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Description

This error indicates that a database operation, typically involving spatial data or other measurements, references a unit of measure that MySQL does not recognize or support. It occurs when a function or command expects a valid unit identifier, but the provided string does not match any known units within the server's configuration or supported standards.

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Error Message

There's no unit of measure named '%s'.

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Known Causes

4 known causes

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Incorrect Unit Name Spelling

The specified unit of measure contains a typographical error or is misspelled, preventing MySQL from recognizing it.

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Unsupported Unit of Measure

The unit of measure specified, while potentially valid in other contexts, is not recognized or supported by the current MySQL server version or its configuration.

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Case Sensitivity Mismatch

The unit name provided might not match the expected case (e.g., 'meter' vs 'Meter') that MySQL requires for recognized units.

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Invalid Context or Syntax

The unit name might be missing required quotes, or it's being used in a SQL context where units of measure are not expected or are improperly formatted.

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Solutions

4 solutions available

1. Correct the Unit of Measure Name easy

Typos or incorrect names are the most common cause; verify and correct the unit name.

1

Identify the exact unit of measure name that is causing the error. This is usually provided in the error message itself (the '%s' placeholder).

2

Review your SQL statements, application code, or configuration files where this unit of measure is being used. Look for potential typos, case sensitivity issues, or incorrect abbreviations.

3

Correct the misspelled or incorrect unit of measure name to match the expected value. For example, if the error says 'There's no unit of measure named 'meterz'', change it to 'meters'.

4

Re-run the operation that caused the error after making the correction.

2. Verify Existing Units of Measure in the Database medium

Ensure the unit of measure you're trying to use is actually defined in your MySQL database.

1

Connect to your MySQL server using a command-line client or a GUI tool.

mysql -u your_user -p

2

Select the database where the unit of measure is expected to be defined.

USE your_database_name;

3

Query the table that stores your units of measure. The table name and column names will vary depending on your application's schema. A common scenario might involve a table named 'units' or 'measurement_units'. Replace 'units_table' and 'unit_name_column' with your actual table and column names.

SELECT unit_name_column FROM units_table;

4

Examine the output to see if the unit of measure causing the error exists. Pay close attention to spelling and capitalization.

5

If the unit of measure is missing, you will need to add it. See the 'Add the Missing Unit of Measure' solution.

3. Add the Missing Unit of Measure medium

If the unit is genuinely not defined, add it to your database schema.

1

Connect to your MySQL server.

mysql -u your_user -p

2

Select the relevant database.

USE your_database_name;

3

Execute an INSERT statement to add the new unit of measure. Replace 'units_table', 'unit_name_column', and 'new_unit_name' with your actual table, column, and the desired unit name. You might have other columns in your units table (e.g., 'abbreviation', 'description') that you'll need to populate as well.

INSERT INTO units_table (unit_name_column) VALUES ('new_unit_name');

4

Verify the insertion by querying the units table again.

SELECT unit_name_column FROM units_table WHERE unit_name_column = 'new_unit_name';

5

Re-run the operation that previously failed.

4. Review Application Configuration for Unit Definitions medium

Some applications manage their own unit definitions; check their configuration files.

1

Identify the application or system that is interacting with MySQL and causing this error.

2

Locate the configuration files for this application. These can be in various formats like `.ini`, `.yaml`, `.json`, or custom formats.

3

Search within these configuration files for sections related to units of measure, measurements, or quantities. Look for entries that define the unit name that is causing the error.

4

Correct any typos or inconsistencies in the unit names defined in the application's configuration.

5

Restart the application or service after making configuration changes for them to take effect.

6

Re-run the operation that triggered the error.

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Related Errors

5 related errors

MySQL Error 3902: Invalid Unit of Measure