,13 +47,12 @@
 from evadb.utils.generic_utils import (
     load_function_class_from_file,
     string_comparison_case_insensitive,
+    try_to_import_flaml_automl,
     try_to_import_ludwig,
     try_to_import_neuralforecast,
-    try_to_import_sklearn,
     try_to_import_statsforecast,
     try_to_import_torch,
     try_to_import_ultralytics,
-    try_to_import_xgboost,
 )
 from evadb.utils.logging_manager import logger
 
@@ -169,8 +170,7 @@ def handle_sklearn_function(self):
 
         Use Sklearn's regression to train models.
         """
-        try_to_import_sklearn()
-        from sklearn.linear_model import LinearRegression
+        try_to_import_flaml_automl()
 
         assert (
             len(self.children) == 1
@@ -186,13 +186,26 @@ def handle_sklearn_function(self):
         aggregated_batch.drop_column_alias()
 
         arg_map = {arg.key: arg.value for arg in self.node.metadata}
-        model = LinearRegression()
-        Y = aggregated_batch.frames[arg_map["predict"]]
-        aggregated_batch.frames.drop([arg_map["predict"]], axis=1, inplace=True)
+        from flaml import AutoML
+
+        model = AutoML()
+        sklearn_model = arg_map.get("model", DEFAULT_SKLEARN_TRAIN_MODEL)
+        if sklearn_model not in SKLEARN_SUPPORTED_MODELS:
+            raise ValueError(
+                f"Sklearn Model {sklearn_model} provided as input is not supported."
+            )
+        settings = {
+            "time_budget": arg_map.get("time_limit", DEFAULT_TRAIN_TIME_LIMIT),
+            "metric": arg_map.get("metric", DEFAULT_TRAIN_REGRESSION_METRIC),
+            "estimator_list": [sklearn_model],
+            "task": arg_map.get("task", DEFAULT_XGBOOST_TASK),
+        }
         start_time = int(time.time())
-        model.fit(X=aggregated_batch.frames, y=Y)
+        model.fit(
+            dataframe=aggregated_batch.frames, label=arg_map["predict"], **settings
+        )
         train_time = int(time.time()) - start_time
-        score = model.score(X=aggregated_batch.frames, y=Y)
+        score = model.best_loss
         model_path = os.path.join(
             self.db.catalog().get_configuration_catalog_value("model_dir"),
             self.node.name,
@@ -232,7 +245,7 @@ def handle_xgboost_function(self):
 
         We use the Flaml AutoML model for training xgboost models.
         """
-        try_to_import_xgboost()
+        try_to_import_flaml_automl()
 
         assert (
             len(self.children) == 1

evadb/functions/sklearn.py

@@ -17,7 +17,7 @@
 import pandas as pd
 
 from evadb.functions.abstract.abstract_function import AbstractFunction
-from evadb.utils.generic_utils import try_to_import_sklearn
+from evadb.utils.generic_utils import try_to_import_flaml_automl
 
 
 class GenericSklearnModel(AbstractFunction):
@@ -26,7 +26,7 @@ def name(self) -> str:
         return "GenericSklearnModel"
 
     def setup(self, model_path: str, predict_col: str, **kwargs):
-        try_to_import_sklearn()
+        try_to_import_flaml_automl()
 
         self.model = pickle.load(open(model_path, "rb"))
         self.predict_col = predict_col

evadb/functions/xgboost.py

@@ -17,7 +17,7 @@
 import pandas as pd
 
 from evadb.functions.abstract.abstract_function import AbstractFunction
-from evadb.utils.generic_utils import try_to_import_xgboost
+from evadb.utils.generic_utils import try_to_import_flaml_automl
 
 
 class GenericXGBoostModel(AbstractFunction):
@@ -26,7 +26,7 @@ def name(self) -> str:
         return "GenericXGBoostModel"
 
     def setup(self, model_path: str, predict_col: str, **kwargs):
-        try_to_import_xgboost()
+        try_to_import_flaml_automl()
 
         self.model = pickle.load(open(model_path, "rb"))
         self.predict_col = predict_col

evadb/utils/generic_utils.py

@@ -369,39 +369,20 @@ def is_forecast_available() -> bool:
         return False
 
 
-def try_to_import_sklearn():
-    try:
-        import sklearn  # noqa: F401
-        from sklearn.linear_model import LinearRegression  # noqa: F401
-    except ImportError:
-        raise ValueError(
-            """Could not import sklearn.
-                Please install it with `pip install scikit-learn`."""
-        )
-
-
-def is_sklearn_available() -> bool:
-    try:
-        try_to_import_sklearn()
-        return True
-    except ValueError:  # noqa: E722
-        return False
-
-
-def try_to_import_xgboost():
+def try_to_import_flaml_automl():
     try:
         import flaml  # noqa: F401
         from flaml import AutoML  # noqa: F401
     except ImportError:
         raise ValueError(
-            """Could not import Flaml AutoML.
+            """Could not import Flaml AutML.
                 Please install it with `pip install "flaml[automl]"`."""
         )
 
 
-def is_xgboost_available() -> bool:
+def is_flaml_automl_available() -> bool:
     try:
-        try_to_import_xgboost()
+        try_to_import_flaml_automl()
         return True
     except ValueError:  # noqa: E722
         return False

test/integration_tests/long/test_model_train.py

@@ -116,7 +116,9 @@ def test_sklearn_regression(self):
             CREATE OR REPLACE FUNCTION PredictHouseRentSklearn FROM
             ( SELECT number_of_rooms, number_of_bathrooms, days_on_market, rental_price FROM HomeRentals )
             TYPE Sklearn
-            PREDICT 'rental_price';
+            PREDICT 'rental_price'
+            MODEL 'extra_tree'
+            METRIC 'r2';
         """
         execute_query_fetch_all(self.evadb, create_predict_function)
 

test/markers.py

@@ -20,15 +20,14 @@
 
 from evadb.utils.generic_utils import (
     is_chromadb_available,
+    is_flaml_automl_available,
     is_forecast_available,
     is_gpu_available,
     is_ludwig_available,
     is_milvus_available,
     is_pinecone_available,
     is_qdrant_available,
     is_replicate_available,
-    is_sklearn_available,
-    is_xgboost_available,
 )
 
 asyncio_skip_marker = pytest.mark.skipif(
@@ -93,11 +92,11 @@
 )
 
 sklearn_skip_marker = pytest.mark.skipif(
-    is_sklearn_available() is False, reason="Run only if sklearn is available"
+    is_flaml_automl_available() is False, reason="Run only if Flaml AutoML is available"
 )
 
 xgboost_skip_marker = pytest.mark.skipif(
-    is_xgboost_available() is False, reason="Run only if xgboost is available"
+    is_flaml_automl_available() is False, reason="Run only if Flaml AutoML is available"
 )
 
 chatgpt_skip_marker = pytest.mark.skip(