我需要用正则表达式替换SQL语句中的字符

Question

我试图匹配此SQL语句上的BETWEEN RANGE，如下所示：

( WAEXD8 BETWEEN &WAEXD8 AND &WAEXD8 ) 

上面的SQL语句与DBS数据源一起使用，并且在通过ODBC驱动程序在iSeries连接上有效时，该DB连接类型不适用于ADO.NET。 ASP.NET ADO连接需要使用以下语法替换BETWEEN RANGE

date(digits(FIELDNAME) CONCAT '000000') <= current date and date(digits(FIELDNAME) CONCAT '000000') >= current date 

WHERE FIELDNAME是在原始SQL语句中找到的WAEXD8列...

我已经尝试过了，但到目前为止还没有一个真正的解决方案...

同样，我希望将原始SQL查询的ASP.NET C＃正则表达式匹配/替换为替换字符串，同时保留原始列名。 这可能吗？ 模式或模式示例是什么，以便我可以做到？

可能的其他解决方案：

要匹配（任意数量的带有BETWEEN且具有HTML实体&的空格）

例如： ([(])|([BETWEEN])*([0-9A-Za-z])*([)])

Answer 1

不确定要做什么，但以下是一些可以帮助您的示例：

替换所有包含& BETWEEN语句& 和同一个FIELDNAME

将符合以下条件：

• ( WAEXD8 BETWEEN &WAEXD8 AND &WAEXD8 )
• (WAEXD8 BETWEEN &WAEXD8 AND &WAEXD8)
• (WAEXD8 BETWEEN &WAEXD8 AND &WAEXD8 )
• ( WAEXD8 BETWEEN &WAEXD8 AND &WAEXD8 )
• ( FIELDEXAMPLE1 BETWEEN &FIELDEXAMPLE1 AND &FIELDEXAMPLE1 )

不匹配：

• ( WAEXD8 BETWEEN WAEXD8 AND WAEXD8 )
• ( WAEXD8 BETWEEN 0 AND 9000 )
• ( WAEXD8 BETWEEN &WAEXD8&A;NY1 AND &WAEXD&8ANY2 )
• ( FIELDEXAMPLE1 BETWEEN &FIELDEXAMPLE2 AND &FIELDEXAMPLE2 )

Regex regexObj = new Regex(@"\(\s*(\w+)\s+BETWEEN\s+&\1\s+AND\s+&\1\s*\)");
resultString = regexObj.Replace(subjectString, "(date(digits($1) CONCAT '000000') <= current date and date(digits($1) CONCAT '000000') >= current date)");

或者，如果您知道字段名称为AMAZINGFIELDNAME则：

Regex regexObj = new Regex(@"\(\s*(AMAZINGFIELDNAME)\s+BETWEEN\s+&\1\s+AND\s+&\1\s*\)");
resultString = regexObj.Replace(subjectString, "(date(digits($1) CONCAT '000000') <= current date and date(digits($1) CONCAT '000000') >= current date)");

将所有BETWEEN语句（包括任何语句）替换为字符“＆”和“;”

将符合以下条件：

• ( WAEXD8 BETWEEN &WAEXD8 AND &WAEXD8 )
• ( WAEXD8 BETWEEN &WAEXD8&A;NY1 AND &WAEXD&8ANY2 )
• ( FIELDEXAMPLE1 BETWEEN &FIELDEXAMPLE2 AND &FIELDEXAMPLE2 )

Regex regexObj = new Regex(@"\(\s*(\w+)\s+BETWEEN\s+[\w&;]+\s+AND\s+[\w&;]+\s*\)");
resultString = regexObj.Replace(subjectString, "(date(digits($1) CONCAT '000000') <= current date and date(digits($1) CONCAT '000000') >= current date)");