- New migration script for changing chk_person_svnr constraint on table tbl_person

- Changed MigrationLib->execQuery for a better output

application/migrations/015_person_svnr.php

@@ -0,0 +1,50 @@
+<?php
+
+if (! defined("BASEPATH")) exit("No direct script access allowed");
+
+require_once APPPATH . "/libraries/MigrationLib.php";
+
+class Migration_Person_svnr extends MigrationLib
+{
+	public function __construct()
+	{
+		parent::__construct();
+	}
+	
+    public function up()
+    {
+		$this->startUP();
+
+		$this->execQuery("ALTER TABLE public.tbl_person DROP CONSTRAINT chk_person_svnr");
+		$this->execQuery(
+			"ALTER TABLE public.tbl_person
+		  ADD CONSTRAINT chk_person_svnr
+				   CHECK (
+						char_length(svnr::text) = 10 OR
+						char_length(svnr::text) = 12 OR
+						char_length(svnr::text) = 16 OR
+						svnr IS NULL
+					)"
+		);
+		
+		$this->endUP();
+	}
+
+    public function down()
+    {
+		$this->startDown();
+
+		$this->execQuery("ALTER TABLE public.tbl_person DROP CONSTRAINT chk_person_svnr");
+		$this->execQuery(
+			"ALTER TABLE public.tbl_person
+		  ADD CONSTRAINT chk_person_svnr
+				   CHECK (
+						char_length(svnr::text) = 10 OR
+						char_length(svnr::text) = 16 OR
+						svnr IS NULL
+					)"
+		);
+
+		$this->endDown();
+    }
+}