diff --git a/sql/auth/sql_authorization.cc b/sql/auth/sql_authorization.cc
index 443b3cece..6167d0e06 100644
--- a/sql/auth/sql_authorization.cc
+++ b/sql/auth/sql_authorization.cc
@@ -4390,7 +4390,8 @@ bool check_fk_parent_table_access(THD *thd,
   // Return if engine does not support Foreign key Constraint.
   if (!ha_check_storage_engine_flag(db_type, HTON_SUPPORTS_FOREIGN_KEYS)) {
     if (db_type == tianmu_hton &&
-        (alter_info->flags & Alter_info::ADD_FOREIGN_KEY)) {
+        (alter_info->flags & Alter_info::ADD_FOREIGN_KEY) &&
+        (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
       my_error(ER_TIANMU_NOT_SUPPORTED_FOREIGN_KEY, MYF(0));
       return true;
     }
diff --git a/sql/sql_class.h b/sql/sql_class.h
index d46c533cd..73e35a69a 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -180,7 +180,8 @@ enum enum_binlog_format {
 #define MODE_NO_ENGINE_SUBSTITUTION     (MODE_HIGH_NOT_PRECEDENCE*2)
 #define MODE_PAD_CHAR_TO_FULL_LENGTH    (1ULL << 31)
 //Force the engine to be tianmu when acting as a slave library
-#define MODE_MANDATORY_TIANMU    (1ULL << 32)
+#define MODE_MANDATORY_TIANMU           (1ULL << 32)
+#define MODE_NO_KEY_ERROR               (1ULL << 33)
 
 /*
   Replication uses 8 bytes to store SQL_MODE in the binary log. The day you
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 59f0259ac..5ab818036 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -3927,21 +3927,24 @@ mysql_prepare_create_table(THD *thd, const char *error_schema_name,
                  (fk_key->name.str ? fk_key->name.str :
                                      "foreign key without name"),
                  ER(ER_KEY_REF_DO_NOT_MATCH_TABLE_REF));
-	DBUG_RETURN(TRUE);
+	      DBUG_RETURN(TRUE);
       }
       continue;
     }
     (*key_count)++;
     tmp=file->max_key_parts();
 
-    if (create_info->db_type->db_type == DB_TYPE_TIANMU) {
+    if ((create_info->db_type->db_type == DB_TYPE_TIANMU) &&
+        (thd->lex->sql_command != SQLCOM_CREATE_TABLE)) {
       if ((file->ha_table_flags() & HA_NON_SECONDARY_KEY) &&
-          key->type == KEYTYPE_MULTIPLE) {
+          (key->type == KEYTYPE_MULTIPLE) &&
+          !(thd->variables.sql_mode & MODE_NO_KEY_ERROR)) {
         my_error(ER_TIANMU_NOT_SUPPORTED_SECONDARY_INDEX, MYF(0));
         DBUG_RETURN(TRUE);
       }
-      if (file->ha_table_flags() & HA_NON_UNIQUE_KEY &&
-          key->type == KEYTYPE_UNIQUE) {
+      if ((file->ha_table_flags() & HA_NON_UNIQUE_KEY) &&
+          (key->type == KEYTYPE_UNIQUE) &&
+          (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
         my_error(ER_TIANMU_NOT_SUPPORTED_UNIQUE_INDEX, MYF(0));
         DBUG_RETURN(TRUE);
       }
@@ -4078,7 +4081,8 @@ mysql_prepare_create_table(THD *thd, const char *error_schema_name,
                      MYF(0));
           DBUG_RETURN(TRUE);
         }
-        if (create_info->db_type->db_type == DB_TYPE_TIANMU) {
+        if ((create_info->db_type->db_type == DB_TYPE_TIANMU) &&
+            (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
           my_message(ER_TIANMU_NOT_SUPPORTED_FULLTEXT_INDEX,
                      ER(ER_TIANMU_NOT_SUPPORTED_FULLTEXT_INDEX), MYF(0));
         } else {
@@ -8493,7 +8497,8 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
     while ((drop=drop_it++)) {
       switch (drop->type) {
       case Alter_drop::KEY:
-        if (create_info->db_type->db_type == DB_TYPE_TIANMU) {
+        if ((create_info->db_type->db_type == DB_TYPE_TIANMU) &&
+            (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
           my_error(ER_TIANMU_NOT_FOUND_INDEX, MYF(0));
           goto err;
         }
@@ -8503,7 +8508,8 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
                  alter_info->drop_list.head()->name);
         goto err;
       case Alter_drop::FOREIGN_KEY:
-        if (create_info->db_type->db_type == DB_TYPE_TIANMU) {
+        if ((create_info->db_type->db_type == DB_TYPE_TIANMU) &&
+            (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
           my_error(ER_TIANMU_NOT_SUPPORTED_FOREIGN_KEY, MYF(0));
         }
         break;
@@ -8517,7 +8523,8 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
   }
   if (rename_key_list.elements)
   {
-    if (create_info->db_type->db_type == DB_TYPE_TIANMU) {
+    if ((create_info->db_type->db_type == DB_TYPE_TIANMU) &&
+        (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
       my_error(ER_TIANMU_NOT_FOUND_INDEX, MYF(0));
     } else {
       my_error(ER_KEY_DOES_NOT_EXITS, MYF(0), rename_key_list.head()->old_name,
diff --git a/sql/sql_trigger.cc b/sql/sql_trigger.cc
index 1e358a019..ccafc6dae 100644
--- a/sql/sql_trigger.cc
+++ b/sql/sql_trigger.cc
@@ -226,7 +226,8 @@ bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
   }
   table= tables->table;
   table->pos_in_table_list= tables;
-  if (table->file && table->file->ht == tianmu_hton) {
+  if ((table->file && table->file->ht == tianmu_hton) &&
+      (!(thd->variables.sql_mode & MODE_NO_KEY_ERROR))) {
     my_error(ER_TIANMU_NOT_SUPPORTED_TRIGGER, MYF(0));
     goto end;
   }
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc
index dd38b60f4..452b2481c 100644
--- a/sql/sys_vars.cc
+++ b/sql/sys_vars.cc
@@ -3904,7 +3904,7 @@ static const char *sql_mode_names[]=
   "STRICT_ALL_TABLES", "NO_ZERO_IN_DATE", "NO_ZERO_DATE",
   "ALLOW_INVALID_DATES", "ERROR_FOR_DIVISION_BY_ZERO", "TRADITIONAL",
   "NO_AUTO_CREATE_USER", "HIGH_NOT_PRECEDENCE", "NO_ENGINE_SUBSTITUTION",
-  "PAD_CHAR_TO_FULL_LENGTH", "MANDATORY_TIANMU",
+  "PAD_CHAR_TO_FULL_LENGTH", "MANDATORY_TIANMU", "NO_KEY_ERROR",
   0
 };
 export bool sql_mode_string_representation(THD *thd, sql_mode_t sql_mode,
diff --git a/storage/tianmu/handler/ha_tianmu.cpp b/storage/tianmu/handler/ha_tianmu.cpp
index 295c633b5..1e2d8d4f9 100644
--- a/storage/tianmu/handler/ha_tianmu.cpp
+++ b/storage/tianmu/handler/ha_tianmu.cpp
@@ -1682,6 +1682,13 @@ enum_alter_inplace_result ha_tianmu::check_if_supported_inplace_alter([[maybe_un
     if (ha_alter_info->handler_flags & Alter_inplace_info::ADD_PK_INDEX ||
         ha_alter_info->handler_flags & Alter_inplace_info::DROP_PK_INDEX)
       DBUG_RETURN(HA_ALTER_INPLACE_NOT_SUPPORTED);
+    // support alter table: mix add/drop key
+    if ((ha_alter_info->handler_flags & Alter_inplace_info::ADD_INDEX ||
+        ha_alter_info->handler_flags & Alter_inplace_info::DROP_INDEX ||
+        ha_alter_info->handler_flags & Alter_inplace_info::ADD_UNIQUE_INDEX ||
+        ha_alter_info->handler_flags & Alter_inplace_info::DROP_UNIQUE_INDEX) &&
+        (ha_thd()->variables.sql_mode & MODE_NO_KEY_ERROR))
+      DBUG_RETURN(HA_ALTER_INPLACE_NOT_SUPPORTED);
 
     DBUG_RETURN(HA_ALTER_ERROR);
   }