Mule 4 - 将字符串数组转换为单个字符串

Question

我有一个 SQL 更新语句需要的主键数组。我的目标是不循环遍历每个主键并多次执行更新语句。我想做的是创建一个字符串，只执行语句 1 次。

这是我的主键数组

["1234-114600000034-000093-ABCDE","1234-034-114600000378-FGH","1234- 
 114600000034-1146000-JKLMN","1234-1146034-00380-OPQRS","1234- 
 114600000034-1181-TUVWX"]

我想要的输出是这样的字符串

('1234-114600000034-000093-ABCDE','1234-034-114600000378-FGH','1234- 
 114600000034-1146000-JKLMN','1234-1146034-00380-OPQRS','1234- 
 114600000034-1181-TUVWX')

我的 SQL 语句看起来像这样

UPDATE [TABLE_NAME] SET [COLUMN_NAME] = 1 WHERE ID IN ('1234-114600000034-000093-ABCDE','1234-034-114600000378-FGH','1234- 
 114600000034-1146000-JKLMN','1234-1146034-00380-OPQRS','1234- 
 114600000034-1181-TUVWX')

如有任何帮助，我们将不胜感激。

Answer 1

其中一种方法是使用 reduce。

脚本

%dw 2.0
output application/java
var inp = ["1234-114600000034-000093-ABCDE","1234-034-114600000378-FGH","1234-114600000034-1146000-JKLMN","1234-1146034-00380-OPQRS","1234-114600000034-1181-TUVWX"]
---
('(' ++ (inp reduce ((item, acc = '') -> acc ++ "'" ++ item ++ "',"  )) ++ ')') replace ',)' with ')'

输出

('1234-114600000034-000093-ABCDE','1234-034-114600000378-FGH','1234-114600000034-1146000-JKLMN','1234-1146034-00380-OPQRS','1234-114600000034-1181-TUVWX')

Answer 2

您可以使用 joinBy 函数，然后在前面和后面附加引号和括号。

%dw 2.0
output application/json
var ids = ["1234-114600000034-000093-ABCDE","1234-034-114600000378-FGH",
    "1234-114600000034-1146000-JKLMN","1234-1146034-00380-OPQRS",
    "1234-114600000034-1181-TUVWX"]
---
"UPDATE [TABLE_NAME] SET [COLUMN_NAME] = 1 WHERE ID IN ('" 
    ++  (ids joinBy  "','") ++ "')"

Answer 3

还有另一种方法可以获得所需的输出

在下面的代码中，我将主键数组作为变量并对其执行逻辑

%dw 2.0
output application/java

var inputPayload = ["1234-114600000034-000093-ABCDE","1234-034-114600000378-FGH","1234-114600000034-1146000-JKLMN","1234-1146034-00380-OPQRS","1234- 114600000034-1181-TUVWX"]

---
"UPDATE [TABLE_NAME] SET [COLUMN_NAME] = 1 WHERE ID IN " ++ ((write(inputPayload, "application/json")) replace "[" with "(") replace "]" with ")"

以上逻辑的输出为

UPDATE [TABLE_NAME) SET [COLUMN_NAME) = 1 WHERE ID IN (
  "1234-114600000034-000093-ABCDE",
  "1234-034-114600000378-FGH",
  "1234-114600000034-1146000-JKLMN",
  "1234-1146034-00380-OPQRS",
  "1234- 114600000034-1181-TUVWX"
)

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