diff --git a/src/graph/ShowExecutor.cpp b/src/graph/ShowExecutor.cpp
index ea78afff330..213843da50e 100644
--- a/src/graph/ShowExecutor.cpp
+++ b/src/graph/ShowExecutor.cpp
@@ -635,19 +635,18 @@ void ShowExecutor::showCreateTag() {
             buf.resize(buf.size() -2);
             buf += "\n";
         }
-        buf += ") ";
+        buf += ")";
         nebula::cpp2::SchemaProp prop = schema.schema_prop;
-        buf += "ttl_duration = ";
+        bool seprate = false;
         if (prop.get_ttl_duration()) {
+            seprate = true;
+            buf += " ttl_duration = ";
             buf += folly::to<std::string>(*prop.get_ttl_duration());
-        } else {
-            buf += "0";
         }
-        buf += ", ttl_col = ";
         if (prop.get_ttl_col() && !(prop.get_ttl_col()->empty())) {
+            if (seprate) buf += ",";
+            buf += " ttl_col = ";
             buf += *prop.get_ttl_col();
-        } else {
-            buf += "\"\"";
         }
 
         row[1].set_str(buf);
@@ -733,19 +732,18 @@ void ShowExecutor::showCreateEdge() {
             buf.resize(buf.size() -2);
             buf += "\n";
         }
-        buf += ") ";
+        buf += ")";
         nebula::cpp2::SchemaProp prop = schema.schema_prop;
-        buf += "ttl_duration = ";
+        bool seprate = false;
         if (prop.get_ttl_duration()) {
+            buf += " ttl_duration = ";
             buf += folly::to<std::string>(*prop.get_ttl_duration());
-        } else {
-            buf += "0";
+            seprate = true;
         }
-        buf += ", ttl_col = ";
         if (prop.get_ttl_col() && !(prop.get_ttl_col()->empty())) {
+            if (seprate) buf += ",";
+            buf += " ttl_col = ";
             buf += *prop.get_ttl_col();
-        } else {
-            buf += "\"\"";
         }
 
         row[1].set_str(buf);
diff --git a/src/graph/test/IndexTest.cpp b/src/graph/test/IndexTest.cpp
index 190bfca81ed..5ab3f3d91bc 100644
--- a/src/graph/test/IndexTest.cpp
+++ b/src/graph/test/IndexTest.cpp
@@ -404,14 +404,14 @@ TEST_F(IndexTest, TagIndexTTL) {
     // Alter tag add ttl property on index col, failed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER TAG person_ttl ttl_duration = 100, ttl_col = \"age\"";
+        std::string query = "ALTER TAG person_ttl ttl_duration = 100, ttl_col = age";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
     // Alter tag add ttl property on not index col, failed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER TAG person_ttl ttl_duration = 100, ttl_col = \"gender\"";
+        std::string query = "ALTER TAG person_ttl ttl_duration = 100, ttl_col = gender";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -425,14 +425,14 @@ TEST_F(IndexTest, TagIndexTTL) {
     // Alter tag add ttl property on index col, succeed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER TAG person_ttl ttl_duration = 100, ttl_col = \"age\"";
+        std::string query = "ALTER TAG person_ttl CHANGE ttl_duration = 100, ttl_col = age";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
     // Alter tag add ttl property on not index col, succeed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER TAG person_ttl ttl_duration = 100, ttl_col = \"gender\"";
+        std::string query = "ALTER TAG person_ttl CHANGE ttl_duration = 100, ttl_col = gender";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -453,7 +453,7 @@ TEST_F(IndexTest, TagIndexTTL) {
     // Drop ttl propery
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER TAG person_ttl  ttl_col = \"\"";
+        std::string query = "ALTER TAG person_ttl DROP TTL";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -474,7 +474,7 @@ TEST_F(IndexTest, TagIndexTTL) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE TAG person_ttl_2(name string, age int, gender string)"
-                " ttl_duration = 200, ttl_col = \"age\"";
+                " ttl_duration = 200, ttl_col = age";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -548,14 +548,14 @@ TEST_F(IndexTest, EdgeIndexTTL) {
     // Alter edge add ttl property on index col, failed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER edge friend_ttl ttl_duration = 100, ttl_col = \"start_time\"";
+        std::string query = "ALTER edge friend_ttl ttl_duration = 100, ttl_col = start_time";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
     // Alter edge add ttl property on not index col, failed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER edge friend_ttl ttl_duration = 100, ttl_col = \"degree\"";
+        std::string query = "ALTER edge friend_ttl ttl_duration = 100, ttl_col = degree";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -569,14 +569,14 @@ TEST_F(IndexTest, EdgeIndexTTL) {
     // Alter edge add ttl property on index col, succeed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER edge friend_ttl ttl_duration = 100, ttl_col = \"start_time\"";
