From c5d6f31055323690fa1b6e29c362cd66fd765640 Mon Sep 17 00:00:00 2001
From: Christian Schneider
Date: Wed, 17 Dec 2008 15:32:46 +0000
Subject: Purge cache shared by multiple apaches on SQL schema change

---
 it_dbi.class | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/it_dbi.class b/it_dbi.class
index df79f0e..4e033b4 100644
--- a/it_dbi.class
+++ b/it_dbi.class
@@ -438,6 +438,12 @@ function query($query, $p = array())
 		if (!$result)
 			$this->_fatal("query(\"$query\") failed");
 	}
+	else if (preg_match('/^(CREATE|ALTER|DROP) /i', $query))
+	{
+		# Purge cache for schema changes (after modifying table)
+		$dbid = "{$p['user']}@{$p['server']}:{$p['db']}";
+		it_dbi::_state_purgeshared($dbid);
+	}
 
 
 	if ($GLOBALS['debug_sqllog'])
@@ -728,6 +734,12 @@ function _state_put($dbid, $state)
 	it_cache::put("dbi:$dbid", array('link' => null) + (array)$state);	# link is not transferable
 }
 
+function _state_purgeshared($dbid)
+{
+	#var_dump("purgeshared", $dbid);
+	it_cache::put("dbi:$dbid", array());	# Nuke shared cache
+}
+
 #
 # Implement PHP 5 Iterator interface to make foreach work
 # Example: foreach (new T_User('firstname' => "foo") as $foouser) { ... }
-- 
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