在BW转换中使用REPLACE_REGEXPR会产生语法错误。

Question

我试图实现一个例程来替换BW转换中的一些无效字符。但我一直得到一个语法错误。这是我目前的代码。

METHOD S0001_G01_R40 BY DATABASE PROCEDURE FOR HDB LANGUAGE SQLSCRIPT 
OPTIONS READ-ONLY.
-- target field: 0POSTXT
-- Note the _M class are not considered for DTP execution.
-- AMDP Breakpoints must be set in the _A class instead.

outTab = SELECT REPLACE_REGEXPR('([^[:print:]|^[\x{00C0}-\x{017F}]|[#])' 
IN "SGTXT" WITH '' OCCURRENCE ALL ) AS "/BI0/OIPOSTXT"
FROM :inTab;

errorTab = SELECT '' AS ERROR_TEXT,
          '' AS SQL__PROCEDURE__SOURCE__RECORD FROM DUMMY
          WHERE DUMMY <> 'X';
ENDMETHOD.

我一直收到以下错误信息

 SQLSCRIPT message: return type mismatch: Procedure 
 /BIC/QCW72C4IJDC8JAFRICAU_M=>S0001_G01_R40: OUTTAB[ /BI0/OIPOSTXT:NVARCHAR(5000) ]
 != expected result [ POSTXT:NVARCHAR(60) RECORD:NVARCHAR(56)
 SQL__PROCEDURE__SOURCE__RECORD:NVARCHAR(56) ]

谁能告诉我我做错了什么？

Answer 1

你可能想把 regex 表达式放在一个 CAST( ... AS NVARCHAR(60)) 以确保产生的记录结构与预期的返回类型相匹配。

Answer 2

对于那些想知道如何纠正这个问题的人来说，这里有一个解决方案。

OUTTAB[ /BI0/OIPOSTXT:NVARCHAR(5000) ]
 != expected result [ POSTXT:NVARCHAR(60) RECORD:NVARCHAR(56)
 SQL__PROCEDURE__SOURCE__RECORD:NVARCHAR(56) ]

这意味着结果表OutTab只包含一个字段(BI0OIPOSTXT)，所以与OutTab预期的不同，它应该包含3个字段POSTXT，RECORD和SQL__PROCEDURE__SOURCE__RECORD。

预期的结构通常可以在公共部分的顶部看到。

  types:
    begin of TN_S_IN_S0001_G01_R1_1,
       POSTXT type C length 60,
       RECORD type C length 56,
       SQL__PROCEDURE__SOURCE__RECORD type C length 56,
    end of TN_S_IN_S0001_G01_R1_1 .

所以正确的语法应该是：

outTab =
  SELECT CAST(REPLACE_REGEXPR('([^[:print:]|^[\x{00C0}-\x{017F}]|[#])' IN "SGTXT" WITH '' OCCURRENCE ALL) AS NVARCHAR(60)) AS "POSTXT"
    ,"RECORD" AS "RECORD"
    ,SQL__PROCEDURE__SOURCE__RECORD AS "SQL__PROCEDURE__SOURCE__RECORD"
    FROM :inTab;

Regards,Jean-Guillaume