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Chapter 7

E Double-click or click the yellow arrow bu tton to add the ﬁeld or function to the expression ﬁeld.

E Use the operand buttons in the center of the dialog box to insert the operatio ns into the expression.

Selecting Functions

The function list displays all available CLEM fu nctions and operators. Scroll to select a function

from t he list, o r, for easier searching, use the drop-dow n list to display a subset of functions or

operators. Available functions are grouped into categor ies for easier searching.

Figure 7-7

Functions drop-down list

Most of these categorie s are described in the R eference section of the CLEM language descrip tion.

For more information, see the to pic Funct ions Reference in Chapter 8 o n p. 133.

The other categories are as follows.



General Functions

contains a selection of some of the most commonly-us ed functions.



Recently Used

contains a lis t of CLEM fu nctions used within the current session.



@ Functions

contains a list of all the special functions, whi ch have their names preceded

by an “@” sign.



Database Functions

. If the stream includes a database co nnection (by means o f a Database

source node), this selection lists the fun ctions available from within that database, including

user-deﬁned functions (UDFs).



Operators

lists all the ope r ators you can use when building expressions. Operators are also

availabl e from the buttons in the center of the dialog box.



All Functions

contains a complete list of available CLEM functio

ns.

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IBM Switch 15 Manuale Utente Pagina 130