lib/fat_table/table.rb in fat_table-0.6.2 vs lib/fat_table/table.rb in fat_table-0.6.3

@@ -950,23 +950,28 @@
         new_cols.each_pair do |key, expr|
           key = key.as_sym
           vars = old_row.merge(new_row)
           case expr
           when Symbol
-            msg = "Column '#{expr}' in select does not exist"
+            msg = "select column '#{expr}' does not exist"
             raise UserError, msg unless vars.key?(expr)
 
             new_row[key] = vars[expr]
           when String
-            new_row[key] = ev.evaluate(expr, locals: vars)
+            if expr.match?(/\A\s*:/)
+              # Leading colon signal a literal string
+              new_row[key] = expr.sub(/\A\s*:/, '')
+            else
+              # Otherwise, evaluate the string.
+              new_row[key] = ev.evaluate(expr, locals: vars)
+            end
+          when Numeric, DateTime, Date, TrueClass, FalseClass
+            new_row[key] = expr
           else
-            msg = "Hash parameter '#{key}' to select must be a symbol or string"
+            msg = "select can't set column at '#{key}' to '#{expr}' of class #{expr.class}"
             raise UserError, msg
           end
         end
-        # Set the group number and run the hook with the local variables set to
-        # the row after the new row is evaluated.
-        # vars = new_row.merge(__group: grp)
         ev.eval_after_hook(locals: new_row)
         result << new_row
       end
       result.explicit_boundaries = explicit_boundaries
       result.normalize_boundaries