From e37213b7b39d4b1653ff46cefcf3f772bb406c8d Mon Sep 17 00:00:00 2001
From: qichang <qichang10@huawei.com>
Date: Mon, 17 Feb 2025 20:06:36 +0800
Subject: [PATCH] fix sys_table analyze error

---
 storage/ctc/ha_ctc.cc | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/storage/ctc/ha_ctc.cc b/storage/ctc/ha_ctc.cc
index ca2d8a4..ccc1b0c 100644
--- a/storage/ctc/ha_ctc.cc
+++ b/storage/ctc/ha_ctc.cc
@@ -3201,12 +3201,29 @@ bool requires_stats_info(enum_sql_command sql_command) {
   }
 }
 
+bool is_sys_table(const char* name) {
+  if (strcmp(name, "information_schema") == 0 ||
+      strcmp(name, "mysql") == 0 ||
+      strcmp(name, "performance_schema") == 0 ||
+      strcmp(name, "sys") == 0) {
+    return true;
+  }
+  return false;
+}
+
 /*
 Handle the statistics are empty case,
 prevent full-table scan by query_sql with where_cond
 */
 ct_errno_t ha_ctc::handle_cbo_stats_empty(THD* thd) {
   ct_errno_t ret = CT_SUCCESS;
+  
+  // sys_table can't analyzed
+  const char* db_name = thd->lex->query_tables->get_db_name();
+  if (is_sys_table(db_name)) {
+    return CT_SUCCESS;
+  }
+
   if (stats.records == 0 && requires_stats_info(thd->lex->sql_command) &&
       thd->lex->query_block->where_cond() != nullptr) {
     std::lock_guard<std::mutex> lock(analyze_mutex);
-- 
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