diff --git a/src/sql/optimizer/ob_optimizer_util.cpp b/src/sql/optimizer/ob_optimizer_util.cpp
index 495320011b..bfd1c351b4 100644
--- a/src/sql/optimizer/ob_optimizer_util.cpp
+++ b/src/sql/optimizer/ob_optimizer_util.cpp
@@ -5654,7 +5654,7 @@ int ret = OB_SUCCESS;
           }
         }
       } else if (ObFloatTC == child_tc || ObDoubleTC == child_tc) {
-        if (child_tc == dst_tc || ObDoubleTC == dst_tc) {
+        if (child_tc == dst_tc) {
           ObAccuracy lossless_acc = child_type.get_accuracy();
           if (dst_acc.get_precision() >= lossless_acc.get_precision() &&
                 dst_acc.get_scale() == lossless_acc.get_scale()) {
@@ -5761,7 +5761,7 @@ int ObOptimizerUtil::is_lossless_column_cast(const ObRawExpr *expr, bool &is_los
           }
         }
       } else if (ObFloatTC == child_tc || ObDoubleTC == child_tc) {
-        if (child_tc == dst_tc || ObDoubleTC == dst_tc) {
+        if (child_tc == dst_tc) {
           ObAccuracy lossless_acc = child_type.get_accuracy();
           if (lossless_acc.get_scale() == dst_acc.get_scale()) {
             is_lossless = true;