From 1cf0256d576f95ada65bb8a84108a71f9c41dd73 Mon Sep 17 00:00:00 2001
From: Jensen <jensenojs@qq.com>
Date: Mon, 25 Dec 2023 11:01:52 +0800
Subject: [PATCH] set cwft all member to nil

---
 pkg/frontend/computation_wrapper.go | 9 +++++++++
 pkg/frontend/mysql_cmd_executor.go  | 1 +
 2 files changed, 10 insertions(+)

diff --git a/pkg/frontend/computation_wrapper.go b/pkg/frontend/computation_wrapper.go
index 92268c84e7474..fe35016af9dbb 100644
--- a/pkg/frontend/computation_wrapper.go
+++ b/pkg/frontend/computation_wrapper.go
@@ -109,6 +109,15 @@ func (cwft *TxnComputationWrapper) GetAst() tree.Statement {
 	return cwft.stmt
 }
 
+func (cwft *TxnComputationWrapper) FreeAst() {
+	// cwft.plan = nil
+	// cwft.proc = nil
+	// cwft.ses = nil
+	// cwft.compile = nil
+	// cwft.runResult = nil
+	// cwft.stmt = nil
+}
+
 func (cwft *TxnComputationWrapper) GetProcess() *process.Process {
 	return cwft.proc
 }
diff --git a/pkg/frontend/mysql_cmd_executor.go b/pkg/frontend/mysql_cmd_executor.go
index 7429eb2011f2a..11b6f952fffc7 100644
--- a/pkg/frontend/mysql_cmd_executor.go
+++ b/pkg/frontend/mysql_cmd_executor.go
@@ -3915,6 +3915,7 @@ func (mce *MysqlCmdExecutor) doComQuery(requestCtx context.Context, input *UserI
 				plans[i] = cwft.plan
 				stmts[i] = cwft.stmt
 			} else {
+				cwft.FreeAst()
 				return nil
 			}
 		}