+        std::string query = "ALTER edge friend_ttl CHANGE ttl_duration = 100, ttl_col = start_time";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
     // Alter edge add ttl property on not index col, succeed
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER edge friend_ttl ttl_duration = 100, ttl_col = \"degree\"";
+        std::string query = "ALTER edge friend_ttl CHANGE ttl_duration = 100, ttl_col = degree";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -597,7 +597,7 @@ TEST_F(IndexTest, EdgeIndexTTL) {
     // Drop ttl propery
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER EDGE friend_ttl ttl_col = \"\"";
+        std::string query = "ALTER EDGE friend_ttl DROP TTL";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -619,7 +619,7 @@ TEST_F(IndexTest, EdgeIndexTTL) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE EDGE friend_ttl_2(degree int, start_time int)"
-                " ttl_duration = 200, ttl_col = \"start_time\"";
+                " ttl_duration = 200, ttl_col = start_time";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
diff --git a/src/graph/test/SchemaTest.cpp b/src/graph/test/SchemaTest.cpp
index ce41b10fde3..eb61531fdb6 100644
--- a/src/graph/test/SchemaTest.cpp
+++ b/src/graph/test/SchemaTest.cpp
@@ -519,7 +519,7 @@ TEST_F(SchemaTest, TestTagAndEdge) {
                                "  age int,\n"
                                "  gender string,\n"
                                "  row_timestamp timestamp\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";
+                               ")";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"person", createTagStr},
         };
@@ -611,7 +611,7 @@ TEST_F(SchemaTest, TestTagAndEdge) {
                                "  row_timestamp timestamp,\n"
                                "  col1 int,\n"
                                "  col2 string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";
+                               ")";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"person", createTagStr},
         };
@@ -729,7 +729,7 @@ TEST_F(SchemaTest, TestTagAndEdge) {
         std::string createEdgeStr = "CREATE EDGE buy (\n"
                                    "  id int,\n"
                                    "  time string\n"
-                                   ") ttl_duration = 0, ttl_col = \"\"";
+                                   ")";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"buy", createEdgeStr},
         };
@@ -892,7 +892,7 @@ TEST_F(SchemaTest, TestTagAndEdge) {
                                    "  school int,\n"
                                    "  col1 int,\n"
                                    "  col2 string\n"
-                                   ") ttl_duration = 0, ttl_col = \"\"";
+                                   ")";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"education", createEdgeStr},
         };
@@ -1124,7 +1124,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  age int,\n"
                                "  gender string,\n"
                                "  row_timestamp timestamp\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";
+                               ")";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"person", createTagStr},
         };
@@ -1134,7 +1134,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE TAG man(name string, email string, "
                             "age int, gender string, row_timestamp timestamp)"
-                            "ttl_duration = 100, ttl_col = \"row_timestamp\"";
+                            "ttl_duration = 100, ttl_col = row_timestamp";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1170,7 +1170,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE TAG woman(name string, email string, "
                             "age int, gender string, row_timestamp timestamp)"
-                            "ttl_col = \"name\"";
+                            "ttl_col = name";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1179,7 +1179,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE TAG woman(name string, email string, "
                             "age int, gender string, row_timestamp timestamp)"
-                            "ttl_duration = -100, ttl_col = \"row_timestamp\"";
+                            "ttl_duration = -100, ttl_col = row_timestamp";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1205,7 +1205,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE TAG only_ttl_col(name string, email string, "
                             "age int, gender string, row_timestamp timestamp)"
-                            "ttl_col = \"row_timestamp\"";
+                            "ttl_col = row_timestamp";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1220,7 +1220,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  age int,\n"
