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51 lines
2.1 KiB
Python
51 lines
2.1 KiB
Python
# Copyright 2021 Collate
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Validator for table custom SQL Query test case
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"""
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from sqlalchemy import text
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from metadata.data_quality.validations.mixins.sqa_validator_mixin import (
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SQAValidatorMixin,
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)
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from metadata.data_quality.validations.table.base.tableCustomSQLQuery import (
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BaseTableCustomSQLQueryValidator,
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Strategy,
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)
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from metadata.utils.helpers import is_safe_sql_query
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class TableCustomSQLQueryValidator(BaseTableCustomSQLQueryValidator, SQAValidatorMixin):
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"""Validator for table custom SQL Query test case"""
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def _run_results(self, sql_expression: str, strategy: Strategy = Strategy.ROWS):
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"""compute result of the test case"""
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if not is_safe_sql_query(sql_expression):
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raise RuntimeError(f"SQL expression is not safe\n\n{sql_expression}")
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try:
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cursor = self.runner._session.execute( # pylint: disable=protected-access
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text(sql_expression)
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)
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if strategy == Strategy.COUNT:
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result = cursor.scalar()
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if not isinstance(result, int):
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raise ValueError(
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f"When using COUNT strategy, the result must be an integer. Received: {type(result)}\n"
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"Example: SELECT COUNT(*) FROM table_name WHERE my_value IS NOT NULL"
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)
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return result
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return cursor.fetchall()
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except Exception as exc:
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self.runner._session.rollback() # pylint: disable=protected-access
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raise exc
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