Fixed measurement key literal parsing

Author: ritchiecarroll

src/sttp/data/filterexpressionparser.py

@@ -529,7 +529,7 @@ def exitIdentifierStatement(self, ctx: ExpressionParser.IdentifierStatementConte
             return
 
         if ctx.MEASUREMENT_KEY_LITERAL() is not None:
-            self._map_matchedfieldrow(primary_table, primary_tableidfields.measurementkey_fieldname, str(FilterExpressionParser._parse_guidliteral(ctx.MEASUREMENT_KEY_LITERAL().getText())), signalid_columnindex)
+            self._map_matchedfieldrow(primary_table, primary_tableidfields.measurementkey_fieldname, ctx.MEASUREMENT_KEY_LITERAL().getText(), signalid_columnindex)
             return
 
         if ctx.POINT_TAG_LITERAL() is not None: