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Does SQL Sever support inmemory database?

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0

I have basically a testing scenario, where I

1. Create database


2. Fill it with some data


3. Execute the business logic to be tested, which modifies the data. I don't own the business logic implementation, not the DB schema. I must test what is already there.


4. Assert the data are changed as expected


5. Delete the database

Does SQL Server support something like that in memory only, so that I can seed it up? Obviously I don't need persistence

sql-server integration-testing in-memory-database database-testing

share|improve this question

edited Mar 8 at 9:07

jarlh

29.8k52138

asked Mar 8 at 8:21

LieroLiero

9,807745116

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't know if SQL Server has an in-memory only version. But, you may look into using a cache layer on top of SQL Server. Or, for a pure in memory database, read about things like H2.
  
  – Tim Biegeleisen
  Mar 8 at 8:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  H2 does not help, because I don't own the existing implementation of the business logic
  
  – Liero
  Mar 8 at 8:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That's the wrong question. SQL Server has in-memory tables since SQL Server 2014. All versions have temporary tables and table variables. All of those things would cover the bullet points. None of these are relevant for testing though (except perhaps for temporary tables)
  
  – Panagiotis Kanavos
  Mar 8 at 8:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PanagiotisKanavos I recant my earlier comment, but for integration testing, an actual SQL Server instance is precisely against what the OP should be running those tests. For unit testing, the database can be mocked.
  
  – Tim Biegeleisen
  Mar 8 at 8:31
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Liero another possibility would be to create the test database, detach it and use the files as a template. Each time you want a new test database, copy them to a new location followed by an ATTACH DATABASE. This will be faster than RESTORE because it won't have a recovery phase
  
  – Panagiotis Kanavos
  Mar 8 at 8:46
  

  
  
  
  

 | 
show 14 more comments

0

I have basically a testing scenario, where I

1. Create database


2. Fill it with some data


3. Execute the business logic to be tested, which modifies the data. I don't own the business logic implementation, not the DB schema. I must test what is already there.


4. Assert the data are changed as expected


5. Delete the database

Does SQL Server support something like that in memory only, so that I can seed it up? Obviously I don't need persistence

sql-server integration-testing in-memory-database database-testing

share|improve this question

edited Mar 8 at 9:07

jarlh

29.8k52138

asked Mar 8 at 8:21

LieroLiero

9,807745116

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't know if SQL Server has an in-memory only version. But, you may look into using a cache layer on top of SQL Server. Or, for a pure in memory database, read about things like H2.
  
  – Tim Biegeleisen
  Mar 8 at 8:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  H2 does not help, because I don't own the existing implementation of the business logic
  
  – Liero
  Mar 8 at 8:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That's the wrong question. SQL Server has in-memory tables since SQL Server 2014. All versions have temporary tables and table variables. All of those things would cover the bullet points. None of these are relevant for testing though (except perhaps for temporary tables)
  
  – Panagiotis Kanavos
  Mar 8 at 8:28
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PanagiotisKanavos I recant my earlier comment, but for integration testing, an actual SQL Server instance is precisely against what the OP should be running those tests. For unit testing, the database can be mocked.
  
  – Tim Biegeleisen
  Mar 8 at 8:31
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Liero another possibility would be to create the test database, detach it and use the files as a template. Each time you want a new test database, copy them to a new location followed by an ATTACH DATABASE. This will be faster than RESTORE because it won't have a recovery phase
  
  – Panagiotis Kanavos
  Mar 8 at 8:46
  

  
  
  
  

 | 
show 14 more comments

I have basically a testing scenario, where I

1. Create database


2. Fill it with some data


3. Execute the business logic to be tested, which modifies the data. I don't own the business logic implementation, not the DB schema. I must test what is already there.


4. Assert the data are changed as expected


5. Delete the database

Does SQL Server support something like that in memory only, so that I can seed it up? Obviously I don't need persistence

sql-server integration-testing in-memory-database database-testing

share|improve this question

edited Mar 8 at 9:07

jarlh

29.8k52138

asked Mar 8 at 8:21

LieroLiero

9,807745116

sql-server integration-testing in-memory-database database-testing

sql-server integration-testing in-memory-database database-testing

share|improve this question

edited Mar 8 at 9:07

jarlh

29.8k52138

asked Mar 8 at 8:21

LieroLiero

9,807745116

share|improve this question

edited Mar 8 at 9:07

jarlh

29.8k52138

asked Mar 8 at 8:21

LieroLiero

9,807745116

edited Mar 8 at 9:07

jarlh

29.8k52138

edited Mar 8 at 9:07

jarlh

29.8k52138

asked Mar 8 at 8:21

LieroLiero

9,807745116

asked Mar 8 at 8:21

LieroLiero

9,807745116

1 Answer
1

active

oldest

votes

1

SQL Server has in-memory OLTP. This feature is quite close to what you are looking into. Starting SQL Server 2016 SP1 it is possible in all editions, including sql express.

Obviously I don't need persistence

The option DURABILITY=SCHEMA_ONLY preserves only the metadata. Such a scenario can be optimal for staging tables because it results in a lock/latch/log free way of data load. Obviously, the table will not survive instance/service restart.

CREATE DATABASE [Test]
GO 
-- Memory Optimized FG
ALTER DATABASE [Test] ADD FILEGROUP [MemoryOptimizedFG] CONTAINS MEMORY_OPTIMIZED_DATA 
ALTER DATABASE [Test] ADD FILE (name='Test1', filename='D:SQLDataTestInMemory') TO FILEGROUP [MemoryOptimizedFG]
GO

CREATE TABLE dbo.[TestTable] (
 ID int NOT NULL IDENTITY (1, 1) PRIMARY KEY NONCLUSTERED,
 ColumnID int NOT NULL,
 Description varchar(100) NOT NULL,
 dateAndTime datetime NOT NULL
) WITH (MEMORY_OPTIMIZED=ON, DURABILITY=SCHEMA_ONLY) 
GO

References:

• https://www.red-gate.com/simple-talk/sql/database-administration/in-memory-oltp-understanding-memory-optimized-tables/


• https://docs.microsoft.com/en-us/sql/relational-databases/in-memory-oltp/in-memory-oltp-in-memory-optimization?view=sql-server-2017

share|improve this answer

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is almost what I'm looking for, but It doesn't help me with cleaning data after the test is finished, so I need to delete and recreate the DB anyway
  
  – Liero
  Mar 8 at 8:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Liero, for deletion and recreation you have steps 1 and 5 in your original testing scenario ;)
  
  – Alexander Volok
  Mar 8 at 8:47
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Liero what's the problem with that? What are you trying to avoid? DROP & CREATE don't take that long. Why would you need a transient database for this?
  
  – Panagiotis Kanavos
  Mar 8 at 8:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perhaps, you will want to keep an empty database, but delete/recreate in-memory objects in it
  
  – Alexander Volok
  Mar 8 at 8:48
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PanagiotisKanavos: Not really a problem, but if there was real inmemory db, it would make it much simpler and faster (there is a lot of tests) Since there isn't I will go with these approach probably. However, the DB scripts are given and I don't want to modify them. Let me check if I can ALTER TABLE WITH MEMORY_OPTIMIZED=ON
  
  – Liero
  Mar 8 at 8:59
  

  
  
  
  

add a comment | 

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1

SQL Server has in-memory OLTP. This feature is quite close to what you are looking into. Starting SQL Server 2016 SP1 it is possible in all editions, including sql express.

Obviously I don't need persistence

The option DURABILITY=SCHEMA_ONLY preserves only the metadata. Such a scenario can be optimal for staging tables because it results in a lock/latch/log free way of data load. Obviously, the table will not survive instance/service restart.

CREATE DATABASE [Test]
GO 
-- Memory Optimized FG
ALTER DATABASE [Test] ADD FILEGROUP [MemoryOptimizedFG] CONTAINS MEMORY_OPTIMIZED_DATA 
ALTER DATABASE [Test] ADD FILE (name='Test1', filename='D:SQLDataTestInMemory') TO FILEGROUP [MemoryOptimizedFG]
GO

CREATE TABLE dbo.[TestTable] (
 ID int NOT NULL IDENTITY (1, 1) PRIMARY KEY NONCLUSTERED,
 ColumnID int NOT NULL,
 Description varchar(100) NOT NULL,
 dateAndTime datetime NOT NULL
) WITH (MEMORY_OPTIMIZED=ON, DURABILITY=SCHEMA_ONLY) 
GO

References:

• https://www.red-gate.com/simple-talk/sql/database-administration/in-memory-oltp-understanding-memory-optimized-tables/


• https://docs.microsoft.com/en-us/sql/relational-databases/in-memory-oltp/in-memory-oltp-in-memory-optimization?view=sql-server-2017

share|improve this answer

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is almost what I'm looking for, but It doesn't help me with cleaning data after the test is finished, so I need to delete and recreate the DB anyway
  
  – Liero
  Mar 8 at 8:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Liero, for deletion and recreation you have steps 1 and 5 in your original testing scenario ;)
  
  – Alexander Volok
  Mar 8 at 8:47
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Liero what's the problem with that? What are you trying to avoid? DROP & CREATE don't take that long. Why would you need a transient database for this?
  
  – Panagiotis Kanavos
  Mar 8 at 8:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perhaps, you will want to keep an empty database, but delete/recreate in-memory objects in it
  
  – Alexander Volok
  Mar 8 at 8:48
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PanagiotisKanavos: Not really a problem, but if there was real inmemory db, it would make it much simpler and faster (there is a lot of tests) Since there isn't I will go with these approach probably. However, the DB scripts are given and I don't want to modify them. Let me check if I can ALTER TABLE WITH MEMORY_OPTIMIZED=ON
  
  – Liero
  Mar 8 at 8:59
  

  
  
  
  

add a comment | 

1

SQL Server has in-memory OLTP. This feature is quite close to what you are looking into. Starting SQL Server 2016 SP1 it is possible in all editions, including sql express.

