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ea0969a772
Python 3 changed the behavior of imports with PEP328. Existing imports become absolute unless they use the new relative import syntax. This adapts the impala-shell code to use absolute imports, fixing issues where it is imported from our test code. There are several parts to this: 1. It moves impala shell code into shell/impala_shell. This matches the directory structure of the PyPi package. 2. It changes the imports in the shell code to be absolute paths (i.e. impala_shell.foo rather than foo). This fixes issues with Python 3 absolute imports. It also eliminates the need for ugly hacks in the PyPi package's __init__.py. 3. This changes Thrift generation to put it directly in $IMPALA_HOME/shell rather than $IMPALA_HOME/shell/gen-py. This means that the generated Thrift code is rooted in the same directory as the shell code. 4. This changes the PYTHONPATH to include $IMPALA_HOME/shell and not $IMPALA_HOME/shell/gen-py. This means that the test code is using the same import paths as the pypi package. With all of these changes, the source code is very close to the directory structure of the PyPi package. As long as CMake has generated the thrift files and the Python version file, only a few differences remain. This removes those differences by moving the setup.py / MANIFEST.in and other files from the packaging directory to the top-level shell/ directory. This means that one can pip install directly from the source code. i.e. pip install $IMPALA_HOME/shell This also moves the shell tarball generation script to the packaging directory and changes bin/impala-shell.sh to use Python 3. This sorts the imports using isort for the affected Python files. Testing: - Ran a regular core job with Python 2 - Ran a core job with Python 3 and verified that the absolute import issues are gone. Change-Id: Ica75a24fa6bcb78999b9b6f4f4356951b81c3124 Reviewed-on: http://gerrit.cloudera.org:8080/22330 Reviewed-by: Riza Suminto <riza.suminto@cloudera.com> Reviewed-by: Michael Smith <michael.smith@cloudera.com> Tested-by: Riza Suminto <riza.suminto@cloudera.com>
107 lines
4.4 KiB
Python
107 lines
4.4 KiB
Python
#!/usr/bin/env impala-python
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# -*- coding: utf-8 -*-
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#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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from __future__ import absolute_import, division, print_function
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from impala_shell.impala_client import ImpalaBeeswaxClient, ImpalaHS2Client
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from tests.common.impala_test_suite import ImpalaTestSuite
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from tests.common.test_dimensions import (
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create_client_protocol_dimension,
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create_client_protocol_no_strict_dimension,
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create_single_exec_option_dimension,
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create_uncompressed_text_dimension,
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)
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from tests.shell.util import get_impalad_host_port
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class TestShellClient(ImpalaTestSuite):
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"""Tests for the Impala Shell clients: ImpalaBeeswaxClient and ImpalaHS2Client."""
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@classmethod
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def add_test_dimensions(cls):
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super(TestShellClient, cls).add_test_dimensions()
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# Limit to uncompressed text with default exec options
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cls.ImpalaTestMatrix.add_dimension(
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create_uncompressed_text_dimension(cls.get_workload()))
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cls.ImpalaTestMatrix.add_dimension(create_single_exec_option_dimension())
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# Run with beeswax and HS2
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cls.ImpalaTestMatrix.add_dimension(create_client_protocol_dimension())
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cls.ImpalaTestMatrix.add_dimension(create_client_protocol_no_strict_dimension())
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def test_fetch_size(self, vector):
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"""Tests that when result spooling is disabled, setting a small batch_size causes
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the shell to fetch a single batch at a time, even when the configured fetch size is
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larger than the batch_size."""
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handle = None
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num_rows = 100
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batch_size = 10
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query_options = {'batch_size': str(batch_size), 'spool_query_results': 'false'}
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client = self.__get_shell_client(vector)
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try:
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client.connect()
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handle = client.execute_query(
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"select * from functional.alltypes limit {0}".format(num_rows), query_options)
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self.__fetch_rows(client.fetch(handle), batch_size, num_rows)
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finally:
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if handle is not None: client.close_query(handle)
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client.close_connection()
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def test_fetch_size_result_spooling(self, vector):
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"""Tests that when result spooling is enabled, that the exact fetch_size is honored
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even if a small batch_size is configured."""
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handle = None
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fetch_size = 20
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num_rows = 100
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query_options = {'batch_size': '10', 'spool_query_results': 'true'}
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client = self.__get_shell_client(vector, fetch_size)
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try:
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client.connect()
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handle = client.execute_query(
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"select * from functional.alltypes limit {0}".format(num_rows), query_options)
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self.__fetch_rows(client.fetch(handle), num_rows // fetch_size, num_rows)
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finally:
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if handle is not None: client.close_query(handle)
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client.close_connection()
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def __fetch_rows(self, fetch_batches, num_batches, num_rows):
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"""Fetches all rows using the given fetch_batches generator. Asserts that num_batches
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batches are produced by the generator and that num_rows are returned."""
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num_batches_count = 0
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rows_per_batch = num_rows // num_batches
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for fetch_batch in fetch_batches:
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assert len(fetch_batch) == rows_per_batch
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num_batches_count += 1
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if num_batches_count == num_batches: break
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assert num_batches_count == num_batches
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def __get_shell_client(self, vector, fetch_size=1024):
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"""Returns the client specified by the protocol in the given vector."""
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impalad = get_impalad_host_port(vector).split(":")
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protocol = vector.get_value("protocol")
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if protocol == 'hs2':
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return ImpalaHS2Client(impalad, fetch_size, None)
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elif protocol == 'hs2-http':
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return ImpalaHS2Client(impalad, fetch_size, None,
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use_http_base_transport=True, http_path='cliservice')
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elif protocol == 'beeswax':
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return ImpalaBeeswaxClient(impalad, fetch_size, None)
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