# Execution Data Profile

## Execution Data Profile

### Description

An Apache Hop Execution Data Profile builds data profiles as data flow through pipelines. A number of data profilers can be selected and configure the fine tune the type and detail of the data that is profiled.

### Options

| Option               | Description                                                                           |
| -------------------- | ------------------------------------------------------------------------------------- |
| Name                 | The name to be used for this Execution Data Profile                                   |
| Description          | A description to be used for this Execution Data Profile                              |
| Data Samplers to use | One or more data samplers to use with this Execution Data Profile. See details below. |

### Data Samplers

| Data Sampler             | Description                                                                  | Options                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| ------------------------ | ---------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Data profile output rows | Allow for some basic data profiling to be performed on transform output rows | <ul><li>Sample size: This is the maximum number of sample rows kept for any discovered profiling result (default: 25)</li><li>Last transforms only: only perform data profiling on pipeline endpoints (last transforms)? (default: true)</li><li>Minima: store the minimum value for this data profile (default: true)</li><li>Maxima: store the maximum value for this data profile (default: true)</li><li>Count nulls: count null values for this data profile (default: true)</li><li>Count non-nulls: count non-null values for this data profile (default: true)</li><li>Min length: store the minimum lengths for this data profile (default: true)</li><li>Max length: store the maximum lengths for this data profile (default: true)</li></ul> |
| First output rows        | Samples the first rows of a transform output                                 | Sample size (default: 100)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Last output rows         | Samples the last rows of a transform output                                  | Sample size (default: 100)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Random output rows       | Do reservoir sampling on the output rows of a transform                      | Sample size (default: 100)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |


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