SQL Managed Instance closing the gap on SQL Server ... Improvement. For SQL Server 2017. Please note that the following script will only work on the SQL Server 2019. SQL Server 2016 supported 4 versions (including itself) and SQL Server 2017 will support 5. If you're on SQL server 2019 Enterprise Edition, and you've got your database in compatibility level 150, you may heuristically receive Batch Mode without those tricks. Wanted a list of all the databases in the SQL Server instance with a readable compatibility level for each database. Change the database compatibility level to the native level for the new version of SQL Server. The compatibility levels of the tempdb, model, msdb, and resource databases are set to the current . It is quite possible that even though the compatibility level is the latest, it is possible that this feature is explicitly disabled. When you create new databases it will use whatever compatibility level your model database is set to - so unless you've changed that then for SQL Server 2019 it'll be 150. Summary. Table 1: SQL Server Versions and Native Compatibility Levels. CREATE TABLE TBLX A 2016 Express SQL Server (compatibility level should be 130) shows compatibility level 100. That new Cardinality Estimator is real hit or miss. Between SQL Server 7.0 and SQL Server 2012, there was no connection between the compatibility level of a database and the cardinality estimator that queries in that database would use. Microsoft SQL Server Internal Database Versions and Compatibility Levels A database created by a more recent version of Microsoft SQL Server cannot be attached or restored to an earlier version. Using a Stack Overflow demo database (any parallel query will do): . This is because there was just the one cardinality estimator, which received a major update in 1998. SQL Server 2008 and SQL Server 2008 R2 both are out of the Microsoft Extended Support. For example, the compatibility level designation is 150 for SQL Server 2019 and is compatible with 140, 130, 120, 110, and 100. So we figured this out - but i'm not sure if it is a bug or not, the default for Azure SQL compatibility is now 140 - oddly when setting our schema compatibility to 140 it still didn't work. The current default is 150 which corresponds to SQL Server 2019. Prior to SQL Server 2014 the database compatibility level of your user databases wasn't really something you had to think about much - at least not as far as performance is . The EventParser_systemname.log records the following errors: X #05988 EVNTPRSR source\server.cpp(1015): Processing <VirusDetectionEvent>, C:\PROGRA~2\McAfee\EPOLIC~1\DB\Events . We can use the same example as above, either create the same set of objects on a SQL Server 2019 database, or scrub the plan cache and up the compatibility level to 150: ALTER DATABASE SCOPED CONFIGURATION CLEAR PROCEDURE_CACHE ; GO ALTER DATABASE Whatever SET COMPATIBILITY_LEVEL = 150 ; GO Assume that you have a SQL Server 2017 installed. :-) Guys feel free to correct me in case I assumed wrong as I am not much into the database technologies. SQLPackage 18 and above has support for database compatibility level 150 (SQL Server 2019). 1 2 3 4 USE [master] GO ALTER DATABASE [SQLAuthority] SET COMPATIBILITY_LEVEL = 150 GO Database Compatibility Level 130 - I had the need to alter MSSQL Server 2019 compatibility level from 150 to 140 to support MBAM deployment, before switching to a different SQL version 2017 in my test environment. It can be enabled on SQL Server with undocumented trace flag 11042 at query, session, global, and start-up level. The worst part is that there's practically no gain to be realized for using higher compatibility . And if some query, may be due to regression are not performing poor you can use query hint QUERY_OPTIMIZER_COMPATIBILITY_LEVEL_n to 110 or 130. You may have it set lower. Keep in mind that Microsoft does not automatically update the compatibility level for existing Azure SQL databases, it is up to . 110: in SQL Server 2012 and Azure SQL Database. Check the Compatibility Level of the Database As part of the Database Compatibility Level setting, SQL Server earlier versions of SQL Server are backward compatible with Transact-SQL and query optimization behaviors only for the specified database, not the entire server as a whole. You can find more information on the following MS article: . SELECT [Server Name] = @@SERVERNAME, name as 'Database Name', compatibility_level as 'Compatibility Level', [SQL Server Version Compatibility] = CASE sys.databases.compatibility_level WHEN '160' THEN 'SQL Server 2020' WHEN '150 . Task manager shows that sql server service is consuming all available memory and all queries time out with an error that says There