From 7d882f9aa7b33f88fcf9da6b795685c5821950fd Mon Sep 17 00:00:00 2001
From: Jack Christensen <jack@jackchristensen.com>
Date: Fri, 23 Feb 2024 18:02:28 -0600
Subject: [PATCH] Fix *dbTx.Exec not checking if it is already closed

https://github.com/jackc/pgx/issues/1908
---
 tx.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tx.go b/tx.go
index 2914ada7d..9ecaa17e9 100644
--- a/tx.go
+++ b/tx.go
@@ -264,6 +264,10 @@ func (tx *dbTx) Rollback(ctx context.Context) error {
 
 // Exec delegates to the underlying *Conn
 func (tx *dbTx) Exec(ctx context.Context, sql string, arguments ...interface{}) (commandTag pgconn.CommandTag, err error) {
+	if tx.closed {
+		return pgconn.CommandTag{}, ErrTxClosed
+	}
+
 	return tx.conn.Exec(ctx, sql, arguments...)
 }