String Position Function

Firebird apparently does not have a function to find one string inside another. How do I implement this? I have the Free_UDF library (FBUDF.dll) loaded into Firebird.

Example: How would you implement this type of SQL statement:
select email, pos('@',email) PE from table
jmcglothlinAsked:
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gskoczylasSenior Software DeveloperCommented:
There are two possible solutions. You can create selectable stored procedure and use build-in 'SUBSTRING(s from 1 for N)' to locate substring.

Another solution is using external function (User Defined Functions). It isn't hard task to write such UDF library with Delphi (or other language). On the page http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_udf_libs there are many UDF libraries. Some of them probably include such function (e.g. http://www.udf.adhoc-data.de/index_eng.html).
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Nick UpsonPrincipal Operations EngineerCommented:
if you just want to know if one string contains another you can use "if (str1 CONTAINS(str2)) then" in a stored procedure

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jmcglothlinAuthor Commented:
I will use the AdHoc UDF library - thanks much
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