                                "  gender string,\n"
                                "  row_timestamp timestamp\n"
-                               ") ttl_duration = 0, ttl_col = row_timestamp";
+                               ") ttl_col = row_timestamp";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"only_ttl_col", createTagStr},
         };
@@ -1229,7 +1229,7 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER TAG woman "
-                            "ttl_duration = 50, ttl_col = \"row_timestamp\"";
+                            "CHANGE ttl_duration = 50, ttl_col = row_timestamp";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1254,14 +1254,14 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER TAG woman "
-                            "ttl_col = \"name\"";
+                            "CHANGE ttl_col = name";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER TAG woman "
-                            "Drop (name) ttl_duration = 200";
+                            "Drop (name) CHANGE ttl_duration = 200";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1299,7 +1299,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  email string,\n"
                                "  age int,\n"
                                "  gender string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";
+                               ") ttl_duration = 0";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"woman", createTagStr},
         };
@@ -1309,7 +1309,7 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER TAG woman "
-                            "ttl_duration = 100, ttl_col = \"age\"";
+                            "CHANGE ttl_duration = 100, ttl_col = age";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1339,7 +1339,7 @@ TEST_F(SchemaTest, TTLtest) {
     // Drop ttl property
     {
         cpp2::ExecutionResponse resp;
-        std::string query = "ALTER TAG woman ttl_col = \"\" ";
+        std::string query = "ALTER TAG woman DROP TTL";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1352,7 +1352,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  email string,\n"
                                "  age int,\n"
                                "  gender string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";;
+                               ") ttl_duration = 0";;
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"woman", createTagStr},
         };
@@ -1375,7 +1375,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  email string,\n"
                                "  age string,\n"
                                "  gender string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";;
+                               ") ttl_duration = 0";;
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"woman", createTagStr},
         };
@@ -1408,7 +1408,7 @@ TEST_F(SchemaTest, TTLtest) {
         std::string createEdgeStr = "CREATE EDGE work (\n"
                                "  number string,\n"
                                "  start_time timestamp\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";
+                               ")";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"work", createEdgeStr},
         };
@@ -1418,7 +1418,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE EDGE work1(name string, email string, "
                             "age int, gender string, row_timestamp timestamp)"
-                            "ttl_duration = 100, ttl_col = \"row_timestamp\"";
+                            "ttl_duration = 100, ttl_col = row_timestamp";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1452,7 +1452,7 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE EDGE work2(number string, start_time timestamp)"
-                            "ttl_col = \"name\"";
+                            "ttl_col = name";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1461,7 +1461,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE EDGE work2(name string, email string, "
                             "age int, gender string, start_time timestamp)"
-                            "ttl_duration = -100, ttl_col = \"start_time\"";
+                            "ttl_duration = -100, ttl_col = start_time";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1487,7 +1487,7 @@ TEST_F(SchemaTest, TTLtest) {
         cpp2::ExecutionResponse resp;
         std::string query = "CREATE EDGE edge_only_ttl_col(name string, email string, "
                             "age int, gender string, row_timestamp timestamp)"
-                            "ttl_col = \"row_timestamp\"";
+                            "ttl_col = row_timestamp";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1502,7 +1502,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  age int,\n"
                                "  gender string,\n"
                                "  row_timestamp timestamp\n"
