| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| from textwrap import dedent |
| from unittest import mock |
| |
| from sqlalchemy import column, literal_column |
| from sqlalchemy.dialects import postgresql |
| |
| from superset.db_engine_specs import engines |
| from superset.db_engine_specs.postgres import PostgresEngineSpec |
| from superset.errors import ErrorLevel, SupersetError, SupersetErrorType |
| from tests.db_engine_specs.base_tests import TestDbEngineSpec |
| from tests.fixtures.certificates import ssl_certificate |
| from tests.fixtures.database import default_db_extra |
| |
| |
| class TestPostgresDbEngineSpec(TestDbEngineSpec): |
| def test_get_table_names(self): |
| """ |
| DB Eng Specs (postgres): Test get table names |
| """ |
| |
| """ Make sure postgres doesn't try to remove schema name from table name |
| ie. when try_remove_schema_from_table_name == False. """ |
| inspector = mock.Mock() |
| inspector.get_table_names = mock.Mock(return_value=["schema.table", "table_2"]) |
| inspector.get_foreign_table_names = mock.Mock(return_value=["table_3"]) |
| |
| pg_result_expected = ["schema.table", "table_2", "table_3"] |
| pg_result = PostgresEngineSpec.get_table_names( |
| database=mock.ANY, schema="schema", inspector=inspector |
| ) |
| self.assertListEqual(pg_result_expected, pg_result) |
| |
| def test_time_exp_literal_no_grain(self): |
| """ |
| DB Eng Specs (postgres): Test no grain literal column |
| """ |
| col = literal_column("COALESCE(a, b)") |
| expr = PostgresEngineSpec.get_timestamp_expr(col, None, None) |
| result = str(expr.compile(None, dialect=postgresql.dialect())) |
| self.assertEqual(result, "COALESCE(a, b)") |
| |
| def test_time_exp_literal_1y_grain(self): |
| """ |
| DB Eng Specs (postgres): Test grain literal column 1 YEAR |
| """ |
| col = literal_column("COALESCE(a, b)") |
| expr = PostgresEngineSpec.get_timestamp_expr(col, None, "P1Y") |
| result = str(expr.compile(None, dialect=postgresql.dialect())) |
| self.assertEqual(result, "DATE_TRUNC('year', COALESCE(a, b))") |
| |
| def test_time_ex_lowr_col_no_grain(self): |
| """ |
| DB Eng Specs (postgres): Test no grain expr lower case |
| """ |
| col = column("lower_case") |
| expr = PostgresEngineSpec.get_timestamp_expr(col, None, None) |
| result = str(expr.compile(None, dialect=postgresql.dialect())) |
| self.assertEqual(result, "lower_case") |
| |
| def test_time_exp_lowr_col_sec_1y(self): |
| """ |
| DB Eng Specs (postgres): Test grain expr lower case 1 YEAR |
| """ |
| col = column("lower_case") |
| expr = PostgresEngineSpec.get_timestamp_expr(col, "epoch_s", "P1Y") |
| result = str(expr.compile(None, dialect=postgresql.dialect())) |
| self.assertEqual( |
| result, |
| "DATE_TRUNC('year', " |
| "(timestamp 'epoch' + lower_case * interval '1 second'))", |
| ) |
| |
| def test_time_exp_mixd_case_col_1y(self): |
| """ |
| DB Eng Specs (postgres): Test grain expr mixed case 1 YEAR |
| """ |
| col = column("MixedCase") |
| expr = PostgresEngineSpec.get_timestamp_expr(col, None, "P1Y") |
| result = str(expr.compile(None, dialect=postgresql.dialect())) |
| self.assertEqual(result, "DATE_TRUNC('year', \"MixedCase\")") |
| |
| def test_convert_dttm(self): |
| """ |
| DB Eng Specs (postgres): Test conversion to date time |
| """ |
| dttm = self.get_dttm() |
| |
| self.assertEqual( |
| PostgresEngineSpec.convert_dttm("DATE", dttm), |
| "TO_DATE('2019-01-02', 'YYYY-MM-DD')", |
| ) |
| |
| self.assertEqual( |
| PostgresEngineSpec.convert_dttm("TIMESTAMP", dttm), |
| "TO_TIMESTAMP('2019-01-02 03:04:05.678900', 'YYYY-MM-DD HH24:MI:SS.US')", |
| ) |
| |
| self.assertEqual( |
| PostgresEngineSpec.convert_dttm("DATETIME", dttm), |
