iceberg table format support for filesystem destination

.github/workflows/test_destinations.yml

@@ -77,8 +77,13 @@ jobs:
       #     key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}-redshift
 
       - name: Install dependencies
-        # if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
-        run: poetry install --no-interaction -E redshift -E postgis -E postgres -E gs -E s3 -E az -E parquet -E duckdb -E cli -E filesystem --with sentry-sdk --with pipeline,ibis -E deltalake
+        run: poetry install --no-interaction -E redshift -E postgis -E postgres -E gs -E s3 -E az -E parquet -E duckdb -E cli -E filesystem --with sentry-sdk --with pipeline,ibis -E deltalake -E pyiceberg
+
+      - name: enable certificates for azure and duckdb
+        run: sudo mkdir -p /etc/pki/tls/certs && sudo ln -s /etc/ssl/certs/ca-certificates.crt /etc/pki/tls/certs/ca-bundle.crt
+
+      - name: Upgrade sqlalchemy
+        run: poetry run pip install sqlalchemy==2.0.18  # minimum version required by `pyiceberg`
 
       - name: create secrets.toml
         run: pwd && echo "$DLT_SECRETS_TOML" > tests/.dlt/secrets.toml

.github/workflows/test_local_destinations.yml

@@ -95,7 +95,10 @@ jobs:
           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}-local-destinations
 
       - name: Install dependencies
-        run: poetry install --no-interaction -E postgres -E postgis -E duckdb -E parquet -E filesystem -E cli -E weaviate -E qdrant -E sftp --with sentry-sdk --with pipeline,ibis -E deltalake
+        run: poetry install --no-interaction -E postgres -E postgis -E duckdb -E parquet -E filesystem -E cli -E weaviate -E qdrant -E sftp --with sentry-sdk --with pipeline,ibis -E deltalake -E pyiceberg
+
+      - name: Upgrade sqlalchemy
+        run: poetry run pip install sqlalchemy==2.0.18  # minimum version required by `pyiceberg`
 
       - name: Start SFTP server
         run: docker compose -f "tests/load/filesystem_sftp/docker-compose.yml" up -d

Makefile

@@ -44,7 +44,7 @@ has-poetry:
 	poetry --version
 
 dev: has-poetry
-	poetry install --all-extras --with docs,providers,pipeline,sources,sentry-sdk,airflow
+	poetry install --all-extras --with docs,providers,pipeline,sources,sentry-sdk
 
 lint:
 	./tools/check-package.sh

dlt/cli/source_detection.py

@@ -29,8 +29,7 @@ def find_call_arguments_to_replace(
                     if not isinstance(dn_node, ast.Constant) or not isinstance(dn_node.value, str):
                         raise CliCommandInnerException(
                             "init",
-                            f"The pipeline script {init_script_name} must pass the {t_arg_name} as"
-                            f" string to '{arg_name}' function in line {dn_node.lineno}",
+                            f"The pipeline script {init_script_name} must pass the {t_arg_name} as string to '{arg_name}' function in line {dn_node.lineno}",  # type: ignore[attr-defined]
                         )
                     else:
                         transformed_nodes.append((dn_node, ast.Constant(value=t_value, kind=None)))

dlt/common/configuration/specs/aws_credentials.py

@@ -8,6 +8,7 @@
     CredentialsWithDefault,
     configspec,
 )
+from dlt.common.configuration.specs.mixins import WithObjectStoreRsCredentials, WithPyicebergConfig
 from dlt.common.configuration.specs.exceptions import (
     InvalidBoto3Session,
     ObjectStoreRsCredentialsException,
@@ -16,7 +17,9 @@
 
