Use the @COLSTAT function to return an indicator to Extract or Replicat that a column is missing, null, or invalid. The indicator can be used as part of a larger manipulation formula that uses additional conversion functions.

Syntax

@COLSTAT ({MISSING | NULL | INVALID})

Examples

Example 1   

The following example returns a NULL into target column ITEM.

ITEM = @COLSTAT (NULL)

Example 2   

The following @IF calculation uses @COLSTAT to return NULL to the target column if PRICE and QUANTITY are less than zero.

ORDER_TOTAL = PRICE * QUANTITY, @IF (PRICE < 0 AND QUANTITY < 0, @COLSTAT(NULL))