| "TO_TIMESTAMP('2019-01-02 03:04:05.678900', 'YYYY-MM-DD HH24:MI:SS.US')", |
| ) |
| |
| self.assertEqual(PostgresEngineSpec.convert_dttm("TIME", dttm), None) |
| |
| def test_empty_dbapi_cursor_description(self): |
| """ |
| DB Eng Specs (postgres): Test empty cursor description (no columns) |
| """ |
| cursor = mock.Mock() |
| # empty description mean no columns, this mocks the following SQL: "SELECT" |
| cursor.description = [] |
| results = PostgresEngineSpec.fetch_data(cursor, 1000) |
| self.assertEqual(results, []) |
| |
| def test_engine_alias_name(self): |
| """ |
| DB Eng Specs (postgres): Test "postgres" in engine spec |
| """ |
| self.assertIn("postgres", engines) |
| |
| def test_extras_without_ssl(self): |
| db = mock.Mock() |
| db.extra = default_db_extra |
| db.server_cert = None |
| extras = PostgresEngineSpec.get_extra_params(db) |
| assert "connect_args" not in extras["engine_params"] |
| |
| def test_extras_with_ssl_default(self): |
| db = mock.Mock() |
| db.extra = default_db_extra |
| db.server_cert = ssl_certificate |
| extras = PostgresEngineSpec.get_extra_params(db) |
| connect_args = extras["engine_params"]["connect_args"] |
| assert connect_args["sslmode"] == "verify-full" |
| assert "sslrootcert" in connect_args |
| |
| def test_extras_with_ssl_custom(self): |
| db = mock.Mock() |
| db.extra = default_db_extra.replace( |
| '"engine_params": {}', |
| '"engine_params": {"connect_args": {"sslmode": "verify-ca"}}', |
| ) |
| db.server_cert = ssl_certificate |
| extras = PostgresEngineSpec.get_extra_params(db) |
| connect_args = extras["engine_params"]["connect_args"] |
| assert connect_args["sslmode"] == "verify-ca" |
| assert "sslrootcert" in connect_args |
| |
| def test_estimate_statement_cost_select_star(self): |
| """ |
| DB Eng Specs (postgres): Test estimate_statement_cost select star |
| """ |
| |
| cursor = mock.Mock() |
| cursor.fetchone.return_value = ( |
| "Seq Scan on birth_names (cost=0.00..1537.91 rows=75691 width=46)", |
| ) |
| sql = "SELECT * FROM birth_names" |
| results = PostgresEngineSpec.estimate_statement_cost(sql, cursor) |
| self.assertEqual( |
| results, {"Start-up cost": 0.00, "Total cost": 1537.91,}, |
| ) |
| |
| def test_estimate_statement_invalid_syntax(self): |
| """ |
| DB Eng Specs (postgres): Test estimate_statement_cost invalid syntax |
| """ |
| from psycopg2 import errors |
| |
| cursor = mock.Mock() |
| cursor.execute.side_effect = errors.SyntaxError( |
| """ |
| syntax error at or near "EXPLAIN" |
| LINE 1: EXPLAIN DROP TABLE birth_names |
| ^ |
| """ |
| ) |
| sql = "DROP TABLE birth_names" |
| with self.assertRaises(errors.SyntaxError): |
| PostgresEngineSpec.estimate_statement_cost(sql, cursor) |
| |
| def test_query_cost_formatter_example_costs(self): |
| """ |
| DB Eng Specs (postgres): Test test_query_cost_formatter example costs |
| """ |
| raw_cost = [ |
| {"Start-up cost": 0.00, "Total cost": 1537.91,}, |
| {"Start-up cost": 10.00, "Total cost": 1537.00,}, |
| ] |
| result = PostgresEngineSpec.query_cost_formatter(raw_cost) |
| self.assertEqual( |
| result, |
| [ |
| {"Start-up cost": "0.0", "Total cost": "1537.91",}, |
| {"Start-up cost": "10.0", "Total cost": "1537.0",}, |
| ], |
| ) |
| |
| def test_extract_errors(self): |
| """ |
| Test that custom error messages are extracted correctly. |
| """ |
| msg = 'psql: error: FATAL: role "testuser" does not exist' |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| error_type=SupersetErrorType.CONNECTION_INVALID_USERNAME_ERROR, |
| message='The username "testuser" does not exist.', |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| { |
| "code": 1012, |
| "message": ( |
| "Issue 1012 - The username provided when " |
