Value.Metadata

Understanding the Value.Metadata Function

Before we dive into the M code behind the Value.Metadata function, let’s first understand what this function does. Simply put, Value.Metadata is a function that returns metadata information about a given value. This value can be a column, a table, or even a cell in a table.

The metadata information returned by this function includes details about the data type of the value, its length, and other properties such as its culture and format settings. This information can be extremely useful when working with large datasets or when trying to understand the structure of a data source.

The M Code Behind the Value.Metadata Function

The M code behind the Value.Metadata function is relatively simple and easy to understand. The function takes a single parameter, which is the value for which metadata information is required. The M code for the Value.Metadata function is as follows:

As you can see, the function takes the input value and passes it to the Value.Metadata function. The output of the Value.Metadata function is then returned as the result of the Value.Metadata function.

Use Cases for the Value.Metadata Function

Now that we understand the M code behind the Value.Metadata function, let’s explore some of its use cases. Here are a few scenarios where the Value.Metadata function can be particularly useful:

1. Understanding the Structure of a Data Source

When working with a large dataset, it can be challenging to understand the structure of the data source. The Value.Metadata function can be used to extract metadata information about the columns and tables in the dataset, helping users to better understand the structure of the data source.

2. Formatting Data Based on Culture

The metadata returned by the Value.Metadata function includes information about the culture and format settings of the value. This information can be used to format data correctly based on the user’s preferred culture settings.

3. Validating Data Types

The metadata returned by the Value.Metadata function includes information about the data type of the value. This information can be used to validate data types and ensure that data is being imported or exported correctly.

4. Filtering Data Based on Length

The metadata returned by the Value.Metadata function also includes information about the length of the value. This information can be used to filter data based on its length, which can be particularly useful when working with text or string data.

The Power Query M function Value.Metadata is a powerful tool that allows users to extract metadata information from different types of data sources. The M code behind this function is relatively simple and easy to understand, and the function can be used in a variety of scenarios to help users better understand their data sources.

Whether you’re trying to understand the structure of a large dataset or validate data types, the Value.Metadata function can be an extremely useful tool in your Power Query toolkit. So next time you’re working with a complex data source, don’t forget to give the Value.Metadata function a try!

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