From 91501631267bc622a75c1560002ad74d63527c0d Mon Sep 17 00:00:00 2001
From: Thiago Romano <thiagopromano@gmail.com>
Date: Tue, 10 May 2022 12:01:41 +0200
Subject: [PATCH] Fix Invalid Syntax in Documentation (#402)

The current example gives the following error:

```
** (FunctionClauseError) no function clause matching in Postgrex.DefaultTypes.encode_params/3

    The following arguments were given to Postgrex.DefaultTypes.encode_params/3:

        # 1
        "SET lock_timeout TO '10s'"

        # 2
        []

        # 3
        []

    Attempted function clauses (showing 3 out of 3):

        defp encode_params([param | params], [type | types], encoded)
        defp encode_params([], [], encoded)
        defp encode_params(params, _, _) when is_list(params)
```
---
 lib/ecto/migration.ex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ecto/migration.ex b/lib/ecto/migration.ex
index 3a5794f7..a77ef1aa 100644
--- a/lib/ecto/migration.ex
+++ b/lib/ecto/migration.ex
@@ -306,7 +306,7 @@ defmodule Ecto.Migration do
             use Ecto.Migration
 
             def after_begin() do
-              repo().query! "SET lock_timeout TO '5s'", "SET lock_timeout TO '10s'"
+              repo().query! "SET lock_timeout TO '5s'"
             end
           end
         end