| "connecting to a database is not valid." |
| ), |
| }, |
| ], |
| }, |
| ) |
| ] |
| |
| msg = ( |
| 'psql: error: could not translate host name "locahost" to address: ' |
| "nodename nor servname provided, or not known" |
| ) |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| error_type=SupersetErrorType.CONNECTION_INVALID_HOSTNAME_ERROR, |
| message='The hostname "locahost" cannot be resolved.', |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| { |
| "code": 1007, |
| "message": "Issue 1007 - The hostname provided " |
| "can't be resolved.", |
| } |
| ], |
| }, |
| ) |
| ] |
| |
| msg = dedent( |
| """ |
| psql: error: could not connect to server: Connection refused |
| Is the server running on host "localhost" (::1) and accepting |
| TCP/IP connections on port 12345? |
| could not connect to server: Connection refused |
| Is the server running on host "localhost" (127.0.0.1) and accepting |
| TCP/IP connections on port 12345? |
| """ |
| ) |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| error_type=SupersetErrorType.CONNECTION_PORT_CLOSED_ERROR, |
| message='Port 12345 on hostname "localhost" refused the connection.', |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| {"code": 1008, "message": "Issue 1008 - The port is closed."} |
| ], |
| }, |
| ) |
| ] |
| |
| msg = dedent( |
| """ |
| psql: error: could not connect to server: Operation timed out |
| Is the server running on host "example.com" (93.184.216.34) and accepting |
| TCP/IP connections on port 12345? |
| """ |
| ) |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| error_type=SupersetErrorType.CONNECTION_HOST_DOWN_ERROR, |
| message=( |
| 'The host "example.com" might be down, ' |
| "and can't be reached on port 12345." |
| ), |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| { |
| "code": 1009, |
| "message": "Issue 1009 - The host might be down, " |
| "and can't be reached on the provided port.", |
| } |
| ], |
| }, |
| ) |
| ] |
| |
| # response with IP only |
| msg = dedent( |
| """ |
| psql: error: could not connect to server: Operation timed out |
| Is the server running on host "93.184.216.34" and accepting |
| TCP/IP connections on port 12345? |
| """ |
| ) |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| error_type=SupersetErrorType.CONNECTION_HOST_DOWN_ERROR, |
| message=( |
| 'The host "93.184.216.34" might be down, ' |
| "and can't be reached on port 12345." |
| ), |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| { |
| "code": 1009, |
| "message": "Issue 1009 - The host might be down, " |
| "and can't be reached on the provided port.", |
| } |
| ], |
| }, |
| ) |
| ] |
| |
| msg = 'FATAL: password authentication failed for user "postgres"' |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| error_type=SupersetErrorType.CONNECTION_INVALID_PASSWORD_ERROR, |
| message=('The password provided for username "postgres" is incorrect.'), |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| { |
| "code": 1013, |
| "message": ( |
| "Issue 1013 - The password provided when " |
| "connecting to a database is not valid." |
| ), |
| }, |
| ], |
| }, |
| ) |
| ] |
| |
| msg = 'database "badDB" does not exist' |
| result = PostgresEngineSpec.extract_errors(Exception(msg)) |
| assert result == [ |
| SupersetError( |
| message='Unable to connect to database "badDB".', |
| error_type=SupersetErrorType.CONNECTION_UNKNOWN_DATABASE_ERROR, |
| level=ErrorLevel.ERROR, |
| extra={ |
| "engine_name": "PostgreSQL", |
| "issue_codes": [ |
| { |
| "code": 1015, |
| "message": ( |
| "Issue 1015 - Either the database is spelled " |
| "incorrectly or does not exist.", |
| ), |
| } |
| ], |
| }, |
| ) |
| ] |
