Slight optimization in pageouter (we know some totals (e.g. for posts in thread and threads in board), so there is no need in querying these from DB)

Builder/IISMainHandler/build.txt

@@ -1 +1 @@
-1972
+1973

FLocal.Common/dataobjects/Board.cs

@@ -323,6 +323,7 @@ namespace FLocal.Common.dataobjects {
 		}
 
 		public IEnumerable<Thread> getThreads(Diapasone diapasone, SortSpec[] sortBy) {
+			diapasone.total = this.totalThreads;
 			return Thread.LoadByIds(
 				from stringId in Config.instance.mainConnection.LoadIdsByConditions(
 					Thread.TableSpec.instance,
@@ -339,6 +340,7 @@ namespace FLocal.Common.dataobjects {
 		}
 
 		public IEnumerable<Thread> getThreads(Diapasone diapasone, bool isAscending) {
+			diapasone.total = this.totalThreads;
 			return this.getThreads(
 				diapasone,
 				new SortSpec[] {

FLocal.Common/dataobjects/PMConversation.cs

@@ -157,6 +157,7 @@ namespace FLocal.Common.dataobjects {
 		}
 
 		public IEnumerable<PMMessage> getMessages(Diapasone diapasone, UserContext context, bool isAscending) {
+			diapasone.total = this.totalMessages;
 			return PMMessage.LoadByIds(
 				from stringId in Config.instance.mainConnection.LoadIdsByConditions(
 					PMMessage.TableSpec.instance,

FLocal.Common/dataobjects/Thread.cs

@@ -237,6 +237,7 @@ namespace FLocal.Common.dataobjects {
 		}
 
 		public IEnumerable<Post> getPosts(Diapasone diapasone, bool isAscending) {
+			diapasone.total = this.totalPosts;
 			return Post.LoadByIds(
 				from stringId in Config.instance.mainConnection.LoadIdsByConditions(
 					Post.TableSpec.instance,

FLocal.IISHandler/PageOuter.cs

@@ -74,12 +74,12 @@ namespace FLocal.IISHandler {
 				new XElement("unlimited", (this.count < 1).ToPlainString()),
 				new XElement("start", this.start),
 				new XElement("count", this.count),
-				new XElement("total", this.total),
+				new XElement("total", this.total.Value),
 				new XElement("perPage", this.perPage),
-				new XElement("isEmpty", (this.perPage >= this.total).ToPlainString())
+				new XElement("isEmpty", (this.perPage >= this.total.Value).ToPlainString())
 			);
 			if(this.count > 0) {
-				if(this.start + this.count < this.total) {
+				if(this.start + this.count < this.total.Value) {
 					result.Add(new XElement("next", this.start + this.count));
 				}
 			}
@@ -88,7 +88,7 @@ namespace FLocal.IISHandler {
 				pages.Add(i*this.perPage);
 			}
 			{
-				long last = this.total - 1;
+				long last = this.total.Value - 1;
 				long totalFloor = last - (last % this.perPage);
 				for(long i=0; i<left; i++) {
 					pages.Add(totalFloor - i*this.perPage);
@@ -102,7 +102,7 @@ namespace FLocal.IISHandler {
 			}
 			pages.Add(this.start);
 			result.Add(new XElement("pages",
-				from page in pages where (page >= 0) && (page < this.total) orderby page select new XElement("page", page)
+				from page in pages where (page >= 0) && (page < this.total.Value) orderby page select new XElement("page", page)
 			));
 			return result;
 		}

MySQLConnector/Connection.cs

@@ -138,27 +138,33 @@ namespace MySQLConnector {
 					command.AddParameter(kvp.Key, kvp.Value);
 				}
 
-				command.CommandText = logger.commandText = "SELECT COUNT(*) " + queryMain;
-				object rawCount;
-				//try {
-				rawCount = command.ExecuteScalar();
-				//} catch(Npgsql.NpgsqlException e) {
-				//throw new FLocalException("Error while trying to execute " + command.CommandText + ": " + e.Message);
-				//}
-				long count = (long)rawCount;
-				if(count < 1) {
-					diapasone.total = 0;
+				if(!diapasone.total.HasValue) {
+					command.CommandText = logger.commandText = "SELECT COUNT(*) " + queryMain;
+					object rawCount;
+					//try {
+					rawCount = command.ExecuteScalar();
+					//} catch(Npgsql.NpgsqlException e) {
+					//throw new FLocalException("Error while trying to execute " + command.CommandText + ": " + e.Message);
+					//}
+					long count = (long)rawCount;
+					if(count < 1) {
+						diapasone.total = 0;
+					} else {
+						diapasone.total = count;
+					}
+				}
+
+				if(diapasone.total.Value < 1) {
 					return new List<string>();
 				} else {
-					diapasone.total = count;
-					if(diapasone.total > 1000 && diapasone.count < 0 && !allowHugeLists) {
+					if(diapasone.total.Value > 1000 && diapasone.count < 0 && !allowHugeLists) {
 						throw new CriticalException("huge list");
 					}
 					string queryLimits = "";
 					if(diapasone.count >= 0) {
 						queryLimits = "LIMIT " + diapasone.count + " OFFSET " + diapasone.start;
 					}
-					command.CommandText = "SELECT " + table.getIdSpec().compile(this.traits) + " " + queryMain + " " + querySorts + " " + queryLimits;
+					command.CommandText = logger.commandText = "SELECT " + table.getIdSpec().compile(this.traits) + " " + queryMain + " " + querySorts + " " + queryLimits;
 
 					List<string> result = new List<string>();
 					using(DbDataReader reader = command.ExecuteReader()) {

Web.Core/DB/Diapasone.cs

@@ -8,7 +8,11 @@ namespace Web.Core.DB {
 
 		public readonly long start;
 		public readonly long count;
-		public long total {
+
+		/// <summary>
+		/// Diapasone total value of null means that it has not yet been computed
+		/// </summary>
+		public long? total {
 			get;
 			set;
 		}
@@ -16,6 +20,7 @@ namespace Web.Core.DB {
 		public Diapasone(long start, long count) {
 			this.start = start;
 			this.count = count;
+			this.total = null;
 		}
 
 		public static Diapasone unlimited {