SQL Reference

DLURLSCHEME

>>-DLURLSCHEME--(--datalink-expression--)----------------------><
 

The schema is SYSIBM.

The DLURLSCHEME function returns the scheme from a DATALINK value with a linktype of URL. The value will always be in upper case.

The argument must be an expression that results in a value with data type DATALINK.

The result of the function is VARCHAR(20). If the argument can be null, the result can be null; if the argument is null, the result is the null value.

If the DATALINK value only includes the comment the result returned is a zero length string.

Example:

• Given a DATALINK value that was inserted into column COLA of a row in table TBLA using the scalar function:

     DLVALUE('http://dlfs.almaden.ibm.com/x/y/a.b','URL','a comment')
  

  then the following function operating on that value:

     DLURLSCHEME(COLA)
  

  will return the value:

     HTTP
  

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