-                               ") ttl_duration = 0, ttl_col = row_timestamp";
+                               ") ttl_col = row_timestamp";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"edge_only_ttl_col", createEdgeStr},
         };
@@ -1511,7 +1511,7 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER EDGE work2 "
-                            "ttl_duration = 50, ttl_col = \"start_time\"";
+                            "CHANGE ttl_duration = 50, ttl_col = start_time";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1537,14 +1537,14 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER EDGE work2 "
-                            "ttl_col = \"name\"";
+                            "CHANGE ttl_col = name";
         auto code = client->execute(query, resp);
         ASSERT_NE(cpp2::ErrorCode::SUCCEEDED, code);
     }
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER EDGE work2 "
-                            "Drop (name) ttl_duration = 200";
+                            "Drop (name) CHANGE ttl_duration = 200";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1581,7 +1581,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  email string,\n"
                                "  age int,\n"
                                "  gender string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";
+                               ") ttl_duration = 0";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"work2", createEdgeStr},
         };
@@ -1591,7 +1591,7 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER Edge work2 "
-                            "ttl_duration = 100, ttl_col = \"age\"";
+                            "CHANGE ttl_duration = 100, ttl_col = age";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1622,7 +1622,7 @@ TEST_F(SchemaTest, TTLtest) {
     {
         cpp2::ExecutionResponse resp;
         std::string query = "ALTER EDGE work2 "
-                            "ttl_col = \"\"";
+                            "DROP TTL";
         auto code = client->execute(query, resp);
         ASSERT_EQ(cpp2::ErrorCode::SUCCEEDED, code);
     }
@@ -1635,7 +1635,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  email string,\n"
                                "  age int,\n"
                                "  gender string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";;
+                               ") ttl_duration = 0";
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"work2", createTagStr},
         };
@@ -1658,7 +1658,7 @@ TEST_F(SchemaTest, TTLtest) {
                                "  email string,\n"
                                "  age string,\n"
                                "  gender string\n"
-                               ") ttl_duration = 0, ttl_col = \"\"";;
+                               ") ttl_duration = 0";;
         std::vector<uniform_tuple_t<std::string, 2>> expected{
             {"work2", createTagStr},
         };
diff --git a/src/parser/parser.yy b/src/parser/parser.yy
index d5ed57f1bb2..58e6d1a663d 100644
--- a/src/parser/parser.yy
+++ b/src/parser/parser.yy
@@ -76,10 +76,8 @@ class GraphScanner;
     nebula::WithUserOptItem                *with_user_opt_item;
     nebula::RoleTypeClause                 *role_type_clause;
     nebula::AclItemClause                  *acl_item_clause;
-    nebula::SchemaPropList                 *create_schema_prop_list;
-    nebula::SchemaPropItem                 *create_schema_prop_item;
-    nebula::SchemaPropList                 *alter_schema_prop_list;
-    nebula::SchemaPropItem                 *alter_schema_prop_item;
+    nebula::SchemaPropList                 *schema_prop_list;
+    nebula::SchemaPropItem                 *schema_prop_item;
     nebula::OrderFactor                    *order_factor;
     nebula::OrderFactors                   *order_factors;
     nebula::ConfigModule                    config_module;
@@ -175,10 +173,8 @@ class GraphScanner;
 %type <space_opt_item> space_opt_item
 %type <alter_schema_opt_list> alter_schema_opt_list
 %type <alter_schema_opt_item> alter_schema_opt_item
-%type <create_schema_prop_list> create_schema_prop_list opt_create_schema_prop_list
-%type <create_schema_prop_item> create_schema_prop_item
-%type <alter_schema_prop_list> alter_schema_prop_list
-%type <alter_schema_prop_item> alter_schema_prop_item
+%type <schema_prop_list> schema_prop_list opt_schema_prop_list alter_schema_prop_list
+%type <schema_prop_item> schema_prop_item
 %type <order_factor> order_factor
 %type <order_factors> order_factors
 %type <config_module> config_module_enum
@@ -985,27 +981,39 @@ opt_if_exists
     | KW_IF KW_EXISTS { $$=true; }
     ;
 
-opt_create_schema_prop_list
+opt_schema_prop_list
     : %empty {
         $$ = nullptr;
     }
-    | create_schema_prop_list {
+    | schema_prop_list {
         $$ = $1;
     }
     ;
 
-create_schema_prop_list
