fix(ingest/snowflake): handle dots in snowflake table names

metadata-ingestion/src/datahub/ingestion/source/snowflake/snowflake_utils.py

@@ -1,6 +1,6 @@
 import abc
 from functools import cached_property
-from typing import ClassVar, Literal, Optional, Tuple
+from typing import ClassVar, List, Literal, Optional, Tuple
 
 from datahub.configuration.pattern_utils import is_schema_allowed
 from datahub.emitter.mce_builder import make_dataset_urn_with_platform_instance
@@ -184,6 +184,46 @@ def _is_sys_table(table_name: str) -> bool:
     return table_name.lower().startswith("sys$")
 
 
+def _split_qualified_name(qualified_name: str) -> List[str]:
+    """
+    Split a qualified name into its constituent parts.
+
+    >>> _split_qualified_name("db.my_schema.my_table")
+    ['db', 'my_schema', 'my_table']
+    >>> _split_qualified_name('"db"."my_schema"."my_table"')
+    ['db', 'my_schema', 'my_table']
+    >>> _split_qualified_name('TEST_DB.TEST_SCHEMA."TABLE.WITH.DOTS"')
+    ['TEST_DB', 'TEST_SCHEMA', 'TABLE.WITH.DOTS']
+    >>> _split_qualified_name('TEST_DB."SCHEMA.WITH.DOTS".MY_TABLE')
+    ['TEST_DB', 'SCHEMA.WITH.DOTS', 'MY_TABLE']
+    """
+
+    # Fast path - no quotes.
+    if '"' not in qualified_name:
+        return qualified_name.split(".")
+
+    # First pass - split on dots that are not inside quotes.
+    in_quote = False
+    parts: List[List[str]] = [[]]
+    for char in qualified_name:
+        if char == '"':
+            in_quote = not in_quote
+        elif char == "." and not in_quote:
+            parts.append([])
+        else:
+            parts[-1].append(char)
+
+    # Second pass - remove outer pairs of quotes.
+    result = []
+    for part in parts:
+        if len(part) > 2 and part[0] == '"' and part[-1] == '"':
+            part = part[1:-1]
+
+        result.append("".join(part))
+
+    return result
+
+
 # Qualified Object names from snowflake audit logs have quotes for for snowflake quoted identifiers,
 # For example "test-database"."test-schema".test_table
 # whereas we generate urns without quotes even for quoted identifiers for backward compatibility
@@ -192,7 +232,7 @@ def _is_sys_table(table_name: str) -> bool:
 def _cleanup_qualified_name(
     qualified_name: str, structured_reporter: SourceReport
 ) -> str:
-    name_parts = qualified_name.split(".")
+    name_parts = _split_qualified_name(qualified_name)
     if len(name_parts) != 3:
         if not _is_sys_table(qualified_name):
             structured_reporter.info(
@@ -203,9 +243,9 @@ def _cleanup_qualified_name(
             )
         return qualified_name.replace('"', "")
     return _combine_identifier_parts(
-        db_name=name_parts[0].strip('"'),
-        schema_name=name_parts[1].strip('"'),
-        table_name=name_parts[2].strip('"'),
+        db_name=name_parts[0],
+        schema_name=name_parts[1],
+        table_name=name_parts[2],
     )
 
 

metadata-ingestion/src/datahub/testing/doctest.py

@@ -0,0 +1,12 @@
+import doctest
+from types import ModuleType
+
+
+def assert_doctest(module: ModuleType) -> None:
+    result = doctest.testmod(
+        module,
+        raise_on_error=True,
+        verbose=True,
+    )
+    if result.attempted == 0:
+        raise ValueError(f"No doctests found in {module.__name__}")

metadata-ingestion/tests/integration/git/test_git_clone.py

@@ -1,12 +1,13 @@
-import doctest
 import os
 
 import pytest
 from pydantic import SecretStr
 
+import datahub.ingestion.source.git.git_import
 from datahub.configuration.common import ConfigurationWarning
 from datahub.configuration.git import GitInfo, GitReference
 from datahub.ingestion.source.git.git_import import GitClone
+from datahub.testing.doctest import assert_doctest
 
 LOOKML_TEST_SSH_KEY = os.environ.get("DATAHUB_LOOKML_GIT_TEST_SSH_KEY")
 
@@ -82,15 +83,8 @@ def test_github_branch():
     assert config.branch_for_clone == "main"
 
