lwz9103 commented on code in PR #6992:
URL: https://github.com/apache/incubator-gluten/pull/6992#discussion_r1730958180


##########
cpp-ch/local-engine/Functions/SparkFunctionTrim.cpp:
##########
@@ -106,125 +106,114 @@ namespace
         ColumnPtr
         executeImpl(const ColumnsWithTypeAndName & arguments, const 
DataTypePtr & /*result_type*/, size_t input_rows_count) const override
         {
-            const ColumnString * src_str_col = 
checkAndGetColumn<ColumnString>(arguments[0].column.get());
-            if (!src_str_col)
-                throw Exception(ErrorCodes::ILLEGAL_COLUMN, "First argument of 
function {} must be String", getName());
+            const ColumnString * src_col = 
checkAndGetColumn<ColumnString>(arguments[0].column.get());
+            const ColumnConst * src_const_col = 
checkAndGetColumnConst<ColumnString>(arguments[0].column.get());
+            const ColumnString * trim_col = 
checkAndGetColumn<ColumnString>(arguments[1].column.get());
+            const ColumnConst * trim_const_col = 
checkAndGetColumnConst<ColumnString>(arguments[1].column.get());
+
+            String src_const_str;
+            String trim_const_str;
+            if (src_const_col)
+                src_const_str = src_const_col->getValue<String>();
+            if (trim_const_col)
+                trim_const_str = trim_const_col->getValue<String>();
+            if (trim_const_col && trim_const_str.empty()) {

Review Comment:
   A nice tip.



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