-    : create_schema_prop_item {
+alter_schema_prop_list
+    // We treat empty ttl_col as drop
+    : KW_DROP KW_TTL {
+        auto prop = new SchemaPropList();
+        prop->addOpt(new SchemaPropItem(SchemaPropItem::PropType::TTL_COL, std::string()));
+        $$ = prop;
+    }
+    | KW_CHANGE schema_prop_list {
+        $$ = $2;
+    }
+    ;
+
+schema_prop_list
+    : schema_prop_item {
         $$ = new SchemaPropList();
         $$->addOpt($1);
     }
-    | create_schema_prop_list COMMA create_schema_prop_item {
+    | schema_prop_list COMMA schema_prop_item {
         $$ = $1;
         $$->addOpt($3);
     }
     ;
 
-create_schema_prop_item
+schema_prop_item
     : KW_TTL_DURATION ASSIGN unary_integer {
         // Less than or equal to 0 means infinity, so less than 0 is equivalent to 0
         if ($3 < 0) {
@@ -1013,26 +1021,26 @@ create_schema_prop_item
         }
         $$ = new SchemaPropItem(SchemaPropItem::TTL_DURATION, $3);
     }
-    | KW_TTL_COL ASSIGN STRING {
+    | KW_TTL_COL ASSIGN name_label {
         $$ = new SchemaPropItem(SchemaPropItem::TTL_COL, *$3);
         delete $3;
     }
     ;
 
 create_tag_sentence
-    : KW_CREATE KW_TAG opt_if_not_exists name_label L_PAREN R_PAREN opt_create_schema_prop_list {
+    : KW_CREATE KW_TAG opt_if_not_exists name_label L_PAREN R_PAREN opt_schema_prop_list {
         if ($7 == nullptr) {
             $7 = new SchemaPropList();
         }
         $$ = new CreateTagSentence($4, new ColumnSpecificationList(), $7, $3);
     }
-    | KW_CREATE KW_TAG opt_if_not_exists name_label L_PAREN column_spec_list R_PAREN opt_create_schema_prop_list {
+    | KW_CREATE KW_TAG opt_if_not_exists name_label L_PAREN column_spec_list R_PAREN opt_schema_prop_list {
         if ($8 == nullptr) {
             $8 = new SchemaPropList();
         }
         $$ = new CreateTagSentence($4, $6, $8, $3);
     }
-    | KW_CREATE KW_TAG opt_if_not_exists name_label L_PAREN column_spec_list COMMA R_PAREN opt_create_schema_prop_list {
+    | KW_CREATE KW_TAG opt_if_not_exists name_label L_PAREN column_spec_list COMMA R_PAREN opt_schema_prop_list {
         if ($9 == nullptr) {
             $9 = new SchemaPropList();
         }
@@ -1075,45 +1083,20 @@ alter_schema_opt_item
     }
     ;
 
-alter_schema_prop_list
-    : alter_schema_prop_item {
-        $$ = new SchemaPropList();
-        $$->addOpt($1);
-    }
-    | alter_schema_prop_list COMMA alter_schema_prop_item {
-        $$ = $1;
-        $$->addOpt($3);
-    }
-    ;
-
-alter_schema_prop_item
-    : KW_TTL_DURATION ASSIGN unary_integer {
-        // Less than or equal to 0 means infinity, so less than 0 is equivalent to 0
-        if ($3 < 0) {
-            $3 = 0;
-        }
-        $$ = new SchemaPropItem(SchemaPropItem::TTL_DURATION, $3);
-    }
-    | KW_TTL_COL ASSIGN STRING {
-        $$ = new SchemaPropItem(SchemaPropItem::TTL_COL, *$3);
-        delete $3;
-    }
-    ;
-
 create_edge_sentence
-    : KW_CREATE KW_EDGE opt_if_not_exists name_label L_PAREN R_PAREN opt_create_schema_prop_list {
+    : KW_CREATE KW_EDGE opt_if_not_exists name_label L_PAREN R_PAREN opt_schema_prop_list {
         if ($7 == nullptr) {
             $7 = new SchemaPropList();
         }
         $$ = new CreateEdgeSentence($4,  new ColumnSpecificationList(), $7, $3);
     }
-    | KW_CREATE KW_EDGE opt_if_not_exists name_label L_PAREN column_spec_list R_PAREN opt_create_schema_prop_list {
+    | KW_CREATE KW_EDGE opt_if_not_exists name_label L_PAREN column_spec_list R_PAREN opt_schema_prop_list {
         if ($8 == nullptr) {
             $8 = new SchemaPropList();
         }
         $$ = new CreateEdgeSentence($4, $6, $8, $3);
     }
-    | KW_CREATE KW_EDGE opt_if_not_exists name_label L_PAREN column_spec_list COMMA R_PAREN opt_create_schema_prop_list {
+    | KW_CREATE KW_EDGE opt_if_not_exists name_label L_PAREN column_spec_list COMMA R_PAREN opt_schema_prop_list {
         if ($9 == nullptr) {
             $9 = new SchemaPropList();
         }
diff --git a/src/parser/scanner.lex b/src/parser/scanner.lex
index 2169bebe1a3..0b1d730d074 100644
--- a/src/parser/scanner.lex
+++ b/src/parser/scanner.lex
@@ -111,6 +111,7 @@ ON                          ([Oo][Nn])
 ROLES                       ([Rr][Oo][Ll][Ee][Ss])
 BY                          ([Bb][Yy])
 IN                          ([Ii][Nn])
+TTL                         ([Tt][Tt][Ll])
 TTL_DURATION                ([Tt][Tt][Ll][_][Dd][Uu][Rr][Aa][Tt][Ii][Oo][Nn])
 TTL_COL                     ([Tt][Tt][Ll][_][Cc][Oo][Ll])
 DOWNLOAD                    ([Dd][Oo][Ww][Nn][Ll][Oo][Aa][Dd])
@@ -257,6 +258,7 @@ RECOVER                     ([Rr][Ee][Cc][Oo][Vv][Ee][Rr])
 {ROLES}                     { return TokenType::KW_ROLES; }
 {BY}                        { return TokenType::KW_BY; }
 {IN}                        { return TokenType::KW_IN; }