 
 @configspec
-class AwsCredentialsWithoutDefaults(CredentialsConfiguration):
+class AwsCredentialsWithoutDefaults(
+    CredentialsConfiguration, WithObjectStoreRsCredentials, WithPyicebergConfig
+):
     # credentials without boto implementation
     aws_access_key_id: str = None
     aws_secret_access_key: TSecretStrValue = None
@@ -77,6 +80,16 @@ def to_object_store_rs_credentials(self) -> Dict[str, str]:
 
         return creds
 
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        return {
+            "s3.access-key-id": self.aws_access_key_id,
+            "s3.secret-access-key": self.aws_secret_access_key,
+            "s3.session-token": self.aws_session_token,
+            "s3.region": self.region_name,
+            "s3.endpoint": self.endpoint_url,
+            "s3.connect-timeout": 300,
+        }
+
 
 @configspec
 class AwsCredentials(AwsCredentialsWithoutDefaults, CredentialsWithDefault):

dlt/common/configuration/specs/azure_credentials.py

@@ -8,14 +8,15 @@
     CredentialsWithDefault,
     configspec,
 )
+from dlt.common.configuration.specs.mixins import WithObjectStoreRsCredentials, WithPyicebergConfig
 from dlt import version
 from dlt.common.utils import without_none
 
 _AZURE_STORAGE_EXTRA = f"{version.DLT_PKG_NAME}[az]"
 
 
 @configspec
-class AzureCredentialsBase(CredentialsConfiguration):
+class AzureCredentialsBase(CredentialsConfiguration, WithObjectStoreRsCredentials):
     azure_storage_account_name: str = None
     azure_account_host: Optional[str] = None
     """Alternative host when accessing blob storage endpoint ie. my_account.dfs.core.windows.net"""
@@ -32,7 +33,7 @@ def to_object_store_rs_credentials(self) -> Dict[str, str]:
 
 
 @configspec
-class AzureCredentialsWithoutDefaults(AzureCredentialsBase):
+class AzureCredentialsWithoutDefaults(AzureCredentialsBase, WithPyicebergConfig):
     """Credentials for Azure Blob Storage, compatible with adlfs"""
 
     azure_storage_account_key: Optional[TSecretStrValue] = None
@@ -49,6 +50,13 @@ def to_adlfs_credentials(self) -> Dict[str, Any]:
             account_host=self.azure_account_host,
         )
 
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        return {
+            "adlfs.account-name": self.azure_storage_account_name,
+            "adlfs.account-key": self.azure_storage_account_key,
+            "adlfs.sas-token": self.azure_storage_sas_token,
+        }
+
     def create_sas_token(self) -> None:
         try:
             from azure.storage.blob import generate_account_sas, ResourceTypes
@@ -72,7 +80,7 @@ def on_partial(self) -> None:
 
 
 @configspec
-class AzureServicePrincipalCredentialsWithoutDefaults(AzureCredentialsBase):
+class AzureServicePrincipalCredentialsWithoutDefaults(AzureCredentialsBase, WithPyicebergConfig):
     azure_tenant_id: str = None
     azure_client_id: str = None
     azure_client_secret: TSecretStrValue = None
@@ -86,6 +94,14 @@ def to_adlfs_credentials(self) -> Dict[str, Any]:
             client_secret=self.azure_client_secret,
         )
 
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        return {
+            "adlfs.account-name": self.azure_storage_account_name,
+            "adlfs.tenant-id": self.azure_tenant_id,
+            "adlfs.client-id": self.azure_client_id,
+            "adlfs.client-secret": self.azure_client_secret,
+        }
+
 
 @configspec
 class AzureCredentials(AzureCredentialsWithoutDefaults, CredentialsWithDefault):

dlt/common/configuration/specs/base_configuration.py

@@ -359,7 +359,7 @@ def _get_resolvable_dataclass_fields(cls) -> Iterator[TDtcField]:
     def get_resolvable_fields(cls) -> Dict[str, type]:
         """Returns a mapping of fields to their type hints. Dunders should not be resolved and are not returned"""
         return {
-            f.name: eval(f.type) if isinstance(f.type, str) else f.type  # type: ignore[arg-type]
+            f.name: eval(f.type) if isinstance(f.type, str) else f.type
             for f in cls._get_resolvable_dataclass_fields()
         }
 

dlt/common/configuration/specs/config_providers_context.py

@@ -1,5 +1,4 @@
 import contextlib
-import dataclasses
 import io
 from typing import ClassVar, List
 
