typo

datafusion/core/src/physical_plan/planner.rs

@@ -711,7 +711,7 @@ impl DefaultPhysicalPlanner {
                             // provided expressions into logical Column expressions if their results
                             // are already provided from the input plans. Because we work with
                             // qualified columns in logical plane, derived columns involve operators or
-                            // functions will contain qualifers as well. This will result in logical
+                            // functions will contain qualifiers as well. This will result in logical
                             // columns with names like `SUM(t1.c1)`, `t1.c1 + t1.c2`, etc.
                             //
                             // If we run these logical columns through physical_name function, we will