In SAP Datasphere, the expression you've provided appears to be a conditional statement that checks whether the variable `MEINS` (which might represent a unit of measure) is either "KG" (kilograms) or "L" (liters). Depending on this condition, it returns either `VMSL` or `VMSL/UMREZ`.
To translate this logic into a valid SQL expression suitable for SAP Datasphere, you could use a `CASE` statement. Here's how you can write this