Teradata TPT删除单引号的尾随句点或转义字符

我有一个简单的TPT export命令，正如您所看到的，我试图从列中删除尾随句点

修剪（从PRTY_ID开始的尾随“.”

由于“VARCHAR SelectStmt”以单引号开头，因此我无法在“TRIM（training.”中使用单引号，从PRTY_ID开始）

是否有一种方法可以从select语句中转义单引号，或者有任何其他方法可以删除尾随句点。谢谢

DEFINE JOB EXPORT_DELIMITED_FILE
DESCRIPTION 'Export rows from a Teradata table to a delimited file'
(
    DEFINE SCHEMA FILE_SCHEMA
    (
        COL1 VARCHAR
    );

    DEFINE OPERATOR SQL_SELECTOR
    TYPE SELECTOR
    SCHEMA FILE_SCHEMA
    ATTRIBUTES
    (
        VARCHAR PrivateLogName = 'selector_log',
        VARCHAR TdpId = 'prod',
        VARCHAR LogonMech = 'LDAP',
        VARCHAR UserName = 'user1',
        VARCHAR UserPassword = 'XXXX',
        VARCHAR SelectStmt =  '  
            select TOP 100 
                trim ( 
                    cast ( 
                            ( 
                                trim(cast(cast(TRIM(trailing '.' from EMP_ID) AS CHAR(100))) 
                            ) 
                        as  CHAR(10000)) 
                )
             from DP_TRM.V_ANSWER_FACT ; ',
        VARCHAR ReportModeOn = 'Y'
    );

    DEFINE OPERATOR FILE_WRITER
    TYPE DATACONNECTOR CONSUMER
    SCHEMA *
    ATTRIBUTES
    (
        VARCHAR PrivateLogName = 'dataconnector_log',
        VARCHAR DirectoryPath = 'T:\Manjesh\Athena\Output\V_SURVEY_ANSWER_FACT\',
        VARCHAR FileName = 'V_SURVEY_ANSWER_FACT*.csv',
        VARCHAR Format = 'Delimited',
        VARCHAR IndicatorMode = 'N', 
        VARCHAR OpenMode = 'Write',
        VARCHAR TextDelimiter = '|'
    );

    APPLY TO OPERATOR (FILE_WRITER)
    SELECT * FROM OPERATOR (SQL_SELECTOR);
);

---

在SQL中，通过将其加倍，可以像字符串文字中的单个引号一样对其进行转义：

VARCHAR SelectStmt =  '  
    select TOP 100 
        trim ( 
            cast ( 
                    ( 
                        trim(cast(cast(TRIM(trailing ''.'' from EMP_ID) AS CHAR(100))) 
                    ) 
                as  CHAR(10000)) 
        )
     from DP_TRM.V_ANSWER_FACT ; ',

但为什么要对CHAR执行多次强制转换，然后进行修剪，而不是直接强制转换为VarChar

而

EMP_ID

可能被定义为十进制，并且由于默认格式

Z（x）9，所以添加了尾随句点。

，您可以将其转换为整数，这样就不需要修剪