From 7ddf183da4854a4c9f56906b0cdc64badf97660f Mon Sep 17 00:00:00 2001
From: Sean Dague
Date: Wed, 28 May 2008 15:02:04 +0000
Subject: remove terrain bloat, only keep last terrain revision for mysql.  For
 active terraformers this should return a lot of database space.

---
 OpenSim/Data/MySQL/MySQLDataStore.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/OpenSim/Data/MySQL/MySQLDataStore.cs b/OpenSim/Data/MySQL/MySQLDataStore.cs
index 7ee625d..9a44fbd 100644
--- a/OpenSim/Data/MySQL/MySQLDataStore.cs
+++ b/OpenSim/Data/MySQL/MySQLDataStore.cs
@@ -442,15 +442,19 @@ namespace OpenSim.Data.MySQL
 
         public void StoreTerrain(double[,] ter, LLUUID regionID)
         {
-            int revision = Util.UnixTimeSinceEpoch();
+            int revision = 1;
             m_log.Info("[REGION DB]: Storing terrain revision r" + revision.ToString());
 
             lock (m_dataSet)
             {
+                MySqlCommand delete = new MySqlCommand("delete from terrain where RegionUUID=?RegionUUID", m_connection);
                 MySqlCommand cmd = new MySqlCommand("insert into terrain(RegionUUID, Revision, Heightfield)" +
                                                     " values(?RegionUUID, ?Revision, ?Heightfield)", m_connection);
                 using (cmd)
                 {
+                    delete.Parameters.Add(new MySqlParameter("?RegionUUID", Util.ToRawUuidString(regionID)));
+                    delete.ExecuteNonQuery();
+                    
                     cmd.Parameters.Add(new MySqlParameter("?RegionUUID", Util.ToRawUuidString(regionID)));
                     cmd.Parameters.Add(new MySqlParameter("?Revision", revision));
                     cmd.Parameters.Add(new MySqlParameter("?Heightfield", serializeTerrain(ter)));
-- 
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