+{TTL}                       { return TokenType::KW_TTL; }
 {TTL_DURATION}              { return TokenType::KW_TTL_DURATION; }
 {TTL_COL}                   { return TokenType::KW_TTL_COL; }
 {DOWNLOAD}                  { return TokenType::KW_DOWNLOAD; }
diff --git a/src/parser/test/ParserTest.cpp b/src/parser/test/ParserTest.cpp
index 7b83f076731..6512fc575a2 100644
--- a/src/parser/test/ParserTest.cpp
+++ b/src/parser/test/ParserTest.cpp
@@ -196,7 +196,7 @@ TEST(Parser, TagOperation) {
         GQLParser parser;
         std::string query = "CREATE TAG woman(name string, age int, "
                             "married bool, salary double, create_time timestamp)"
-                            "ttl_duration = 100, ttl_col = \"create_time\"";
+                            "ttl_duration = 100, ttl_col = create_time";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
@@ -225,26 +225,52 @@ TEST(Parser, TagOperation) {
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
+        // Drop ttl
         GQLParser parser;
-        std::string query = "ALTER TAG man ttl_duration = 200";
+        std::string query = "ALTER TAG person "
+                            "DROP TTL";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
+        // Change ttl
         GQLParser parser;
-        std::string query = "ALTER TAG man ttl_col = \"\"";
+        std::string query = "ALTER TAG person "
+                            "CHANGE TTL_COL = field1";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
+        // Change ttl
         GQLParser parser;
-        std::string query = "ALTER TAG woman ttl_duration = 50, ttl_col = \"age\"";
+        std::string query = "ALTER TAG person "
+                            "CHANGE TTL_DURATION = 233";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
+        // Change ttl
         GQLParser parser;
-        std::string query = "ALTER TAG woman ADD (col6 int) ttl_duration = 200";
+        std::string query = "ALTER TAG person "
+                            "CHANGE TTL_DURATION = 233, TTL_COL = field1";
+        auto result = parser.parse(query);
+        ASSERT_TRUE(result.ok()) << result.status();
+    }
+    {
+        GQLParser parser;
+        std::string query = "ALTER TAG man CHANGE ttl_duration = 200";
+        auto result = parser.parse(query);
+        ASSERT_TRUE(result.ok()) << result.status();
+    }
+    {
+        GQLParser parser;
+        std::string query = "ALTER TAG woman CHANGE ttl_duration = 50, ttl_col = age";
+        auto result = parser.parse(query);
+        ASSERT_TRUE(result.ok()) << result.status();
+    }
+    {
+        GQLParser parser;
+        std::string query = "ALTER TAG woman ADD (col6 int) CHANGE ttl_duration = 200";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
@@ -308,7 +334,7 @@ TEST(Parser, EdgeOperation) {
         GQLParser parser;
         std::string query = "CREATE EDGE woman(name string, age int, "
                             "married bool, salary double, create_time timestamp)"
-                            "ttl_duration = 100, ttl_col = \"create_time\"";
+                            "ttl_duration = 100, ttl_col = create_time";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
@@ -322,25 +348,25 @@ TEST(Parser, EdgeOperation) {
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE man ttl_duration = 200";
+        std::string query = "ALTER EDGE man CHANGE ttl_duration = 200";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE man ttl_col = \"\"";
+        std::string query = "ALTER EDGE man DROP TTL";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE woman ttl_duration = 50, ttl_col = \"age\"";
+        std::string query = "ALTER EDGE woman CHANGE ttl_duration = 50, ttl_col = age";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE woman ADD (col6 int)  ttl_duration = 200";
+        std::string query = "ALTER EDGE woman ADD (col6 int) CHANGE ttl_duration = 200";
         auto result = parser.parse(query);
         ASSERT_TRUE(result.ok()) << result.status();
     }
@@ -423,19 +449,19 @@ TEST(Parser, ColumnSpacesTest) {
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE woman ADD (col6)  ttl_duration = 200";
+        std::string query = "ALTER EDGE woman ADD (col6) CHANGE ttl_duration = 200";
         auto result = parser.parse(query);
         ASSERT_FALSE(result.ok());
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE woman CHANGE (col6)  ttl_duration = 200";
+        std::string query = "ALTER EDGE woman CHANGE (col6) CHANGE ttl_duration = 200";
         auto result = parser.parse(query);
         ASSERT_FALSE(result.ok());
     }
     {
         GQLParser parser;
-        std::string query = "ALTER EDGE woman DROP (col6 int)  ttl_duration = 200";
+        std::string query = "ALTER EDGE woman DROP (col6 int) CHANGE ttl_duration = 200";
         auto result = parser.parse(query);
         ASSERT_FALSE(result.ok());
     }