Fix casting error for year to bit

src/share/object/ob_obj_cast.cpp

@@ -3400,10 +3400,10 @@ static int year_bit(
   if (OB_UNLIKELY(ObYearTC != in.get_type_class() || ObBitTC != ob_obj_type_class(expect_type))) {
     ret = OB_ERR_UNEXPECTED;
     LOG_ERROR("invalid input type", K(ret), K(in), K(expect_type));
-  } else if (OB_FAIL(year_string(ObVarcharType, params, in, tmp_val, cast_mode))) {
-    LOG_WARN("fail to cast datetime to string", K(ret), K(expect_type), K(in), K(tmp_val));
-  } else if (OB_FAIL(string_bit(expect_type, params, tmp_val, out, cast_mode))) {
-    LOG_WARN("fail to cast string to bit", K(ret), K(expect_type), K(in), K(tmp_val));
+  } else if (OB_FAIL(year_int(ObIntType, params, in, tmp_val, cast_mode))) {
+    LOG_WARN("fail to cast datetime to int", K(ret), K(expect_type), K(in), K(tmp_val));
+  } else if (OB_FAIL(int_bit(expect_type, params, tmp_val, out, cast_mode))) {
+    LOG_WARN("fail to cast int to bit", K(ret), K(expect_type), K(in), K(tmp_val));
   }
   return ret;
 }

src/sql/engine/expr/ob_datum_cast.cpp

@@ -3273,16 +3273,12 @@ CAST_FUNC_NAME(year, bit)
 {
   EVAL_ARG()
   {
-    char buf[OB_CAST_TO_VARCHAR_MAX_LENGTH] = {0};
-    int64_t len = 0;
+    int64_t year_int = 0;
     uint8_t in_val = child_res->get_uint8();
-    if (OB_FAIL(ObTimeConverter::year_to_str(in_val, buf, sizeof(buf), len))) {
-      LOG_WARN("year_to_str failed", K(ret));
-    } else {
-      ObString in_str(len, buf);
-      if (OB_FAIL(common_string_bit(expr, in_str, ctx, res_datum))) {
-        LOG_WARN("common_string_bit failed", K(ret), K(in_str));
-      }
+    if (OB_FAIL(ObTimeConverter::year_to_int(in_val, year_int))) {
+      LOG_WARN("year_to_int failed", K(ret), K(in_val));
+    } else if (OB_FAIL(common_uint_bit(expr, year_int, ctx, res_datum))) {
+      LOG_WARN("common_uint_bit failed", K(ret), K(year_int));
     }
   }
   return ret;