def test_extraction_with_single_result(self):
# type: () -> None
with patch.object(SQLAlchemyExtractor, '_get_connection') as mock_connection:
connection = MagicMock()
mock_connection.return_value = connection
sql_execute = MagicMock()
connection.execute = sql_execute
table = {'schema': 'test_schema',
'name': 'test_table',
'description': 'a table for testing'}
sql_execute.return_value = [
self._union(
{'col_name': 'col_id1',
'col_type': 'bigint',
'col_description': 'description of id1',
'col_sort_order': 0}, table),
self._union(
{'col_name': 'col_id2',
'col_type': 'bigint',
'col_description': 'description of id2',
'col_sort_order': 1}, table),
self._union(
{'col_name': 'is_active',
'col_type': 'boolean',
'col_description': None,
'col_sort_order': 2}, table),
self._union(
{'col_name': 'source',
'col_type': 'varchar',
'col_description': 'description of source',
'col_sort_order': 3}, table),
self._union(
{'col_name': 'etl_created_at',
'col_type': 'timestamp',
'col_description': 'description of etl_created_at',
'col_sort_order': 4}, table),
self._union(
{'col_name': 'ds',
'col_type': 'varchar',
'col_description': None,
'col_sort_order': 5}, table)
]
extractor = HiveTableMetadataExtractor()
extractor.init(self.conf)
actual = extractor.extract()
expected = TableMetadata('hive', 'gold', 'test_schema', 'test_table', 'a table for testing',
[ColumnMetadata('col_id1', 'description of id1', 'bigint', 0),
ColumnMetadata('col_id2', 'description of id2', 'bigint', 1),
ColumnMetadata('is_active', None, 'boolean', 2),
ColumnMetadata('source', 'description of source', 'varchar', 3),
ColumnMetadata('etl_created_at', 'description of etl_created_at', 'timestamp', 4),
ColumnMetadata('ds', None, 'varchar', 5)])
self.assertEqual(expected.__repr__(), actual.__repr__())
self.assertIsNone(extractor.extract())
def _create_schema_by_table_mapping(self):
# type: () -> dict
# TODO: Make extractor generic
table_metadata_extractor = HiveTableMetadataExtractor()
table_metadata_extractor.init(
Scoped.get_scoped_conf(self._conf,
table_metadata_extractor.get_scope()))
table_to_schema = {}
table_metadata = table_metadata_extractor.extract()
while table_metadata:
# TODO: deal with collision
table_to_schema[table_metadata.name.lower(
)] = table_metadata.schema_name.lower()
table_metadata = table_metadata_extractor.extract()
return table_to_schema
def test_extraction_with_empty_query_result(self) -> None:
"""
Test Extraction with empty result from query
"""
with patch.object(SQLAlchemyExtractor, '_get_connection'):
extractor = HiveTableMetadataExtractor()
extractor.init(self.conf)
results = extractor.extract()
self.assertEqual(results, None)
def test_extraction_with_empty_query_result(self) -> None:
"""
Test Extraction with empty result from query
"""
with patch.object(SQLAlchemyExtractor, '_get_connection'), \
patch.object(HiveTableMetadataExtractor, '_choose_default_sql_stm',
return_value=HiveTableMetadataExtractor.DEFAULT_SQL_STATEMENT):
extractor = HiveTableMetadataExtractor()
extractor.init(self.conf)
results = extractor.extract()
self.assertEqual(results, None)
def test_extraction_with_multiple_result(self) -> None:
with patch.object(SQLAlchemyExtractor,
'_get_connection') as mock_connection:
connection = MagicMock()
mock_connection.return_value = connection
sql_execute = MagicMock()
connection.execute = sql_execute
table = {
'schema': 'test_schema1',
'name': 'test_table1',
'description': 'test table 1',
'is_view': 0
}
table1 = {
'schema': 'test_schema1',
'name': 'test_table2',
'description': 'test table 2',
'is_view': 0
}
table2 = {
'schema': 'test_schema2',
'name': 'test_table3',
'description': 'test table 3',
'is_view': 0
}
sql_execute.return_value = [
self._union(
{
'col_name': 'col_id1',
'col_type': 'bigint',
'col_description': 'description of col_id1',
'col_sort_order': 0,
'is_partition_col': 1
}, table),
self._union(
{
'col_name': 'col_id2',
'col_type': 'bigint',
'col_description': 'description of col_id2',
'col_sort_order': 1,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'is_active',
'col_type': 'boolean',
'col_description': None,
'col_sort_order': 2,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'source',
'col_type': 'varchar',
'col_description': 'description of source',
'col_sort_order': 3,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'etl_created_at',
'col_type': 'timestamp',