@@ -8,10 +7,6 @@
     ConfigProvider,
     ContextProvider,
 )
-from dlt.common.configuration.specs.base_configuration import (
-    ContainerInjectableContext,
-    NotResolved,
-)
 from dlt.common.configuration.specs import (
     GcpServiceAccountCredentials,
     BaseConfiguration,
@@ -137,7 +132,7 @@ def _airflow_providers() -> List[ConfigProvider]:
             # check if we are in task context and provide more info
             from airflow.operators.python import get_current_context  # noqa
 
-            ti: TaskInstance = get_current_context()["ti"]  # type: ignore
+            ti: TaskInstance = get_current_context()["ti"]  # type: ignore[assignment,unused-ignore]
 
         # log outside of stderr/out redirect
         if secrets_toml_var is None:

dlt/common/configuration/specs/exceptions.py

@@ -72,3 +72,7 @@ def __init__(self, spec: Type[Any], native_value: Any):
 
 class ObjectStoreRsCredentialsException(ConfigurationException):
     pass
+
+
+class UnsupportedAuthenticationMethodException(ConfigurationException):
+    pass

dlt/common/configuration/specs/gcp_credentials.py

@@ -11,7 +11,9 @@
     InvalidGoogleServicesJson,
     NativeValueError,
     OAuth2ScopesRequired,
+    UnsupportedAuthenticationMethodException,
 )
+from dlt.common.configuration.specs.mixins import WithObjectStoreRsCredentials, WithPyicebergConfig
 from dlt.common.exceptions import MissingDependencyException
 from dlt.common.typing import DictStrAny, TSecretStrValue, StrAny
 from dlt.common.configuration.specs.base_configuration import (
@@ -23,7 +25,7 @@
 
 
 @configspec
-class GcpCredentials(CredentialsConfiguration):
+class GcpCredentials(CredentialsConfiguration, WithObjectStoreRsCredentials, WithPyicebergConfig):
     token_uri: Final[str] = dataclasses.field(
         default="https://oauth2.googleapis.com/token", init=False, repr=False, compare=False
     )
@@ -126,6 +128,12 @@ def to_native_credentials(self) -> Any:
         else:
             return ServiceAccountCredentials.from_service_account_info(self)
 
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        raise UnsupportedAuthenticationMethodException(
+            "Service Account authentication not supported with `iceberg` table format. Use OAuth"
+            " authentication instead."
+        )
+
     def __str__(self) -> str:
         return f"{self.client_email}@{self.project_id}"
 
@@ -176,11 +184,19 @@ def to_native_representation(self) -> str:
         return json.dumps(self._info_dict())
 
     def to_object_store_rs_credentials(self) -> Dict[str, str]:
-        raise NotImplementedError(
-            "`object_store` Rust crate does not support OAuth for GCP credentials. Reference:"
-            " https://docs.rs/object_store/latest/object_store/gcp."
+        raise UnsupportedAuthenticationMethodException(
+            "OAuth authentication not supported with `delta` table format. Use Service Account or"
+            " Application Default Credentials authentication instead."
         )
 
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        self.auth()
+        return {
+            "gcs.project-id": self.project_id,
+            "gcs.oauth2.token": self.token,
+            "gcs.oauth2.token-expires-at": (pendulum.now().timestamp() + 60) * 1000,
+        }
+
     def auth(self, scopes: Union[str, List[str]] = None, redirect_url: str = None) -> None:
         if not self.refresh_token:
             self.add_scopes(scopes)
@@ -313,6 +329,12 @@ def to_native_credentials(self) -> Any:
         else:
             return super().to_native_credentials()
 