Obviously I don't need persistence

The option DURABILITY=SCHEMA_ONLY preserves only the metadata. Such a scenario can be optimal for staging tables because it results in a lock/latch/log free way of data load. Obviously, the table will not survive instance/service restart.

CREATE DATABASE [Test]
GO 
-- Memory Optimized FG
ALTER DATABASE [Test] ADD FILEGROUP [MemoryOptimizedFG] CONTAINS MEMORY_OPTIMIZED_DATA 
ALTER DATABASE [Test] ADD FILE (name='Test1', filename='D:SQLDataTestInMemory') TO FILEGROUP [MemoryOptimizedFG]
GO

CREATE TABLE dbo.[TestTable] (
 ID int NOT NULL IDENTITY (1, 1) PRIMARY KEY NONCLUSTERED,
 ColumnID int NOT NULL,
 Description varchar(100) NOT NULL,
 dateAndTime datetime NOT NULL
) WITH (MEMORY_OPTIMIZED=ON, DURABILITY=SCHEMA_ONLY) 
GO

References:

• https://www.red-gate.com/simple-talk/sql/database-administration/in-memory-oltp-understanding-memory-optimized-tables/


• https://docs.microsoft.com/en-us/sql/relational-databases/in-memory-oltp/in-memory-oltp-in-memory-optimization?view=sql-server-2017

share|improve this answer

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  This is almost what I'm looking for, but It doesn't help me with cleaning data after the test is finished, so I need to delete and recreate the DB anyway
  
  – Liero
  Mar 8 at 8:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Liero, for deletion and recreation you have steps 1 and 5 in your original testing scenario ;)
  
  – Alexander Volok
  Mar 8 at 8:47
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Liero what's the problem with that? What are you trying to avoid? DROP & CREATE don't take that long. Why would you need a transient database for this?
  
  – Panagiotis Kanavos
  Mar 8 at 8:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Perhaps, you will want to keep an empty database, but delete/recreate in-memory objects in it
  
  – Alexander Volok
  Mar 8 at 8:48
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PanagiotisKanavos: Not really a problem, but if there was real inmemory db, it would make it much simpler and faster (there is a lot of tests) Since there isn't I will go with these approach probably. However, the DB scripts are given and I don't want to modify them. Let me check if I can ALTER TABLE WITH MEMORY_OPTIMIZED=ON
  
  – Liero
  Mar 8 at 8:59
  

  
  
  
  

add a comment | 

SQL Server has in-memory OLTP. This feature is quite close to what you are looking into. Starting SQL Server 2016 SP1 it is possible in all editions, including sql express.

Obviously I don't need persistence

The option DURABILITY=SCHEMA_ONLY preserves only the metadata. Such a scenario can be optimal for staging tables because it results in a lock/latch/log free way of data load. Obviously, the table will not survive instance/service restart.

CREATE DATABASE [Test]
GO 
-- Memory Optimized FG
ALTER DATABASE [Test] ADD FILEGROUP [MemoryOptimizedFG] CONTAINS MEMORY_OPTIMIZED_DATA 
ALTER DATABASE [Test] ADD FILE (name='Test1', filename='D:SQLDataTestInMemory') TO FILEGROUP [MemoryOptimizedFG]
GO

CREATE TABLE dbo.[TestTable] (
 ID int NOT NULL IDENTITY (1, 1) PRIMARY KEY NONCLUSTERED,
 ColumnID int NOT NULL,
 Description varchar(100) NOT NULL,
 dateAndTime datetime NOT NULL
) WITH (MEMORY_OPTIMIZED=ON, DURABILITY=SCHEMA_ONLY) 
GO

References:

• https://www.red-gate.com/simple-talk/sql/database-administration/in-memory-oltp-understanding-memory-optimized-tables/


• https://docs.microsoft.com/en-us/sql/relational-databases/in-memory-oltp/in-memory-oltp-in-memory-optimization?view=sql-server-2017

share|improve this answer

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925

CREATE DATABASE [Test]
GO 
-- Memory Optimized FG
ALTER DATABASE [Test] ADD FILEGROUP [MemoryOptimizedFG] CONTAINS MEMORY_OPTIMIZED_DATA 
ALTER DATABASE [Test] ADD FILE (name='Test1', filename='D:SQLDataTestInMemory') TO FILEGROUP [MemoryOptimizedFG]
GO

CREATE TABLE dbo.[TestTable] (
 ID int NOT NULL IDENTITY (1, 1) PRIMARY KEY NONCLUSTERED,
 ColumnID int NOT NULL,
 Description varchar(100) NOT NULL,
 dateAndTime datetime NOT NULL
) WITH (MEMORY_OPTIMIZED=ON, DURABILITY=SCHEMA_ONLY) 
GO

share|improve this answer

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925

answered Mar 8 at 8:40

Alexander VolokAlexander Volok

3,492925