雲扳手python客戶端刪除失敗，類型為INT64

Question

我試圖在具有INT64類型鍵的表上傳遞刪除請求，並且收到以下錯誤：表INT_KEYS中列key1的值無效：預期為INT64

請求刪除操作時，有沒有鍵入鍵范圍的特定方法？ 我可以使用相同的輸入插入數據，但是刪除請求失敗。 我寫了下面的短代碼來說明

keys = ['key1', 'key2']
ins_values = [[2, 5],
              [3, 6],
              [4, 7]]
del_values = [[2, 5],
              [4, 7]]

for table_name in ['STR_KEYS', 'INT_KEYS']:
    with database.batch() as batch:
        result = batch.insert_or_update(
            table_name, keys, ins_values
        )
    print 'completed insert in table %s' % table_name

    with database.batch() as batch:
        key_ranges = list()
        for value_list in del_values:
            key_range = spanner.KeyRange(start_closed=value_list, end_closed=value_list)
            key_ranges.append(key_range)
        key_set = spanner.KeySet(keys=[keys], ranges=key_ranges)
        result = batch.delete(
            table_name, key_set
        )
    print 'deleted data from table %s' % table_name

我得到下面的輸出

completed insert in table STR_KEYS
deleted data from table STR_KEYS
completed insert in table INT_KEYS
Traceback (most recent call last):
File "/Users/thibault/PycharmProjects/spanner-local/testIntDelete.py", line 89, in <module>
table_name, key_set
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/cloud/spanner_v1/database.py", line 409, in __exit__
self._batch.commit()
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/cloud/spanner_v1/batch.py", line 156, in commit
options=options)
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/cloud/spanner_v1/gapic/spanner_client.py", line 845, in commit
return self._commit(request, options)
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/gax/api_callable.py", line 452, in inner
return api_caller(api_call, this_settings, request)
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/gax/api_callable.py", line 438, in base_caller
return api_call(*args)
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/gax/api_callable.py", line 376, in inner
return a_func(*args, **kwargs)
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/google/gax/retry.py", line 127, in inner
' classified as transient', exception)
google.gax.errors.RetryError: RetryError(Exception occurred in retry method that was not classified as transient, caused by <_Rendezvous of RPC that terminated with (StatusCode.FAILED_PRECONDITION, Invalid value for column key1 in table INT_KEYS: Expected INT64.)>)

Answer 1

使用delete API，您只需要在“鍵”或“范圍”中指定主鍵值，而無需指定值。 我推斷您的INT_KEYS模式類似於：

CREATE TABLE INT_KEYS（key1 INT64 NOT NULL，key2 INT64 NOT NULL，）主鍵（key1，key2）;

在這種情況下，要刪除插入的行，您需要以下內容：

with database.batch() as batch:
    key_ranges = list()
    for value_list in del_values:
        key_range = spanner.KeyRange(start_closed=value_list, end_closed=value_list)
        key_ranges.append(key_range)
    key_set = spanner.KeySet(ranges=key_ranges)
    result = batch.delete(
        table_name, key_set
    )

注意，您不需要（也不應該嘗試）通過“ keys”屬性指定列名； 用於指定要刪除的特定行。

FWIW，您的代碼適用於STR_KEYS，因為（“” key1“，” key2“）可以成功地解釋為不存在的行的主鍵（key1 = key1，key2 = key2），並且Spanner不會報告錯誤刪除不存在的行時。