google-bigquery - 根据唯一 ID 列表删除 Big Query 表中的批量行
问题描述
因此,我尝试使用如下简单查询删除 Big Query 表中的一些行:
client = bigquery.Client()
query = "DELETE FROM Sample_Dataset.Sample_Table WHERE Sample_Table_Id IN {}".format(primary_key_list)
query_job = client.query(query, location="us-west1")
其中 primary_key_list 是一些 python 列表,其中包含 Sample_Table 唯一 ID 的列表,例如:[123, 124, 125, ...]
我检索到的小数据效果很好,但是当 primary_key_list 增长时,它给了我一个错误:
查询过大。最大标准 SQL 查询长度为 1024.00K 个字符,包括注释和空格字符。
我意识到查询将足够长以达到最大查询长度,并且在搜索堆栈溢出后我发现有一个使用参数化查询的解决方案,所以我将我的代码更改为:
client = bigquery.Client()
query = "DELETE FROM Sample_Dataset.Sample_Table WHERE Sample_Table_Id IN UNNEST(@List_Sample_Table_Id)"
job_config = bigquery.QueryJobConfig(
query_parameters=[
bigquery.ArrayQueryParameter("List_Sample_Table_Id", "INT64", primary_key_list),
]
)
query_job = client.query(query, job_config=job_config)
它停止给我最大标准 SQL 查询长度,但返回另一个错误异常,知道从 Big Query 中删除批量行吗?
我不知道这些信息是否有用,但我正在谷歌云 Dataproc 上运行这个 python 代码,这只是我最近添加的一些函数,在我添加这个函数之前一切正常,这是我的日志'已经使用参数化查询运行删除。
Traceback (most recent call last):
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py", line 320, in _send_until_done
return self.connection.send(data)
File "/opt/conda/default/lib/python3.7/site-packages/OpenSSL/SSL.py", line 1737, in send
self._raise_ssl_error(self._ssl, result)
File "/opt/conda/default/lib/python3.7/site-packages/OpenSSL/SSL.py", line 1639, in _raise_ssl_error
raise SysCallError(errno, errorcode.get(errno))
OpenSSL.SSL.SysCallError: (32, 'EPIPE')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1244, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1290, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1239, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1065, in _send_output
self.send(chunk)
File "/opt/conda/default/lib/python3.7/http/client.py", line 987, in send
self.sock.sendall(data)
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py", line 331, in sendall
sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py", line 326, in _send_until_done
raise SocketError(str(e))
OSError: (32, 'EPIPE')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/conda/default/lib/python3.7/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/connectionpool.py", line 638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/util/retry.py", line 368, in increment
raise six.reraise(type(error), error, _stacktrace)
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/packages/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1244, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1290, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1239, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/opt/conda/default/lib/python3.7/http/client.py", line 1065, in _send_output
self.send(chunk)
File "/opt/conda/default/lib/python3.7/http/client.py", line 987, in send
self.sock.sendall(data)
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py", line 331, in sendall
sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
File "/opt/conda/default/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py", line 326, in _send_until_done
raise SocketError(str(e))
urllib3.exceptions.ProtocolError: ('Connection aborted.', OSError("(32, 'EPIPE')"))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/tmp/a05a15822be04a9abdc1ba05e317bb2f/ItemHistory-get.py", line 92, in <module>
delete_duplicate_pk()
File "/tmp/a05a15822be04a9abdc1ba05e317bb2f/ItemHistory-get.py", line 84, in delete_duplicate_pk
query_job = client.query(query, job_config=job_config, location="asia-southeast2")
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/bigquery/client.py", line 2893, in query
query_job._begin(retry=retry, timeout=timeout)
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/bigquery/job/query.py", line 1069, in _begin
super(QueryJob, self)._begin(client=client, retry=retry, timeout=timeout)
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/bigquery/job/base.py", line 438, in _begin
timeout=timeout,
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/bigquery/client.py", line 643, in _call_api
return call()
File "/opt/conda/default/lib/python3.7/site-packages/google/api_core/retry.py", line 286, in retry_wrapped_func
on_error=on_error,
File "/opt/conda/default/lib/python3.7/site-packages/google/api_core/retry.py", line 184, in retry_target
return target()
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/_http.py", line 434, in api_request
timeout=timeout,
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/_http.py", line 292, in _make_request
method, url, headers, data, target_object, timeout=timeout
File "/opt/conda/default/lib/python3.7/site-packages/google/cloud/_http.py", line 330, in _do_request
url=url, method=method, headers=headers, data=data, timeout=timeout
File "/opt/conda/default/lib/python3.7/site-packages/google/auth/transport/requests.py", line 470, in request
**kwargs
File "/opt/conda/default/lib/python3.7/site-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/opt/conda/default/lib/python3.7/site-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/opt/conda/default/lib/python3.7/site-packages/requests/adapters.py", line 498, in send
raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', OSError("(32, 'EPIPE')"))
解决方案
正如@blackbishop提到的那样,您可以尝试将请求升级到最新版本(在我的情况下它解决了问题),但是由于我尝试更新批量行(比如说 Big Query 中的 500.000+ 行,每行都有一个唯一的 id) ,事实证明,我使用的小型机器类型 Dataproc 集群让我超时(如果有人有资源尝试使用更好的 Dataproc 集群并取得成功,请随时编辑此答案)。
因此,我使用此处记录的 Merge 语句: https ://cloud.google.com/bigquery/docs/reference/standard-sql/dml-syntax#merge_statement
脚本将像这样更新现有行(假设我有检索到的新数据并已将其加载到 Staging_Sample_Dataset.Staging_Sample_Table):
def merge_data():
client = bigquery.Client()
query = """MERGE INTO Sample_Dataset.Sample_Table st
USING Staging_Sample_Dataset.Staging_Sample_Table ss
ON st.Sample_Table_Id = ss.Sample_Table_Id
WHEN MATCHED UPDATE SET st.Your_Column = ss.Your_Column -- and the list goes on...
WHEN NOT MATCHED THEN INSERT ROW
"""
query_job = client.query(query, location="asia-southeast2")
results = query_job.result()
或者我可以删除批量行并在此函数执行后调用另一个函数来加载:
def bulk_delete():
client = bigquery.Client()
query = """MERGE INTO Sample_Dataset.Sample_Table st
USING Staging_Sample_Dataset.Staging_Sample_Table sst
ON st.Sample_Table_Id = sst.Sample_Table_Id
WHEN MATCHED THEN DELETE
"""
query_job = client.query(query, location="asia-southeast2")
results = query_job.result()
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