Sign inTry Free

Important

Helios features are now enabled during weekly update windows and are no longer directly tied to SingleStore engine releases. Refer to the release notes to view the latest features available in your Helios cluster.

JSON_LENGTH

On this page

The JSON_LENGTH() function computes the length of a JSON map or array.

JSON_LENGTH(json)

Arguments

  • json: a valid JSON array or map.

Return Value

  • the length as an integer.

  • SQL NULL if json is not a valid JSON array or map.

Examples

SELECT JSON_LENGTH('true');
+---------------------+
| JSON_LENGTH('true') |
+---------------------+
|                NULL |
+---------------------+
SELECT JSON_LENGTH('[1,2,3]');
+------------------------+
| JSON_LENGTH('[1,2,3]') |
+------------------------+
|                      3 |
+------------------------+
SELECT JSON_LENGTH('{"alpha": 1, "beta": 2}');
+----------------------------------------+
| JSON_LENGTH('{"alpha": 1, "beta": 2}') |
+----------------------------------------+
|                                      2 |
+----------------------------------------+

Note

A JSON or Javascript null value is distinct from SQL NULL.

Last modified:

Was this article helpful?

On this page

Was this article helpful?

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.

  1. (Optional) Run the following command to view the associated signature files.

    curl undefined

  2. 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.

      curl -O undefined

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

    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

Try Out This Notebook to See What’s Possible in SingleStore

Get access to other groundbreaking datasets and engage with our community for expert advice.

Sign UpLog In