SET and SET SESSION

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Sets a session variable. Its value remains in effect for the duration of the current database connection.

Warning

SingleStore recommends using the SET SESSION statement for session variables that are only referenced by the aggregator nodes on which the variable is set. For session variables with values that need to be propagated to leaf nodes from the aggregator nodes, use a global setting instead.

Syntax

SQL

SET [SESSION] variable_name = value;
SET @@SESSION.variable_name = value;

Arguments

variable_name: Name of the session variable to configure.
value: The session variable's value.

Remarks

The SESSION keyword is optional. Including it does not change this command’s behavior.
The @@SESSION.variable_name syntax is supported for compatibility with other database systems, such as MySQL.
This command can be run on a Master or Child aggregator node to set sync variables, but otherwise must be run on the Master Aggregator.
Refer to Engine Variables for information on other ways to set variables.
SET PASSWORD sets the user password. Refer to SET PASSWORD topic for details.

Warning

SET NAMES, SET CHARSET, and SET CHARACTER SET are non-operational in SingleStore. These commands are included only for MySQL compatibility.

Examples

The following queries set the value of the session variable net_read_timeout to 5000.

SQL

SET net_read_timeout = 5000;

SET @@SESSION.net_read_timeout = 5000;

The following query retrieves the value of the session variable net_read_timeout.

SQL

SELECT @@net_read_timeout;

Refer to Assigning Expressions to Variables for more examples.

Last modified: June 16, 2026

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Verification instructions

Note: You must install cosign to verify the authenticity of the SingleStore file.

Use the following steps to verify the authenticity of singlestoredb-server, singlestoredb-toolbox, singlestoredb-studio, and singlestore-client SingleStore files that have been downloaded.

You may perform the following steps on any computer that can run cosign, such as the main deployment host of the cluster.

(Optional) Run the following command to view the associated signature files.
Shell
```
curl undefined
```
Download the signature file from the SingleStore release server.
- Option 1: Click the Download Signature button next to the SingleStore file.
- Option 2: Copy and paste the following URL into the address bar of your browser and save the signature file.
- Option 3: Run the following command to download the signature file.
  Shell
```
curl -O undefined
```

After the signature file has been downloaded, run the following command to verify the authenticity of the SingleStore file.

Shell

echo -n undefined |
    cosign verify-blob --certificate-oidc-issuer https://oidc.eks.us-east-1.amazonaws.com/id/CCDCDBA1379A5596AB5B2E46DCA385BC \
      --certificate-identity https://kubernetes.io/namespaces/freya-production/serviceaccounts/job-worker \
      --bundle undefined \
      --new-bundle-format -

Verified OK