is insufficient system memory in resource pool internal to run this query Looking at the 140 (SQL Server 2017 Compatibility Level) Execution Plan we can dive into a XML just to find out the following picture: With last week's launch of SQL Server 2019, database compatibility level 150 moves out of public preview and into general availability status. According to the SQL Server version, the following T-SQL statement gives the compatibility level. I just called sp_recompile for all functions and it worked ok. Enable Query Store, and let it collect a baseline of your workload. Few days ago, I have very poor performance on a database that I migrate from SQL 2012 to SQL 2019. Upgrading to SQL Server 2017 maintains your existing user database's compatibility level until you explicitly decide to change it. Setting the Azure SQL database compatibility level to 130 and the SSDT project to the same, the deployment worked. I just can't select anything there or see what is the current Compatibility level of the database. Recently as part of an upgrade to SQL Server 2019, I needed to set the compatibility levels for a database to 150 (for 2019). 120: in SQL Server 2014 and Azure SQL Database. ALTER DATABASE database_name SET COMPATIBILITY _ LEVEL = { 150 | 140 | 130 | 120 | 110 | 100 | 90}. Tip: We can also change the database compatibility level on the SQL Server Management Studio (SSMS). For SQL Server 2019. When your database compatibility level is lower than 130, SQL Server can't find and run the OPENJSON() function. You could certainly do this by clicking through the configuration dialogs for each database as shown here, but for a server with many databases that could take some time. Msg 208, Level 16, State 1, Line 1 Invalid object name 'OPENJSON'. I faced this same problem when i moved from SQL Server 2014 to 2019. MEMCM officially only supports compatibility level 140 and lower, and recommends 140 for maximum performance (110 if you . The only option one should follow if they are using SQL Server 2008/R2, is to upgrade it to the latest version of the SQL Server. Configuration Manager database replication doesn't require the SQL Server replication feature. On the other side, when a new version of SQL Server is released, it brings an expanded feature set, a new engine version number, and a new compatibility level. SQL Server 2019 - 150 Starting with SQL Server 2016, additional versions are starting to be supported. For instance, SQL Server 2019 (version 15.x) has a compatibility level of 150, and we make use of the new features introduced in 2019 by setting our database compatibility level to 150. What Is Compatibility Mode In Sql? We can use the Query store as shown below. ALTER DATABASE database_name SET COMPATIBILITY _ LEVEL = { 150 | 140 | 130 | 120 | 110 | 100 | 90}. SQL Server 2019 is the latest version of SQL Server released at the Microsoft Ignite November 4-8, 2019 and PASS Summit November 5-8, 2019. The Cardinality Estimator version stays set to Legacy. For the engine to consider batch mode for a rowstore, the database compatibility level must be set to 150. For example, the new adaptive query processing feature family introduced in SQL Server 2017 requires compatibility level 140 or higher. ALTER DATABASE (Transact-SQL) Compatibility Level. The following compatibility level values can be configured (not all versions supports all of the above listed compatibility level): Product Supported Compatibility Level Values. Product Database Engine Version Default Compatibility Level Designation Supported Compatibility Level Values; SQL Server 2019 preview: 15: 150: 150, 140, 130, 120, 110, 100 OpenJSON or ISJSON(). Index Spool 190M rows. I am also an organiser of the Auckland SQL User Meetup Group. The database compatibility level is 120. The new, more accurate terminology that is relevant on SQL Server 2016 and newer is CE120 for compatibility level 120, CE130 for for compatibility level 130, CE140 for for compatibility level 140, and CE150 for for compatibility level 150. If we use the legacy cardinality operator by adding at hint the end of the select: Using compatibility level 150, and basically the new cardinality operator which was released in 2014, the query takes very long because of VERY wrong estimates, and thus a very bad plan. You can see the full plan here. SQL Server 2019 preview 150, 140, 130, 120, 110, 100 The current default is 150 which corresponds to SQL Server 2019. Only the Database Engine Services feature is required for each site server. For more information, see KB51111. The system used VSE 8.8 Patch 14 extensions: 8.8.0.732 and 1.2.0.452. Now one day when I opened up my SQL Server 2014 and went to the properties of the my database, I realized that the dropdown box for Compatibility level is empty. Lets execute the same Queries again in SQL server 2019. The developer Team asks me to upgrade the number of CPU and the Memory to have better performance. 60 = SQL Server 6.0 65 = SQL Server 6.5 VirusScan enterprise events do not parse with SQL Server 2019, and when the compatibility level is set to 150. I have been running it without any hiccups, for the past few months. It also appears that SQL 2019 will support 6, back to compatibility level 100. ALTER DATABASE [DatabaseName] SET COMPATIBILITY_LEVEL = 140 GO. This restriction is there because an older version cannot know about file format changes that were introduced in the newer release. For more information on SQL Server Compact Edition (CE) compatibility levels and how to set them, see ALTER DATABASE Compatibility Level (Transact-SQL). It allows the behaviour of the database to be compatible with the specific version of SQL Server it is running on. Check the compatibility level of the database you are running it from. First, I ask the Team to give me some queries sample to test the performance between the old environment in SQL server 2012 and the new one in SQL server 2019. Make sure you are on compatibility level 150 with SQL Server 2019 to use this feature. In on-prem SQL Server you can check the server version and multiply by 10 to get the maximum compatibility level supported by the server, or check the compatibility level of the model database to get the default compatibility level new databases will be created with. With the compatibility level set to 150, the database engine performs a few heuristic checks to make sure the query qualifies to use batch mode. You can however migrate it to a SQL Server 2008 R2 instance. If we change the compatibility level to 150, nothing works. Can one advise what I am missing . New databases created on a logical server with an older compatibility level for the master database will still use database Compatibility Level 140 if not explicitly designated. With this change in status, the default compatibility level for newdatabases created in Azure SQL Database is now 150. Very soon, we'll be changing the Azure SQL Database default compatibility level for newly created databases to 140. SharePoint Server Subscription Edition supports the following database versions: A Standard or Enterprise Edition of SQL Server for Windows that supports database compatibility level 150. A pretty fake one which brings nothing, besides proving that you can actually get a query with SESSION_CONTEXT function running in parallel, but only with the SQL Server 2019 compatibility level. Finally, click on the OK button. These compatibility levels reflect the version of SQL server. ALTER DATABASE AdventureWorks2017 SET COMPATIBILITY_LEVEL = 150. 1. To do the test, I use. ALTER DATABASE [DatabaseName] SET COMPATIBILITY_LEVEL = 150 GO Reason 2: Enable Adaptive Join. This means that if a feature is discontinued in compatibility level 150, it will still be available in compatibility level 140 and below. The intent is to minimize regression risk. The current recommended compatability level value is 110 for sites that have encountered SQL performance issues. SQL Server features. Database Compatibility Level: 150 Generally available on Windows , Linux , Docker , and Kubernetes . This restriction is there because an older version cannot know about file format changes that were introduced in the newer release. Upgrading to later service packs and versions of SQL Server will result in the compatibility level of the distribution database to be increased to match that of the master database. This is because there was just the one cardinality estimator, which received a major update in 1998. Syntax. We're moving an existing DB to a new SQL Server 2019 instance. This was done by conscious decision from Microsoft in an attempt to make for a smooth upgrade and ensure that existing applications can still function . This means that if a feature is discontinued in compatibility level 150, it will still be available in compatibility level 140 and below. and I have a new DB with compatibility level set to 150. As well I am active blogger and speaker at . One important difference between Batch Mode Tricks™ and Batch Mode On Rowstore ( BMOR) is that the latter allows you to read from row mode tables using Batch Mode, while . Output from sys.query_store_plan Compatibility Level 150. SQL Server 2000 (8.x) 8 This does mean that if you vetted a migration BEFORE May 2021, it would have worked on SQL 2014 but if you are going live AFTER May 2021 you will need to address the compatibility level before you proceed or use a hybrid approach to get the data over to BC for Go Live. In my case, the database I was trying to run this on had a compatibility level of 120. At the same time, Azure SQL Database gets the new default compatibility level equal to that of the SQL Server. There's a big honking blue box in the documentation concerning this topic. Consider the following scenario: You run a spatial query by using a filter with a function such as STIntersects in SQL Server 2016 or in SQL Server 2017 on Windows. Syntax. The alignment of SQL versions to default compatibility levels are as follows: 100: in SQL Server 2008 and Azure SQL Database. It would be best to verify your SQL queries and their syntax for the supported compatibility levels. I am using SQL server 2008 R2 with WSUS 3.0 SP2. Table 1: SQL Server Versions and Native Compatibility Levels. Upgrade to the latest SQL Server version and keep the source (legacy) database compatibility level. Copy and paste the following example into the query window and select Execute. This improvement introduces a new USE HINT 'QUERY_OPTIMIZER_COMPATIBILITY_LEVEL_n' to force the query optimizer behavior at a query level, as if the query was compiled with database compatibility level n, where n is a supported database compatibility level from the following list: 100, 110, 120, 130, or 140. The Query store can always be helpful for any database level changes, SQL Server restart, database upgrade, index changes etc. Between SQL Server 7.0 and SQL Server 2012, there was no connection between the compatibility level of a database and the cardinality estimator that queries in that database would use. For example, if we restore a SQL Server 2005 database backup to SQL Server 2017, then the compatibility level of the restored database would be set to 100 because that is the minimum SQL 2017 level supported. You also get all of the other performance related changes from 130 and 140, plus new ones as detailed here . It requires SQL Server Compatibility level to 150 . Here is the script which you can execute if you want to change your compatibility of the database to the latest version of SQL Server 2019. Erik Darling explains the upsides and downsides of moving to SQL Server 2019 and compatibility level 150: In those versions, flipping compatibility level uses the new Cardinality Estimator (CE). That query proved that the compatibility level of the MEMCM database was configured to 150, which is the default when creating a new database on an updated SQL Server 2017. Suppose we want to upgrade 'WideWorldImporters' database from SQL Server 2017(Compatibility level 140) to SQL Server 2019 (Compatibility level 150). I use SSMS version 18.5 yet I still cannot execute anything related to JSON, e.g. Use Query Store (and Automatic Plan Correction on SQL Server 2017 Enterprise . Without making any changes to the Query Store configuration, change the compatibility level to 150. However, each version of SQL Server supports up to a specific compatibility level. Now we change the Adventureworks compatibility level to SQL Server 2019 and observe the effection of this feature on the execution plan. Otherwise, you need to depend on Trace flag 460. ALTER DATABASE PracticeDB SET COMPATIBILITY_LEVEL = 150; --SQL Server 2019 GO DROP TABLE IF EXISTS dbo.Players; . This was the first time for me so I was bit confused and I tried to search online. In SQL Server Management Studio (SSMS), right-click on the database name, select Properties, select the Options node, click on the drop-down next to Compatibility level and select the level that matches your SQL Server. Changing the compatibility level incorrectly can indeed have an impact in the functionality of the application as well as in the performance since MSSQL engine will work differently for each level. Ideally it should be be 150 which is SQL Server 2019 compatibility level. This includes SQL Server 2019 Cumulative Update 5 (CU5) or later and any future version of SQL Server for Windows that supports database compatibility level . Compatibility levels after an upgrade. Example. ALTER DATABASE AdventureWorks2019 SET COMPATIBILITY_LEVEL = 150; GO Next steps For example if you have a SQL Server 2000 database you cannot migrate it to a SQL Server 2012 or 2014 instance because there is not backwards compatibility support for such an old version of SQL Server. ALTER DATABASE database_name SET COMPATIBILITY_LEVEL = 150. If the Remedy database is "migrated" to a higher compatibility level, this needs to be addressed to Microsoft. "SQL Server 2014 includes substantial improvements to the component that creates and optimized query plans." But` I haven't been benefiting from that at all for the past 3 years because my compatibility_level is still at 100. 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