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COLUMN_STATISTICS

Warning

SingleStore 9.0 gives you the opportunity to preview, evaluate, and provide feedback on new and upcoming features prior to their general availability. In the interim, SingleStore 8.9 is recommended for production workloads, which can later be upgraded to SingleStore 9.0.

This view contains information about each column in a given cluster. Each row displays information about a given column on a given database partition.

Column Name

Description

DATABASE_NAME

The name of the related database.

SCHEMA_NAME

The name of the related database (this is the same as DATABASE_NAME, and exists for MySQL compatibility).

TABLE_NAME

The name of the related table.

COLUMN_NAME

The name of a given column.

ORDINAL

The ID for the related partition.

HOST

The hostname or IP address for the related node.

PORT

The port number of the related node.

NODE_TYPE

The type of node: master aggregator (MA), child aggregator (CA), or leaf node (LEAF).

PARTITION_TYPE

The type of partition: master or secondary.

MEMORY_USE

The amount of memory, in MB, being used by a given column. Only applies to fixed-width fields in rowstore tables, otherwise it will be reported as NULL.

For columnstore, use the TABLE_STATISTICS view to see how much memory (RAM) the table is using. This will include all columns as there is no per-column memory use tracking for columnstore tables.

HISTOGRAM

This column exists for MySQL compatibility and is always blank.

Last modified: December 12, 2023

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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