From 4a65703334cc70e24835ce24db5e8c7c99bd9977 Mon Sep 17 00:00:00 2001
From: Peter Knut <peter@pematon.com>
Date: Wed, 29 Jan 2025 23:18:10 +0100
Subject: [PATCH] MariaDB: Fix missing uca1400 collations

Since MariaDB 10.10, one collation can be compatible with more character sets, so collations no longer have unique IDs.

Thanks to @shionryuu (https://github.com/adminerevo/adminerevo/issues/50)
---
 adminer/drivers/mysql.inc.php | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/adminer/drivers/mysql.inc.php b/adminer/drivers/mysql.inc.php
index 789d071b..09a984fb 100644
--- a/adminer/drivers/mysql.inc.php
+++ b/adminer/drivers/mysql.inc.php
@@ -642,8 +642,17 @@ if (isset($_GET["mysql"])) {
 	* @return array
 	*/
 	function collations() {
+		global $connection;
+
 		$return = array();
-		foreach (get_rows("SHOW COLLATION") as $row) {
+
+		// Since MariaDB 10.10, one collation can be compatible with more character sets, so collations no longer have unique IDs.
+		// All combinations can be selected from information_schema.COLLATION_CHARACTER_SET_APPLICABILITY table.
+		$query = min_version('', '10.10', $connection) ?
+			"SELECT CHARACTER_SET_NAME AS Charset, FULL_COLLATION_NAME AS Collation, IS_DEFAULT AS `Default` FROM information_schema.COLLATION_CHARACTER_SET_APPLICABILITY" :
+			"SHOW COLLATION";
+
+		foreach (get_rows($query) as $row) {
 			if ($row["Default"]) {
 				$return[$row["Charset"]][-1] = $row["Collation"];
 			} else {
@@ -651,9 +660,11 @@ if (isset($_GET["mysql"])) {
 			}
 		}
 		ksort($return);
+
 		foreach ($return as $key => $val) {
 			asort($return[$key]);
 		}
+
 		return $return;
 	}