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LOCATE

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The LOCATE() function returns the first position of the specified search string.

Syntax

LOCATE (needle, haystack)
LOCATE (needle, haystack, startpos)

Arguments

  • needle: String to search for.

  • haystack: Any string or binary object.

  • startpos: Character position to start searching at.

Note

This function is identical to INSTR but with the arguments reversed.

Return Type

Integer position, one-indexed. 0 if not found.

Examples

SELECT LOCATE('i', 'ohai');
+---------------------+
| LOCATE('i', 'ohai') |
+---------------------+
|                   4 |
+---------------------+
SELECT LOCATE('z', 'ohai');
+---------------------+
| LOCATE('z', 'ohai') |
+---------------------+
|                   0 |
+---------------------+
SELECT LOCATE('i', 'ohaiohai', 6);
+----------------------------+
| LOCATE('i', 'ohaiohai', 6) |
+----------------------------+
|                          8 |
+----------------------------+

Warning

Implicit Collation

When character_set_server is set to utf8, string literals with characters using 4-byte encoding are implicitly assigned binary collation and processed as a sequence of bytes rather than characters. This implicit conversion to binary collation causes string functions to return unexpected results. To avoid using implicit binary collation, either use explicit type casting or use database columns defined with the utf8mb4 character set.

For more information, refer to Implicit Collation in Special Cases.

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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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