added database versioning

2013-04-22 20:21:06 +02:00
parent da12a3e4a7
commit a6547619e3
4 changed files with 122 additions and 8 deletions
--- a/bin/dbsv-update.php
+++ b/bin/dbsv-update.php
@@ -0,0 +1,107 @@
+<?php
+/***************************************************************************
+ *  For license information see doc/license.txt
+ *
+  *  Unicode Reminder メモ
+***************************************************************************/
+
+	/*
+	 * Database Structure Versioning
+	 */
+
+	if (!isset($opt['rootpath']))
+		$opt['rootpath'] = '../htdocs/';
+	require_once($opt['rootpath'] . 'lib2/cli.inc.php');
+
+	if (!field_exists('cache_attrib','gc_id'))
+		die("\n
+	       ERROR: Database structure too old. You must first do a manual update to commit 467aae4
+				 (March 27, 2013) to enable automatic updates. See htdocs/doc/sql/db-changes.txt.\n");
+
+	$db_version = max(99, sql_value("SELECT `value` FROM `sysconfig` WHERE `name`='db_version'",99));
+
+	do
+	{
+		++$db_version;
+		$dbv_function = 'dbv_'.$db_version;
+		if (function_exists($dbv_function))
+		{
+			echo "applying DB mutation #".$db_version;
+			call_user_func($dbv_function);
+			sql("INSERT INTO `sysconfig` (`name`,`value`) VALUES ('db_version','&1')
+			     ON DUPLICATE KEY UPDATE `value`='&1'",
+			    $db_version);
+			echo " - ok.\n";
+		}
+		else
+			$db_version = -1;
+	} while ($db_version > 0);
+
+
+  // Test if a certain database field exists
+	function field_exists($table, $field)
+	{
+		global $opt;
+
+		return sql_value("SELECT COUNT(*)
+		                    FROM `information_schema`.`columns`
+		                   WHERE `table_schema`='&1' AND `table_name`='&2' AND `column_name`='&3'",
+										 0, $opt['db']['placeholder']['db'], $table, $field) > 0;
+	}
+
+	// get type of a database field
+	function field_type($table, $field)
+	{
+		global $opt;
+
+		return strtoupper(
+						sql_value("SELECT `data_type`
+		                    FROM `information_schema`.`columns`
+		                   WHERE `table_schema`='&1' AND `table_name`='&2' AND `column_name`='&3'",
+										 '', $opt['db']['placeholder']['db'], $table, $field) );
+	}
+
+
+	// Database mutations
+	// - must be consecutively numbered
+	// - should behave well if run multiple times
+
+	function dbv_100()  // expands log date to datetime, to enable time logging
+	{
+		if (field_type('cache_logs','date') != 'DATETIME')
+			sql("ALTER TABLE `cache_logs` CHANGE COLUMN `date` `date` DATETIME NOT NULL");
+		if (field_type('cache_logs_archived','date') != 'DATETIME')
+			sql("ALTER TABLE `cache_logs_archived` CHANGE COLUMN `date` `date` DATETIME NOT NULL");
+	}
+
+	function dbv_101()  // add fields for fixing OKAPI issue #232
+	{
+		if (!field_exists('caches','meta_last_modified'))
+		{
+		  // initialize with '0000-00-00 00:00:00' for existing data, that's ok
+			sql("ALTER TABLE `caches` ADD COLUMN `meta_last_modified` DATETIME NOT NULL COMMENT 'via Trigger (cache_logs)' AFTER `listing_last_modified`");
+		}
+		if (!field_exists('cache_logs','log_last_modified'))
+		{
+			if (field_exists('cache_logs','okapi_syncbase'))
+				$after = 'okapi_syncbase';
+			else
+				$after = 'last_modified';
+			sql("ALTER TABLE `cache_logs` ADD COLUMN `log_last_modified` DATETIME NOT NULL COMMENT 'via Trigger (stat_caches, gk_item_waypoint)' AFTER `".$after."`");
+			sql("UPDATE `cache_logs` SET `log_last_modified` = GREATEST(
+			         `last_modified`,
+			         IFNULL((SELECT MAX(`last_modified`) FROM `pictures` WHERE `pictures`.`object_type`=1 AND `pictures`.`object_id` = `cache_logs`.`id`),'0')
+			         )");
+		}
+		if (!field_exists('cache_logs_archived','log_last_modified'))
+		{
+			if (field_exists('cache_logs_archived','okapi_syncbase'))
+				$after = 'okapi_syncbase';
+			else
+				$after = 'last_modified';
+			sql("ALTER TABLE `cache_logs_archived` ADD COLUMN `log_last_modified` DATETIME NOT NULL AFTER `".$after."`");
+			sql("UPDATE `cache_logs_archived` SET `log_last_modified` = `last_modified`");
+		}
+	}
+
+?>