diff --git a/frameworks/libs/distributeddb/common/src/schema_utils.cpp b/frameworks/libs/distributeddb/common/src/schema_utils.cpp
index 22c254748b84f58164325c4fad0f0622180f4f0c..30d707e37b4df20aebc31d1cb0eb59c4557c9142 100644
--- a/frameworks/libs/distributeddb/common/src/schema_utils.cpp
+++ b/frameworks/libs/distributeddb/common/src/schema_utils.cpp
@@ -178,7 +178,7 @@ int SchemaUtils::TransToLong(const std::string &defaultContent, SchemaAttribute
         return -E_SCHEMA_PARSE_FAIL;
     }
     auto defaultPos = defaultContent.find_first_not_of("+- ");
-    if (defaultPos >= defaultContent.size()) {
+    if (defaultPos == std::string::npos) {
         LOGE("Default value without +-");
         return -E_SCHEMA_PARSE_FAIL;
     }
diff --git a/frameworks/libs/distributeddb/test/unittest/common/common/distributeddb_common_test.cpp b/frameworks/libs/distributeddb/test/unittest/common/common/distributeddb_common_test.cpp
index 48bf72fd97d4a4c30199ca8e87b9278b97920176..4bff8b66ede59d904eec74c104f992c3c72cea6c 100644
--- a/frameworks/libs/distributeddb/test/unittest/common/common/distributeddb_common_test.cpp
+++ b/frameworks/libs/distributeddb/test/unittest/common/common/distributeddb_common_test.cpp
@@ -865,5 +865,8 @@ HWTEST_F(DistributedDBCommonTest, SchemaUtilsTest002, TestSize.Level0)
     value = "INTEGER,DEFAULT -10000000000 ";
     errCode = SchemaUtils::ParseAndCheckSchemaAttribute(value, outAttr);
     EXPECT_EQ(errCode, -E_SCHEMA_PARSE_FAIL);
+    value = "INTEGER,DEFAULT +100";
+    errCode = SchemaUtils::ParseAndCheckSchemaAttribute(value, outAttr);
+    EXPECT_EQ(errCode, E_OK);
 }
 }
\ No newline at end of file