Function: lookup()

Triggers a lookup on a specified pipe.

Function sets up $-Variables that are used in the pipe, database and file collector expressions to retrieve data down the pipe.

$-Variables that are set are only available whilst the attribute expression is being processed.

Syntax

lookup(pipeName, expressionVariableN)

Examples

lookup(in, $num)

Performs a lookup down the in pipe. The value held in the $num variable will be used to evaluate the expression in which $num is used in, e.g. pipe or collector expression.

lookup(in, $num = _out.BNumber)

Performs a lookup down the in pipe. The value held in the $num variable is set to equal the BNumber of the current candidate set being processed. This will be used to evaluate the expression in which $num is used in, e.g. pipe or collector expression.

lookup(in, $num = _out.BNumber, $band = _out.BandingModel)

Performs a lookup down the in pipe. The values held in the $num and $band variables are set to equal the BNumber and BandingModel values of the current candidate set being processed. These will be used to evaluate the expression in which $num and $band are used in, e.g. pipe or collector expression.

See Also

• Functions