Python 通过 teradatasql 模块连接到 Teradata 时出错 || （未能遵循所需的安全策略）

Question

我正在尝试使用 teradatasql 模块通过 python 连接到 Teradata DB。下面是我的简单代码。

    import teradatasql
    import pandas as pd
    
    query="select * from DBC.tablesv sample 10"
    
    with teradatasql.connect(host='<host ip>', user='<username>', password='<password for user>') as connect:
        df = pd.read_sql(query, connect)
    
    print(df.head())

但我在执行时收到如下错误消息。我是数据库编程的初学者。专家的任何帮助将不胜感激。

----------------------------------------------------------------

    Traceback (most recent call last):
      File "/data/home/uk393e/anaconda3-5.2.0/lib/python3.6/site-packages/pandas/io/sql.py", line 1400, in execute
        cur.execute(*args)
      File "/data/home/uk393e/anaconda3-5.2.0/lib/python3.6/site-packages/teradatasql/__init__.py", line 649, in execute
        self.executemany (sOperation, None, ignoreErrors)
      File "/data/home/uk393e/anaconda3-5.2.0/lib/python3.6/site-packages/teradatasql/__init__.py", line 896, in executemany
        raise OperationalError (sErr)
    teradatasql.OperationalError: [Version 17.0.0.2] [Session 91835188] [Teradata Database] [Error 8056] A message was received that failed to follow the required security policy
     at gosqldriver/teradatasql.(*teradataConnection).formatDatabaseError TeradataConnection.go:1138
     at gosqldriver/teradatasql.(*teradataConnection).makeChainedDatabaseError TeradataConnection.go:1154
     at gosqldriver/teradatasql.(*teradataConnection).processErrorParcel TeradataConnection.go:1217
     at gosqldriver/teradatasql.(*TeradataRows).processResponseBundle TeradataRows.go:1716
     at gosqldriver/teradatasql.(*TeradataRows).executeSQLRequest TeradataRows.go:552
     at gosqldriver/teradatasql.newTeradataRows TeradataRows.go:418
     at gosqldriver/teradatasql.(*teradataStatement).QueryContext TeradataStatement.go:122
     at gosqldriver/teradatasql.(*teradataConnection).QueryContext TeradataConnection.go:2083
     at database/sql.ctxDriverQuery ctxutil.go:48

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  File "/data/home/uk393e/anaconda3-5.2.0/lib/python3.6/site-packages/teradatasql/__init__.py", line 896, in executemany
    raise OperationalError (sErr)
pandas.io.sql.DatabaseError: Execution failed on sql: select * from DBC.tablesv
[Version 17.0.0.2] [Session 91835188] [Teradata Database] [Error 8056] A message was received that failed to follow the required security policy
 at gosqldriver/teradatasql.(*teradataConnection).formatDatabaseError TeradataConnection.go:1138
 at gosqldriver/teradatasql.(*teradataConnection).makeChainedDatabaseError TeradataConnection.go:1154
 at gosqldriver/teradatasql.(*teradataConnection).processErrorParcel TeradataConnection.go:1217
 at gosqldriver/teradatasql.(*TeradataRows).processResponseBundle TeradataRows.go:1716
 at gosqldriver/teradatasql.(*TeradataRows).executeSQLRequest TeradataRows.go:552
 at gosqldriver/teradatasql.newTeradataRows TeradataRows.go:418
 at gosqldriver/teradatasql.(*teradataStatement).QueryContext TeradataStatement.go:122
 at gosqldriver/teradatasql.(*teradataConnection).QueryContext TeradataConnection.go:2083
 at database/sql.ctxDriverQuery ctxutil.go:48
 at database/sql.(*DB).queryDC.func1 sql.go:1464
 at database/sql.withLock sql.go:3032
 at database/sql.(*DB).queryDC sql.go:1459
 at database/sql.(*Conn).QueryContext sql.go:1701
 at main.goCreateRows goside.go:652
 at main._cgoexpwrap_212fad278f55_goCreateRows _cgo_gotypes.go:357
 at runtime.call64 asm_amd64.s:574
 at runtime.cgocallbackg1 cgocall.go:316
 at runtime.cgocallbackg cgocall.go:194
 at runtime.cgocallback_gofunc asm_amd64.s:826
 at runtime.goexit asm_amd64.s:2361
unable to rollback
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Answer 1

如文档的“限制”部分所述，teradatasql 驱动程序尚未自动识别集中强制加密。在调用connect 方法时，您需要显式添加encryptdata="true" 参数。