MINOR: Optimise Snowflake Test Connection (#17779)

ingestion/src/metadata/ingestion/source/database/bigquery/connection.py

@@ -17,6 +17,7 @@ from datetime import datetime
 from functools import partial
 from typing import Optional
 
+from google.api_core.exceptions import NotFound
 from google.cloud.datacatalog_v1 import PolicyTagManagerClient
 from sqlalchemy.engine import Engine
 
@@ -149,8 +150,8 @@ def test_connection(
         test_fn = {
             "CheckAccess": partial(test_connection_engine_step, engine),
             "GetSchemas": partial(execute_inspector_func, engine, "get_schema_names"),
-            "GetTables": partial(execute_inspector_func, engine, "get_table_names"),
-            "GetViews": partial(execute_inspector_func, engine, "get_view_names"),
+            "GetTables": partial(get_table_view_names, engine),
+            "GetViews": partial(get_table_view_names, engine),
             "GetTags": test_tags,
             "GetQueries": partial(
                 test_query,
@@ -170,3 +171,28 @@ def test_connection(
         )
 
     test_connection_inner(engine)
+
+
+def get_table_view_names(connection, schema=None):
+    with connection.connect() as conn:
+        current_schema = schema
+        client = conn.connection._client
+        item_types = ["TABLE", "EXTERNAL", "VIEW", "MATERIALIZED_VIEW"]
+        datasets = client.list_datasets()
+        result = []
+        for dataset in datasets:
+            if current_schema is not None and current_schema != dataset.dataset_id:
+                continue
+
+            try:
+                tables = client.list_tables(dataset.reference, page_size=1)
+                for table in tables:
+                    if table.table_type in item_types:
+                        break
+            except NotFound:
+                # It's possible that the dataset was deleted between when we
+                # fetched the list of datasets and when we try to list the
+                # tables from it. See:
+                # https://github.com/googleapis/python-bigquery-sqlalchemy/issues/105
+                pass
+        return result

ingestion/src/metadata/ingestion/source/database/redshift/connection.py

@@ -16,6 +16,7 @@ from functools import partial
 from typing import Optional
 
 from sqlalchemy.engine import Engine
+from sqlalchemy.sql import text
 
 from metadata.generated.schema.entity.automations.workflow import (
     Workflow as AutomationWorkflow,
@@ -38,6 +39,7 @@ from metadata.ingestion.connections.test_connections import (
 from metadata.ingestion.ometa.ometa_api import OpenMetadata
 from metadata.ingestion.source.connections import kill_active_connections
 from metadata.ingestion.source.database.redshift.queries import (
+    REDSHIFT_GET_ALL_RELATIONS,
     REDSHIFT_GET_DATABASE_NAMES,
     REDSHIFT_TEST_GET_QUERIES,
     REDSHIFT_TEST_PARTITION_DETAILS,
@@ -65,6 +67,11 @@ def test_connection(
     Test connection. This can be executed either as part
     of a metadata workflow or during an Automation Workflow
     """
+    table_and_view_query = text(
+        REDSHIFT_GET_ALL_RELATIONS.format(
+            schema_clause="", table_clause="", limit_clause="LIMIT 1"
+        )
+    )
 
     def test_get_queries_permissions(engine_: Engine):
         """Check if we have the right permissions to list queries"""
@@ -78,8 +85,8 @@ def test_connection(
     test_fn = {
         "CheckAccess": partial(test_connection_engine_step, engine),
         "GetSchemas": partial(execute_inspector_func, engine, "get_schema_names"),
-        "GetTables": partial(execute_inspector_func, engine, "get_table_names"),
-        "GetViews": partial(execute_inspector_func, engine, "get_view_names"),
+        "GetTables": partial(test_query, statement=table_and_view_query, engine=engine),
+        "GetViews": partial(test_query, statement=table_and_view_query, engine=engine),
         "GetQueries": partial(test_get_queries_permissions, engine),
         "GetDatabases": partial(
             test_query, statement=REDSHIFT_GET_DATABASE_NAMES, engine=engine

ingestion/src/metadata/ingestion/source/database/redshift/queries.py

@@ -236,7 +236,7 @@ REDSHIFT_TEST_PARTITION_DETAILS = "select * from SVV_TABLE_INFO limit 1"
 # hence we are appending "create view <schema>.<table> as " to select query
 # to generate the column level lineage
 REDSHIFT_GET_ALL_RELATIONS = """
-    SELECT
+    (SELECT
         c.relkind,
         n.oid as "schema_oid",
         n.nspname as "schema",
@@ -255,8 +255,9 @@ REDSHIFT_GET_ALL_RELATIONS = """
             JOIN pg_catalog.pg_user u ON u.usesysid = c.relowner
     WHERE c.relkind IN ('r', 'v', 'm', 'S', 'f')
         AND n.nspname !~ '^pg_' {schema_clause} {table_clause}
+        {limit_clause})
     UNION
-    SELECT
+    (SELECT
         'r' AS "relkind",
         s.esoid AS "schema_oid",
         s.schemaname AS "schema",
@@ -272,7 +273,8 @@ REDSHIFT_GET_ALL_RELATIONS = """
         JOIN svv_external_schemas s ON s.schemaname = t.schemaname
         JOIN pg_catalog.pg_user u ON u.usesysid = s.esowner
     where 1 {schema_clause} {table_clause}
-    ORDER BY "relkind", "schema_oid", "schema";
+    ORDER BY "relkind", "schema_oid", "schema"
+    {limit_clause});
     """
 
 

ingestion/src/metadata/ingestion/source/database/redshift/utils.py

@@ -386,7 +386,7 @@ def _get_all_relation_info(self, connection, **kw):  # pylint: disable=unused-ar
     result = connection.execute(
         sa.text(
             REDSHIFT_GET_ALL_RELATIONS.format(
-                schema_clause=schema_clause, table_clause=table_clause
+                schema_clause=schema_clause, table_clause=table_clause, limit_clause=""
             )
         )
     )

ingestion/src/metadata/ingestion/source/database/snowflake/connection.py

@@ -45,6 +45,7 @@ from metadata.ingestion.source.database.snowflake.queries import (
     SNOWFLAKE_TEST_FETCH_TAG,
     SNOWFLAKE_TEST_GET_QUERIES,
     SNOWFLAKE_TEST_GET_TABLES,
+    SNOWFLAKE_TEST_GET_VIEWS,
 )
 from metadata.utils.logger import ingestion_logger
 
@@ -176,7 +177,11 @@ def test_connection(
             statement=SNOWFLAKE_TEST_GET_TABLES,
             engine_wrapper=engine_wrapper,
         ),
-        "GetViews": partial(execute_inspector_func, engine_wrapper, "get_view_names"),
+        "GetViews": partial(
+            test_table_query,
+            statement=SNOWFLAKE_TEST_GET_VIEWS,
+            engine_wrapper=engine_wrapper,
+        ),
         "GetQueries": partial(
             test_query, statement=SNOWFLAKE_TEST_GET_QUERIES, engine=engine
         ),

ingestion/src/metadata/ingestion/source/database/snowflake/queries.py

@@ -245,6 +245,10 @@ SNOWFLAKE_TEST_GET_TABLES = """
 SELECT TABLE_NAME FROM "{database_name}".information_schema.tables LIMIT 1
 """
 
+SNOWFLAKE_TEST_GET_VIEWS = """
+SELECT TABLE_NAME FROM "{database_name}".information_schema.views LIMIT 1
+"""
+
 SNOWFLAKE_GET_DATABASES = "SHOW DATABASES"