如何在 Teradata 中导出 Varbyte

Question

我有一个 table 示例数据如下：

Num      JobId

 1      12345678

其中 Num 是 Integer 数据类型，JobId 是 Varbyte 数据类型。

我需要解压，我使用的TPT脚本是：

USING CHARACTER SET UTF8
DEFINE JOB EXPORT_DELIMITED_FILE
DESCRIPTION 'Export' ( DEFINE SCHEMA FILE_SCHEMA (
Num INTEGER,
JobID Varbyte(16)
);

DEFINE OPERATOR SQL_SELECTOR
TYPE SELECTOR
SCHEMA FILE_SCHEMA ATTRIBUTES
(
VARCHAR PrivateLogName = 'selector_log',
VARCHAR TdpId = '192.168.xx.xxx',
VARCHAR UserName = 'dbc', VARCHAR UserPassword = 'dbc',
VARCHAR SelectStmt = 'SELECT * FROM AdventureWorksDW.DB1_TB1;',

DEFINE OPERATOR FILE_WRITER
TYPE DATACONNECTOR CONSUMER
SCHEMA *
ATTRIBUTES
(
VARCHAR PrivateLogName = 'dataconnector_log',
VARCHAR DirectoryPath = 'filepath',
VARCHAR FileName = 'DB1_TB1.csv',
VARCHAR FORMAT= 'DELIMITED', //delimited doesn't work
VARCHAR TextDelimiter= '|',
VARCHAR OpenMode = 'Write'
);


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

我需要以下格式的 csv 文件：

   1 | 12345678

如何实现？

Answer 1

delimited 格式不支持二进制数据。但是您可以在 select:

中使用 from_bytes 将其转换为字符串

USING CHARACTER SET UTF8
DEFINE JOB EXPORT_DELIMITED_FILE
DESCRIPTION 'Export' 
 (
   APPLY TO OPERATOR
    ( $FILE_WRITER[1]
      ATTR ( VARCHAR PrivateLogName = 'dataconnector_log',
             VARCHAR DirectoryPath = 'filepath',
             VARCHAR FileName = 'DB1_TB1.csv',
             VARCHAR FORMAT= 'DELIMITED',
             VARCHAR TextDelimiter= '|',
             VARCHAR OpenMode = 'Write'
           )
    )
   SELECT *
   FROM OPERATOR
    ( $SELECTOR[1]
      ATTR
      ( PrivateLogName = 'selector_log',
        TdpId = '192.168.xx.xxx',
        UserName = 'dbc',
        UserPassword = 'dbc',
        SelectStmt = 'SELECT num, from_bytes(jobid, ''base16'') FROM td01.testtab;'
      )
    );
);

如何在 Teradata 中导出 Varbyte

How to export Varbyte in Teradata

teradata

teradatasql