mirror of
https://github.com/open-metadata/OpenMetadata.git
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93 lines
3.0 KiB
Python
93 lines
3.0 KiB
Python
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# 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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Helpers module for db sources
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"""
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import traceback
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from metadata.generated.schema.entity.data.table import Table
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from metadata.ingestion.lineage.models import ConnectionTypeDialectMapper
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from metadata.ingestion.lineage.parser import LineageParser
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from metadata.ingestion.lineage.sql_lineage import (
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get_lineage_by_query,
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get_lineage_via_table_entity,
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)
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from metadata.ingestion.ometa.ometa_api import OpenMetadata
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from metadata.ingestion.source.models import TableView
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from metadata.utils import fqn
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from metadata.utils.logger import utils_logger
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logger = utils_logger()
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def get_host_from_host_port(uri: str) -> str:
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"""
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if uri is like "localhost:9000"
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then return the host "localhost"
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"""
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return uri.split(":")[0]
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def get_view_lineage(
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view: TableView, metadata: OpenMetadata, service_name: str, connection_type: str
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):
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"""
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Method to generate view lineage
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"""
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table_name = view.table_name
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schema_name = view.schema_name
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db_name = view.db_name
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view_definition = view.view_definition
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table_fqn = fqn.build(
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metadata,
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entity_type=Table,
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service_name=service_name,
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database_name=db_name,
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schema_name=schema_name,
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table_name=table_name,
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)
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table_entity = metadata.get_by_name(
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entity=Table,
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fqn=table_fqn,
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)
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try:
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connection_type = str(connection_type)
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dialect = ConnectionTypeDialectMapper.dialect_of(connection_type)
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lineage_parser = LineageParser(view_definition, dialect)
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if lineage_parser.source_tables and lineage_parser.target_tables:
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yield from get_lineage_by_query(
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metadata,
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query=view_definition,
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service_name=service_name,
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database_name=db_name,
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schema_name=schema_name,
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dialect=dialect,
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) or []
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else:
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yield from get_lineage_via_table_entity(
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metadata,
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table_entity=table_entity,
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service_name=service_name,
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database_name=db_name,
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schema_name=schema_name,
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query=view_definition,
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dialect=dialect,
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) or []
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except Exception as exc:
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logger.debug(traceback.format_exc())
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logger.warning(
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f"Could not parse query [{view_definition}] ingesting lineage failed: {exc}"
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)
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