 
-def test_sanitize_repo_url():
-    import datahub.ingestion.source.git.git_import
-
-    assert (
-        doctest.testmod(
-            datahub.ingestion.source.git.git_import, raise_on_error=True
-        ).attempted
-        == 3
-    )
+def test_sanitize_repo_url() -> None:
+    assert_doctest(datahub.ingestion.source.git.git_import)
 
 
 def test_git_clone_public(tmp_path):

metadata-ingestion/tests/unit/sagemaker/test_sagemaker_source.py

@@ -3,6 +3,7 @@
 from botocore.stub import Stubber
 from freezegun import freeze_time
 
+import datahub.ingestion.source.aws.sagemaker_processors.models
 from datahub.ingestion.api.common import PipelineContext
 from datahub.ingestion.sink.file import write_metadata_file
 from datahub.ingestion.source.aws.sagemaker import (
@@ -13,6 +14,7 @@
     job_type_to_info,
     job_types,
 )
+from datahub.testing.doctest import assert_doctest
 from tests.test_helpers import mce_helpers
 from tests.unit.sagemaker.test_sagemaker_source_stubs import (
     describe_endpoint_response_1,
@@ -243,16 +245,5 @@ def test_sagemaker_ingest(tmp_path, pytestconfig):
     )
 
 
-def test_doc_test_run():
-    import doctest
-
-    import datahub.ingestion.source.aws.sagemaker_processors.models
-
-    assert (
-        doctest.testmod(
-            datahub.ingestion.source.aws.sagemaker_processors.models,
-            raise_on_error=True,
-            verbose=True,
-        ).attempted
-        == 1
-    )
+def test_doc_test_run() -> None:
+    assert_doctest(datahub.ingestion.source.aws.sagemaker_processors.models)

metadata-ingestion/tests/unit/snowflake/test_snowflake_source.py

@@ -4,6 +4,7 @@
 import pytest
 from pydantic import ValidationError
 
+import datahub.ingestion.source.snowflake.snowflake_utils
 from datahub.configuration.common import AllowDenyPattern
 from datahub.configuration.pattern_utils import UUID_REGEX
 from datahub.ingestion.api.source import SourceCapability
@@ -26,6 +27,7 @@
 )
 from datahub.ingestion.source.snowflake.snowflake_utils import SnowsightUrlBuilder
 from datahub.ingestion.source.snowflake.snowflake_v2 import SnowflakeV2Source
+from datahub.testing.doctest import assert_doctest
 from tests.test_helpers import test_connection_helpers
 
 default_oauth_dict: Dict[str, Any] = {
@@ -658,3 +660,7 @@ def test_create_snowsight_base_url_ap_northeast_1():
     ).snowsight_base_url
 
     assert result == "https://app.snowflake.com/ap-northeast-1.aws/account_locator/"
+
+
+def test_snowflake_utils() -> None:
+    assert_doctest(datahub.ingestion.source.snowflake.snowflake_utils)

metadata-ingestion/tests/unit/test_dbt_source.py

@@ -1,4 +1,3 @@
-import doctest
 from datetime import timedelta
 from typing import Dict, List, Union
 from unittest import mock
@@ -22,6 +21,7 @@
     OwnershipSourceTypeClass,
     OwnershipTypeClass,
 )
+from datahub.testing.doctest import assert_doctest
 
 
 def create_owners_list_from_urn_list(
@@ -442,7 +442,7 @@ def test_dbt_cloud_config_with_defined_metadata_endpoint():
 
 
 def test_infer_metadata_endpoint() -> None:
-    assert doctest.testmod(dbt_cloud, raise_on_error=True).attempted > 0
+    assert_doctest(dbt_cloud)
 
 
 def test_dbt_time_parsing() -> None:

metadata-ingestion/tests/unit/utilities/test_utilities.py

@@ -1,9 +1,10 @@
-import doctest
 import re
 from typing import List
 
+import datahub.utilities.logging_manager
 from datahub.sql_parsing.schema_resolver import SchemaResolver
 from datahub.sql_parsing.sqlglot_lineage import sqlglot_lineage
+from datahub.testing.doctest import assert_doctest
 from datahub.utilities.delayed_iter import delayed_iter
 from datahub.utilities.is_pytest import is_pytest_running
 from datahub.utilities.urns.dataset_urn import DatasetUrn
@@ -328,15 +329,8 @@ def test_sqllineage_sql_parser_tables_with_special_names():
     assert sorted(SqlLineageSQLParser(sql_query).get_columns()) == expected_columns
 
 
-def test_logging_name_extraction():
-    import datahub.utilities.logging_manager
-
-    assert (
-        doctest.testmod(
-            datahub.utilities.logging_manager, raise_on_error=True
-        ).attempted
-        > 0
-    )
+def test_logging_name_extraction() -> None:
+    assert_doctest(datahub.utilities.logging_manager)
 
 
 def test_is_pytest_running() -> None: