From 72a71a710ed608a5d8bc3e3f1a0ae82027945545 Mon Sep 17 00:00:00 2001
From: Downal <469743591@qq.com>
Date: Mon, 29 May 2023 17:06:29 +0800
Subject: [PATCH] fix(tianmu): provide error information for "create constraint
 and foreign keys"(not supported)

---
 share/messages_to_clients.txt | 3 +++
 sql/sql_table.cc              | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/share/messages_to_clients.txt b/share/messages_to_clients.txt
index 0270bf922..b80d9a683 100644
--- a/share/messages_to_clients.txt
+++ b/share/messages_to_clients.txt
@@ -9806,6 +9806,9 @@ ER_CREATE_SELECT_WITH_GIPK_DISALLOWED_IN_SBR
 ER_DA_EXPIRE_LOGS_DAYS_IGNORED
   eng "The option expire_logs_days cannot be used together with option binlog_expire_logs_seconds. To set one, first unset the other by setting it to 0."
 
+ER_TIANMU_NOT_SUPPORTED_FOREIGN_KEY
+  eng "Tianmu engine dose not support foreign key."
+
 #
 #  End of 8.0 error messages (server-to-client).
 #  Do NOT add messages intended for the error log above!
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 5f440deb6..133444ffb 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -6514,7 +6514,10 @@ static bool prepare_foreign_key(THD *thd, HA_CREATE_INFO *create_info,
   // the FK has been made, it is enough to check it for new FKs.
   if (fk_key->validate(thd, table_name, alter_info->create_list)) return true;
 
-  if (!se_supports_fks) return false;
+  if (!se_supports_fks) {
+    my_error(ER_TIANMU_NOT_SUPPORTED_FOREIGN_KEY, MYF(0));
+    return true;
+  }
 
   if (fk_key->has_explicit_name) {
     assert(fk_key->name.str);