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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.

APPROX_COUNT_DISTINCT_ACCUMULATE

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The APPROX_COUNT_DISTINCT_ACCUMULATE() function creates a new HyperLogLog state and returns a value representing the new state for a collection of values.

Syntax

APPROX_COUNT_DISTINCT_ACCUMULATE ( expr )

Arguments

expr

An expression evaluating to a scalar value.

expr is typically the name of a column. In this case, APPROX_COUNT_DISTINCT_ACCUMULATE uses values in the column to create a new HyperLogLog state.

Remarks

This function is used in conjunction with APPROX_COUNT_DISTINCT_COMBINE and APPROX_COUNT_DISTINCT_ESTIMATE. To best understand its usage, see the topic Distinct Count Estimation Functions.

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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.

  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

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