From 73227bbafd8e5760ce7a0ce28bcb6d3716ab64ab Mon Sep 17 00:00:00 2001
From: tison <wander4096@gmail.com>
Date: Mon, 11 Dec 2023 10:27:22 +0800
Subject: [PATCH] chore: ignore MySQL client sent SELECT $$ (#2896)

Signed-off-by: tison <wander4096@gmail.com>
---
 src/servers/src/mysql/federated.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/servers/src/mysql/federated.rs b/src/servers/src/mysql/federated.rs
index 80d0cb54ab..ca4948d665 100644
--- a/src/servers/src/mysql/federated.rs
+++ b/src/servers/src/mysql/federated.rs
@@ -80,6 +80,9 @@ static OTHER_NOT_SUPPORTED_STMT: Lazy<RegexSet> = Lazy::new(|| {
         "(?i)^(SHOW COLLATION)",
         "(?i)^(SHOW CHARSET)",
 
+        // mysqlclient.
+        "(?i)^(SELECT \\$\\$)",
+
         // mysqldump.
         "(?i)^(SET SESSION(.*))",
         "(?i)^(SET SQL_QUOTE_SHOW_CREATE(.*))",