'col_description': 'description of etl_created_at',
'col_sort_order': 4,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'ds',
'col_type': 'varchar',
'col_description': None,
'col_sort_order': 5,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'col_name',
'col_type': 'varchar',
'col_description': 'description of col_name',
'col_sort_order': 0,
'is_partition_col': 0
}, table1),
self._union(
{
'col_name': 'col_name2',
'col_type': 'varchar',
'col_description': 'description of col_name2',
'col_sort_order': 1,
'is_partition_col': 0
}, table1),
self._union(
{
'col_name': 'col_id3',
'col_type': 'varchar',
'col_description': 'description of col_id3',
'col_sort_order': 0,
'is_partition_col': 0
}, table2),
self._union(
{
'col_name': 'col_name3',
'col_type': 'varchar',
'col_description': 'description of col_name3',
'col_sort_order': 1,
'is_partition_col': 0
}, table2)
]
extractor = HiveTableMetadataExtractor()
extractor.init(self.conf)
expected = TableMetadata(
'hive',
'gold',
'test_schema1',
'test_table1',
'test table 1', [
ColumnMetadata('col_id1', 'description of col_id1',
'bigint', 0, ['partition column']),
ColumnMetadata('col_id2', 'description of col_id2',
'bigint', 1),
ColumnMetadata('is_active', None, 'boolean', 2),
ColumnMetadata('source', 'description of source',
'varchar', 3),
ColumnMetadata('etl_created_at',
'description of etl_created_at',
'timestamp', 4),
ColumnMetadata('ds', None, 'varchar', 5)
],
is_view=False)
self.assertEqual(expected.__repr__(),
extractor.extract().__repr__())
expected = TableMetadata(
'hive',
'gold',
'test_schema1',
'test_table2',
'test table 2', [
ColumnMetadata('col_name', 'description of col_name',
'varchar', 0),
ColumnMetadata('col_name2', 'description of col_name2',
'varchar', 1)
],
is_view=False)
self.assertEqual(expected.__repr__(),
extractor.extract().__repr__())
expected = TableMetadata(
'hive',
'gold',
'test_schema2',
'test_table3',
'test table 3', [
ColumnMetadata('col_id3', 'description of col_id3',
'varchar', 0),
ColumnMetadata('col_name3', 'description of col_name3',
'varchar', 1)
],
is_view=False)
self.assertEqual(expected.__repr__(),
extractor.extract().__repr__())
self.assertIsNone(extractor.extract())
self.assertIsNone(extractor.extract())
def test_extraction_with_single_result(self) -> None:
with patch.object(SQLAlchemyExtractor, '_get_connection') as mock_connection, \
patch.object(HiveTableMetadataExtractor, '_choose_default_sql_stm',
return_value=HiveTableMetadataExtractor.DEFAULT_SQL_STATEMENT):
connection = MagicMock()
mock_connection.return_value = connection
sql_execute = MagicMock()
connection.execute = sql_execute
table = {
'schema': 'test_schema',
'name': 'test_table',
'description': 'a table for testing',
'is_view': 0
}
sql_execute.return_value = [
self._union(
{
'col_name': 'col_id1',
'col_type': 'bigint',
'col_description': 'description of id1',
'col_sort_order': 0,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'col_id2',
'col_type': 'bigint',
'col_description': 'description of id2',
'col_sort_order': 1,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'is_active',
'col_type': 'boolean',
'col_description': None,
'col_sort_order': 2,
'is_partition_col': 1
}, table),
self._union(
{
'col_name': 'source',
'col_type': 'varchar',
'col_description': 'description of source',
'col_sort_order': 3,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'etl_created_at',
'col_type': 'timestamp',
'col_description': 'description of etl_created_at',
'col_sort_order': 4,
'is_partition_col': 0
}, table),
self._union(
{
'col_name': 'ds',
'col_type': 'varchar',
'col_description': None,
'col_sort_order': 5,
'is_partition_col': 0
}, table)
]
extractor = HiveTableMetadataExtractor()
extractor.init(self.conf)
actual = extractor.extract()
expected = TableMetadata(
'hive',
'gold',
'test_schema',
'test_table',
'a table for testing', [
ColumnMetadata('col_id1', 'description of id1', 'bigint',
0),
ColumnMetadata('col_id2', 'description of id2', 'bigint',
1),
ColumnMetadata('is_active', None, 'boolean', 2,
['partition column']),
ColumnMetadata('source', 'description of source',
'varchar', 3),
ColumnMetadata('etl_created_at',
'description of etl_created_at',
'timestamp', 4),
ColumnMetadata('ds', None, 'varchar', 5)
],
is_view=False)
self.assertEqual(expected.__repr__(), actual.__repr__())
self.assertIsNone(extractor.extract())