Remote access is not supported for transaction isolation level "SNAPSHOT". The Stored Proc in question has a Transaction built into it (and yes we use Snapshot Transactions) and it calls 10 other procs. If everything works, the transactions is committed.
Full Answer
Why is remote access not supported in SQL Server snapshot isolation?
If you dig into the internals of how snapshot isolation is implemented in SQL Server, the reason why remote access is not supported becomes clear. When snapshot isolation is enabled, up to 14 bytes of versioning information are appended to each row that is modified.
Why do I receive this error when using a snapshot isolation?
When a snapshot isolation transaction accesses object metadata that has been modified in another concurrent transaction, it may receive this error:
What is the default transaction isolation level for Azure SQL snapshots?
In Azure SQL, snapshot isolation is enabled and the default transaction isolation level is READ COMMITTED SNAPSHOT. To check the default values, you can run the following T-SQL:
How many bytes of versioning information does snapshot isolation add?
When snapshot isolation is enabled, up to 14 bytes of versioning information are appended to each row that is modified. The additional bytes contain the transaction sequence number of the transaction that modified the row, along with a pointer to the versioned row in tempdb.
How do I enable snapshot isolation?
You need to enable snapshot isolation by setting the ALLOW_SNAPSHOT_ISOLATION database option in order to use it. The READ_COMMITTED_SNAPSHOT database option determines the behavior of the default READ COMMITTED isolation level when snapshot isolation is enabled in a database.
How do I change the transaction isolation level?
To set the transaction isolation level, use an ISOLATION LEVEL level clause. It is not permitted to specify multiple ISOLATION LEVEL clauses in the same SET TRANSACTION statement. The default isolation level is REPEATABLE READ . Other permitted values are READ COMMITTED , READ UNCOMMITTED , and SERIALIZABLE .
What are the four transaction isolation levels?
four transaction isolation levels in SQL Server 7.0: Uncommitted Read (also called "dirty read"), Committed Read, Repeatable Read, and Serializable.
What is isolation level in transaction management?
The transaction isolation level is a state within databases that specifies the amount of data that is visible to a statement in a transaction, specifically when the same data source is accessed by multiple transactions simultaneously.
What is snapshot isolation level in SQL Server?
Snapshot isolation avoids most locking and blocking by using row versioning. When data is modified, the committed versions of affected rows are copied to tempdb and given version numbers. This operation is called copy on write and is used for all inserts, updates and deletes using this technique.
How do I change the transaction isolation level in SQL Server?
How do I do this? From the tools menu select options. Under Query Execution/SQL Server/Advanced, change the value of SET TRANSACTION ISOLATION LEVEL to READ UNCOMMITTED.
Does MySQL use snapshot isolation?
There's no snapshot isolation level in MySQL. It uses snapshot for Consistent Nonlocking Reads, but it doesn't mean it supports snapshot isolation. According to the Wikipedia page, only databases below support snapshot isolation. But the REPEATABLE READ level doesn't do this at all, though it uses snapshot.
What is transaction isolation and why it is important?
Transaction isolation is an important part of any transactional system. It deals with consistency and completeness of data retrieved by queries unaffecting a user data by other user actions. A database acquires locks on data to maintain a high level of isolation.
How do you ensure isolation in a database?
Thus, in order to achieve perfect isolation, all the system has to do is to ensure that when transactions are running concurrently, the final state is equivalent to a state of the system that would exist if they were run serially.
How do I check my db isolation level?
To find the isolation level setting for a database, query the sys.databases view:SELECT name, is_read_committed_snapshot_on.FROM sys.databases.WHERE name = DB_NAME();
Which of the following is default isolation level in transaction?
Transaction Isolation Levels The default isolation level is REPEATABLE READ . Other permitted values are READ COMMITTED , READ UNCOMMITTED , and SERIALIZABLE .
Does snapshot isolation prevent phantom reads?
Snapshot Isolation level protects from dirty reads, non repeatable reads and Phantom reads.
How do I check my db isolation level?
To find the isolation level setting for a database, query the sys.databases view:SELECT name, is_read_committed_snapshot_on.FROM sys.databases.WHERE name = DB_NAME();
What is default isolation level?
The database isolation level specifies the degree to which your program is isolated from the concurrent actions of other programs. The default isolation level for all ANSI-compliant databases is Repeatable Read.
Which is the most restrictive isolation level in transaction?
Repeatable Read –Repeatable Read – This is the most restrictive isolation level. The transaction holds read locks on all rows it references and writes locks on referenced rows for update and delete actions. Since other transactions cannot read, update or delete these rows, consequently it avoids non-repeatable read.
What is the meaning of the transaction isolation level Transaction_repeatable_read?
TRANSACTION_REPEATABLE_READ means that Derby issues locks to prevent only dirty reads and nonrepeatable reads, but not phantoms. It does not issue range locks for selects. TRANSACTION_READ_COMMITTED.
What is implicit transaction?
An implicit transaction, by definition, is a single statement which makes it possible to enforce the semantics of snapshot isolation even with DDL statements. Queries that run on read-only replicas are always mapped to the snapshot transaction isolation level.
Why is metadata disallowed?
It is disallowed because the metadata is not versioned. A concurrent update to metadata can lead to inconsistency if mixed with snapshot isolation.". This error can occur if you are querying metadata under snapshot isolation and there is a concurrent DDL statement that updates the metadata that is being accessed under the snapshot isolation. ...
What is exclusive lock?
A transaction always gets an exclusive lock on any data it modifies, and holds that lock until the transaction completes, regardless of the isolation level set for that transaction. For more details, see the Transaction Locking and Row Versioning Guide.
Does SQL Server support versioning?
SQL Server does not support versioning of metadata. For this reason, there are restrictions on what DDL operations can be performed within an explicit transaction running under snapshot isolation. The following DDL statements are not permitted under snapshot isolation after a BEGIN TRANSACTION statement: ALTER TABLE.
Symptoms
Assume that you use the TransactionScope class in Microsoft SQL Server 2014 client-side source code, and you do not explicitly open the SQL Server connection in a transaction. When the SQL Server connection is released, the transaction isolation level is reset incorrectly.
Resolution
The issue was fixed in the following cumulative updates for SQL Server: