Merge pull request #11969 from Bond-009/readconns

Create readonly DB connections when possible

Emby.Server.Implementations/Data/BaseSqliteRepository.cs

@@ -98,9 +98,9 @@ namespace Emby.Server.Implementations.Data
             }
         }
 
-        protected SqliteConnection GetConnection()
+        protected SqliteConnection GetConnection(bool readOnly = false)
         {
-            var connection = new SqliteConnection($"Filename={DbFilePath}");
+            var connection = new SqliteConnection($"Filename={DbFilePath}" + (readOnly ? ";Mode=ReadOnly" : string.Empty));
             connection.Open();
 
             if (CacheSize.HasValue)

Emby.Server.Implementations/Data/SqliteItemRepository.cs

@@ -1261,7 +1261,7 @@ namespace Emby.Server.Implementations.Data
 
             CheckDisposed();
 
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, _retrieveItemColumnsSelectQuery))
             {
                 statement.TryBind("@guid", id);
@@ -1887,7 +1887,7 @@ namespace Emby.Server.Implementations.Data
             CheckDisposed();
 
             var chapters = new List<ChapterInfo>();
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, "select StartPositionTicks,Name,ImagePath,ImageDateModified from " + ChaptersTableName + " where ItemId = @ItemId order by ChapterIndex asc"))
             {
                 statement.TryBind("@ItemId", item.Id);
@@ -1906,7 +1906,7 @@ namespace Emby.Server.Implementations.Data
         {
             CheckDisposed();
 
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, "select StartPositionTicks,Name,ImagePath,ImageDateModified from " + ChaptersTableName + " where ItemId = @ItemId and ChapterIndex=@ChapterIndex"))
             {
                 statement.TryBind("@ItemId", item.Id);
@@ -2469,7 +2469,7 @@ namespace Emby.Server.Implementations.Data
             var commandText = commandTextBuilder.ToString();
 
             using (new QueryTimeLogger(Logger, commandText))
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, commandText))
             {
                 if (EnableJoinUserData(query))
@@ -2537,7 +2537,7 @@ namespace Emby.Server.Implementations.Data
             var commandText = commandTextBuilder.ToString();
             var items = new List<BaseItem>();
             using (new QueryTimeLogger(Logger, commandText))
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, commandText))
             {
                 if (EnableJoinUserData(query))
@@ -2745,7 +2745,7 @@ namespace Emby.Server.Implementations.Data
 
             var list = new List<BaseItem>();
             var result = new QueryResult<BaseItem>();
-            using var connection = GetConnection();
+            using var connection = GetConnection(true);
             using var transaction = connection.BeginTransaction();
             if (!isReturningZeroItems)
             {
@@ -2927,7 +2927,7 @@ namespace Emby.Server.Implementations.Data
             var commandText = commandTextBuilder.ToString();
             var list = new List<Guid>();
             using (new QueryTimeLogger(Logger, commandText))
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, commandText))
             {
                 if (EnableJoinUserData(query))
@@ -4509,7 +4509,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             }
 
             var list = new List<string>();
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, commandText.ToString()))
             {
                 // Run this again to bind the params
@@ -4547,7 +4547,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             }
 
             var list = new List<PersonInfo>();
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, commandText.ToString()))
             {
                 // Run this again to bind the params
@@ -4787,7 +4787,7 @@ AND Type = @InternalPersonType)");
 
             var list = new List<string>();
             using (new QueryTimeLogger(Logger, commandText))
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, commandText))
             {
                 foreach (var row in statement.ExecuteQuery())
@@ -4987,8 +4987,8 @@ AND Type = @InternalPersonType)");
             var list = new List<(BaseItem, ItemCounts)>();
             var result = new QueryResult<(BaseItem, ItemCounts)>();
             using (new QueryTimeLogger(Logger, commandText))
-            using (var connection = GetConnection())
-            using (var transaction = connection.BeginTransaction(deferred: true))
+            using (var connection = GetConnection(true))
+            using (var transaction = connection.BeginTransaction())
             {
                 if (!isReturningZeroItems)
                 {
@@ -5335,7 +5335,7 @@ AND Type = @InternalPersonType)");
 
             cmdText += " order by StreamIndex ASC";
 
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             {
                 var list = new List<MediaStream>();
 
@@ -5722,7 +5722,7 @@ AND Type = @InternalPersonType)");
             cmdText += " order by AttachmentIndex ASC";
 
             var list = new List<MediaAttachment>();
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             using (var statement = PrepareStatement(connection, cmdText))
             {
                 statement.TryBind("@ItemId", query.ItemId);

Emby.Server.Implementations/Data/SqliteUserDataRepository.cs

@@ -267,7 +267,7 @@ namespace Emby.Server.Implementations.Data
 
             ArgumentException.ThrowIfNullOrEmpty(key);
 
-            using (var connection = GetConnection())
+            using (var connection = GetConnection(true))
             {
                 using (var statement = connection.PrepareStatement("select key,userid,rating,played,playCount,isFavorite,playbackPositionTicks,lastPlayedDate,AudioStreamIndex,SubtitleStreamIndex from UserDatas where key =@Key and userId=@UserId"))
                 {