ISEMPTY Function (Record)
Determines whether a table or a filtered set of records is empty.
Empty := Record.ISEMPTY
The filtered set of records that you want to check.
Property Value/Return Value
true if the record or table is empty; otherwise, false. If you have applied filters, the function determines whether the filtered set of records is empty. The number of filters that you have applied to the records affects the speed of the ISEMPTY function. The fewer the number of filters, the faster the operation is performed.
When you are using SQL Server, this function is faster than using the COUNT Function (Record) and then testing the result for zero.
The following code example uses a record from the Customer table to determine whether the table has any records. The ISEMPTY function uses the CustomerRec variable to determine whether the Customer table is empty, stores the return value in the varIsEmpty variable, and displays the value in a message box. The value of the varIsEmpty variable is No because the Customer table has records (that is, not empty). The function then uses the PrinterSelec variable, which is a record from the Printer Selection table to check whether the Printer Selection table has any records and stores the return value in the varIsEmpty variable. The value of Yes is displayed in the message box because the Printer Selection table has no records (that is, empty). This example requires that you create the following variables in the C/AL Globals window.
|Variable name||Data Type||Subtype|
varIsEmpty := CustomerRec.ISEMPTY; MESSAGE('Is the Customer table empty?: %1', varIsEmpty); varIsEmpty := PrinterSelec.ISEMPTY; MESSAGE('Is the Printer Selection table empty?: %1', varIsEmpty);
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