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        raise UnsupportedAuthenticationMethodException(
+            "Application Default Credentials authentication not supported with `iceberg` table"
+            " format. Use OAuth authentication instead."
+        )
+
 
 @configspec
 class GcpServiceAccountCredentials(
@@ -334,3 +356,9 @@ def parse_native_representation(self, native_value: Any) -> None:
         except NativeValueError:
             pass
         GcpOAuthCredentialsWithoutDefaults.parse_native_representation(self, native_value)
+
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        if self.has_default_credentials():
+            return GcpDefaultCredentials.to_pyiceberg_fileio_config(self)
+        else:
+            return GcpOAuthCredentialsWithoutDefaults.to_pyiceberg_fileio_config(self)

dlt/common/configuration/specs/mixins.py

@@ -0,0 +1,24 @@
+from typing import Dict, Any
+from abc import abstractmethod, ABC
+
+
+class WithObjectStoreRsCredentials(ABC):
+    @abstractmethod
+    def to_object_store_rs_credentials(self) -> Dict[str, Any]:
+        """Returns credentials dictionary for object_store Rust crate.
+
+        Can be used for libraries that build on top of the object_store crate, such as `deltalake`.
+
+        https://docs.rs/object_store/latest/object_store/
+        """
+        pass
+
+
+class WithPyicebergConfig(ABC):
+    @abstractmethod
+    def to_pyiceberg_fileio_config(self) -> Dict[str, Any]:
+        """Returns `pyiceberg` FileIO configuration dictionary.
+
+        https://py.iceberg.apache.org/configuration/#fileio
+        """
+        pass

dlt/common/data_writers/buffered.py

@@ -242,7 +242,7 @@ def _flush_items(self, allow_empty_file: bool = False) -> None:
                 if self.writer_spec.is_binary_format:
                     self._file = self.open(self._file_name, "wb")  # type: ignore
                 else:
-                    self._file = self.open(self._file_name, "wt", encoding="utf-8", newline="")  # type: ignore
+                    self._file = self.open(self._file_name, "wt", encoding="utf-8", newline="")
                 self._writer = self.writer_cls(self._file, caps=self._caps)  # type: ignore[assignment]
                 self._writer.write_header(self._current_columns)
             # write buffer

dlt/common/destination/utils.py

@@ -38,7 +38,7 @@ def verify_schema_capabilities(
     exception_log: List[Exception] = []
     # combined casing function
     case_identifier = lambda ident: capabilities.casefold_identifier(
-        (str if capabilities.has_case_sensitive_identifiers else str.casefold)(ident)  # type: ignore
+        (str if capabilities.has_case_sensitive_identifiers else str.casefold)(ident)
     )
     table_name_lookup: DictStrStr = {}
     # name collision explanation

dlt/common/libs/deltalake.py

@@ -10,6 +10,7 @@
 from dlt.common.exceptions import MissingDependencyException
 from dlt.common.storages import FilesystemConfiguration
 from dlt.common.utils import assert_min_pkg_version
+from dlt.common.configuration.specs.mixins import WithObjectStoreRsCredentials
 from dlt.destinations.impl.filesystem.filesystem import FilesystemClient
 
 try:
@@ -191,10 +192,9 @@ def get_delta_tables(
 
 def _deltalake_storage_options(config: FilesystemConfiguration) -> Dict[str, str]:
     """Returns dict that can be passed as `storage_options` in `deltalake` library."""
-    creds = {}  # type: ignore
+    creds = {}
     extra_options = {}
-    # TODO: create a mixin with to_object_store_rs_credentials for a proper discovery
-    if hasattr(config.credentials, "to_object_store_rs_credentials"):
+    if isinstance(config.credentials, WithObjectStoreRsCredentials):
         creds = config.credentials.to_object_store_rs_credentials()
     if config.deltalake_storage_options is not None:
         extra_options = config.deltalake_storage_options