# tLogRow Standard properties These properties are used to configure tLogRow running in the Standard Job framework. The Standard tLogRow component belongs to the Logs & Errors family. The component in this framework is available in all Talend products. ## Basic settings | Properties | Description | | --- | --- | | Schema and Edit schema |

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 line when naming the fields.

Click Edit schema to make changes to the schema. If the current schema is of the Repository type, three options are available:
- View schema: choose this option to view the schema only.
- Change to built-in property: choose this option to change the schema to Built-in for local changes.
- Update repository connection: choose this option to change the schema stored in the repository and decide whether to propagate the changes to all the Jobs upon completion.
  
  If you just want to propagate the changes to the current Job, you can select No upon completion and choose this schema metadata again in the Repository Content window.
This component offers the advantage of the dynamic schema feature. This allows you to retrieve unknown columns from source files or to copy batches of columns from a source without mapping each column individually. For further information about dynamic schemas, see Dynamic schema.

This dynamic schema feature is designed for the purpose of retrieving unknown columns of a table and is recommended to be used for this purpose only; it is not recommended for the use of creating tables.
Built-In: You create and store the schema locally for this component only.
Repository: You have already created the schema and stored it in the Repository. You can reuse it in various projects and Job designs.

| | Sync columns | Click to synchronize the output file schema with the input
file schema. The Sync function is available only when the component is
linked with the preceding component using a Row connection. | | Basic | Displays the output flow in basic mode. | | Table | Displays the output flow in table cells. | | Vertical | Displays each row of the output flow as a key-value list.

With this mode selected, you can choose to show either the unique name
or the label of component, or both of them, for each output row. | | Separator

(For Basic mode only) | Enter the separator which will delimit data on the Log display. | | Print header

(For Basic mode only) | Select this check box to include the header of the input
flow in the output display. | | Print component unique name in front of each
output row

(For Basic mode only) | Select this check box to show the unique name the component in front
of each output row to differentiate outputs in case several tLogRow components are used. | | Print schema column name in front of each
value

(For Basic mode only) | Select this check box to retrieve column labels from output
schema. | | Use fixed length for values

(For Basic mode only) | Select this check box to set a fixed width for the value
display. | | Print content with log4j | Select this check box to output the data flow content if the log4j
feature is activated and the log4j output level is set to INFO or lower
than INFO for your Job. For how to activate the log4j feature and
customize the log4j output level, refer to *Talend Studio*
*User
Guide*. | ## Global Variables | Variables | Description | | --- | --- | | Global Variables | NB\_LINE:
the number of rows processed. This is an After variable and it returns an integer.

ERROR\_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error checkbox is
cleared, if the component has this checkbox.

A Flow variable functions during the execution of a component
while an After variable functions after the execution of the component.

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
it.

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
or as an end object in the Job flowchart. |