diff --git a/src/share/object/ob_obj_cast.cpp b/src/share/object/ob_obj_cast.cpp
index 9df9657a62e195be2dd1bcf3121d8b90f5c3ffcc..6373d1b39561bf87816931fb94367861a758c189 100644
--- a/src/share/object/ob_obj_cast.cpp
+++ b/src/share/object/ob_obj_cast.cpp
@@ -1603,6 +1603,12 @@ static int float_number(
   if (OB_UNLIKELY(ObFloatTC != in.get_type_class() || ObNumberTC != ob_obj_type_class(expect_type))) {
     ret = OB_ERR_UNEXPECTED;
     LOG_ERROR("invalid input type", K(ret), K(in), K(expect_type));
+  } else if (isnan(value)) {
+    ret = OB_INVALID_NUMERIC;
+    LOG_WARN("float_number failed ", K(ret), K(value));
+  } else if (isinf(value)) {
+    ret = OB_NUMERIC_OVERFLOW;
+    LOG_WARN("float_number failed", K(ret), K(value));
   } else if (ObUNumberType == expect_type && CAST_FAIL(numeric_negative_check(value))) {
   } else {
     char buf[MAX_DOUBLE_STRICT_PRINT_SIZE];
@@ -1902,6 +1908,12 @@ static int double_number(
   if (OB_UNLIKELY(ObDoubleTC != in.get_type_class() || ObNumberTC != ob_obj_type_class(expect_type))) {
     ret = OB_ERR_UNEXPECTED;
     LOG_ERROR("invalid input type", K(ret), K(in), K(expect_type));
+  } else if (isnan(value) && lib::is_oracle_mode()) {
+    ret = OB_INVALID_NUMERIC;
+    LOG_WARN("float_number failed ", K(ret), K(value));
+  } else if (isinf(value) && lib::is_oracle_mode()) {
+    ret = OB_NUMERIC_OVERFLOW;
+    LOG_WARN("float_number failed", K(ret), K(value));
   } else if (ObUNumberType == expect_type && CAST_FAIL(numeric_negative_check(value))) {
   } else {
     char buf[MAX_DOUBLE_STRICT_PRINT_SIZE];
diff --git a/src/sql/engine/expr/ob_expr_operator.cpp b/src/sql/engine/expr/ob_expr_operator.cpp
index 95d9784619d0d5209ad67e7a791097051a687836..e384532957cb174d3ac84bec76c3820a7868b8b2 100644
--- a/src/sql/engine/expr/ob_expr_operator.cpp
+++ b/src/sql/engine/expr/ob_expr_operator.cpp
@@ -1841,7 +1841,7 @@ int ObRelationalExprOperator::calc_result2(
   int ret = OB_SUCCESS;
   // TODO:: raw
   //  bool need_cast = (share::is_oracle_mode() && obj1.get_collation_type() != obj2.get_collation_type());
-  bool need_cast = false;
+  bool need_cast = (share::is_oracle_mode() && obj1.get_type() != obj2.get_type());
   EXPR_DEFINE_CMP_CTX(result_type_.get_calc_meta(), is_null_safe, expr_ctx);
   /*
    * FIX ME,please. It seems that we must check obj1 and obj2 are null or not here
diff --git a/src/sql/engine/expr/ob_expr_power.cpp b/src/sql/engine/expr/ob_expr_power.cpp
index 2a44583d56ff583b68a937187b942133e01704a0..ca964cc81a21776d6efae102f016d0d0a60c0073 100644
--- a/src/sql/engine/expr/ob_expr_power.cpp
+++ b/src/sql/engine/expr/ob_expr_power.cpp
@@ -70,14 +70,8 @@ int ObExprPower::calc(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObExp
   } else if (obj1.is_double() && obj2.is_double()) {
     // same as oracle behavior: if at least one of the arguments is
     // binary_double, result type is double
-    double double_base = obj1.get_double();
-    double double_exponent = obj2.get_double();
-    double result_double = std::pow(double_base, double_exponent);
-    if (isinf(result_double) || isnan(result_double)) {
-      ret = OB_OPERATE_OVERFLOW;
-    } else {
-      result.set_double(result_double);
-    }
+    // keep same with static typing engine.
+    ret = ObExprPow::safe_set_double(result, std::pow(obj1.get_double(), obj2.get_double()));
   } else {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("obj type should be number or double", K(obj1), K(obj2), K(ret));