From a83626c8af0428d2b35dab481fff7e569a6f47b4 Mon Sep 17 00:00:00 2001
From: Jakub Vrana <jakub@vrana.cz>
Date: Thu, 10 Apr 2025 17:58:15 +0200
Subject: [PATCH] Fix import without primary key (fix #1017, regression from
 5.1.1)

---
 CHANGELOG.md           | 1 +
 adminer/select.inc.php | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9ad0f8c..6d645e7f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Adminer dev
 - Fix search anywhere (bug #1004, regression from 5.1.1)
+- Fix import without primary key (bug #1017, regression from 5.1.1)
 
 ## Adminer 5.2.0 (released 2025-04-08)
 - Autocomplete SQL commands
diff --git a/adminer/select.inc.php b/adminer/select.inc.php
index 84077661..46f53605 100644
--- a/adminer/select.inc.php
+++ b/adminer/select.inc.php
@@ -54,7 +54,7 @@ if ($_GET["val"] && is_ajax()) {
 	exit;
 }
 
-$primary = $unselected = null;
+$primary = $unselected = array();
 foreach ($indexes as $index) {
 	if ($index["type"] == "PRIMARY") {
 		$primary = array_flip($index["columns"]);