title: Merge columns in rfc field optiond in azure adf
body: <p>Im using sap table connector . Under the rfctableoptions trying to merge columns as concat(column1,column2,column3) In (@{variables(Mergevalues)}). It ua throwing an error as nit able to parse the dynamic entry.
  Im trying to concat 3 columns and checking the value.
  How to achieve this?</p>
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