From f4ddbd3084b65a3ed79e0b9ba07baac1102fb6f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20=C3=96sterreicher?= <oesi@technikum-wien.at>
Date: Fri, 25 Jun 2021 11:15:12 +0200
Subject: [PATCH] Added DB-Index for lehre.tbl_pruefung to speed up queries

---
 system/dbupdate_3.3.php | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/system/dbupdate_3.3.php b/system/dbupdate_3.3.php
index e658d7a97..407a4aa24 100644
--- a/system/dbupdate_3.3.php
+++ b/system/dbupdate_3.3.php
@@ -4767,6 +4767,20 @@ if($result = @$db->db_query("SELECT 1 FROM system.tbl_berechtigung WHERE berecht
 	}
 }
 
+// Add index to system.tbl_log
+if ($result = $db->db_query("SELECT * FROM pg_class WHERE relname='idx_tbl_pruefung_student_uid'"))
+{
+	if ($db->db_num_rows($result) == 0)
+	{
+		$qry = "CREATE INDEX idx_tbl_pruefung_student_uid ON lehre.tbl_pruefung USING btree (student_uid)";
+
+		if (! $db->db_query($qry))
+			echo '<strong>Indizes: ' . $db->db_last_error() . '</strong><br>';
+		else
+			echo 'Index fuer lehre.pruefung.student_uid hinzugefuegt<br>';
+	}
+}
+
 // *** Pruefung und hinzufuegen der neuen Attribute und Tabellen
 echo '<H2>Pruefe Tabellen und Attribute!</H2>';