DECLARE statement

Use the DECLARE statement to define a variable, the data type of the variable and, optionally, its initial value.

You can define three types of variable with the DECLARE statement:

• External
• Normal
• Shared

The following types of broker node can access UDPs(USER DEFINED PROPERTY):

• Compute node
• Database node
• Filter node
• Nodes that are derived from these node types

Take care when specifying the data type of a UDP, because a CAST is used to change the value to the requested DataType.

Example 1:

DECLARE mycolor EXTERNAL CHARACTER 'blue'; 

Example 2:

DECLARE TODAYSCOLOR EXTERNAL CHARACTER;

SET COLOR = TODAYSCOLOR;

where TODAYSCOLOR is a user-defined property that has a TYPE of CHARACTER and a VALUE set by the Message Flow editor.