# tDenormalize Standard properties

These properties are used to configure tDenormalize running in the Standard Job framework.

The Standard tDenormalize component belongs to the Processing family.

The component in this framework is available in all Talend products.

## Basic settings

| Properties | Description |
| --- | --- |
| Schema and Edit Schema | <ul> <li> <p>A schema is a row description. It defines the number of fields            (columns) to be processed and passed on to the next component. When you create a Spark            Job, avoid the reserved word <kbd>line</kbd> when naming the            fields.</p> <p>Click <span>Edit        schema</span> to make changes to the schema. If the current schema is of the <span>Repository</span> type, three options are available:</p> <ul> <li> <p> <span>View schema</span>: choose this                option to view the schema only.</p> </li> <li> <p> <span>Change to built-in property</span>:                choose this option to change the schema to <span>Built-in</span> for local changes.</p> </li> <li> <p> <span>Update repository connection</span>:                choose this option to change the schema stored in the repository and decide whether                to propagate the changes to all the Jobs upon completion.</p> <p>If you just want to                propagate the changes to the current Job, you can select <span>No</span> upon completion and choose this schema metadata                again in the <span>Repository Content</span>                window.</p> </li> </ul> </li> <li> <p> <span>Built-In</span>: You create and store the schema locally for this component                only.</p> </li> <li> <p> <span>Repository</span>: You have already created the schema and stored it in the                Repository. You can reuse it in various projects and Job designs.</p> </li> </ul> |
| To denormalize | In this table, define the parameters used to denormalize your columns.<br><br><ul> <li> <span>Column</span>: Select the column to                        denormalize.</li> <li> <span>Delimiter</span>: Type in the separator you                        want to use to denormalize your data between double quotes.</li> <li> <span>Merge same value</span>: Select this check                        box to merge identical values.</li> </ul> |

## Advanced settings

| Properties | Description |
| --- | --- |
| Null value as an empty string in concatenation | Select this check box to convert null values to empty strings.<br><br>If an<br>input column in the To denormalize table is null, and<br>the column output type is "String", the null value is replaced with an empty<br>string. |
| tStatCatcher Statistics | Select this check box to collect the log data at component level. Note that<br>this check box is not available in the Map/Reduce version of the component. |

## Global Variables

| Variables | Description |
| --- | --- |
| Global Variables | ERROR\_MESSAGE: the error message generated by the<br>component when an error occurs. This is an After variable and it returns a string. This<br>variable functions only if the Die on error checkbox is<br>cleared, if the component has this checkbox.<br><br><br>NB\_LINE: the number<br>of rows read by an input component or transferred to an output component. This is an<br>After variable and it returns an integer.<br><br>A Flow variable functions during the execution of a component<br>while an After variable functions after the execution of the component.<br><br>To fill up a field or expression with a variable, press Ctrl+Space to access the variable list and choose the variable to use from<br>it.<br><br>For more information about variables, see [Using contexts and variables](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). |

## Usage

| Usage guidance | Description |
| --- | --- |
| **Usage rule** | This component can be used as intermediate step in a data flow. |
| Limitation | Note that this component may change the order in the incoming Java<br>flow. |