tFileInputORC Standard properties - 7.3

ORC

Version
7.3
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Content
Data Governance > Third-party systems > File components (Integration) > ORC components
Data Quality and Preparation > Third-party systems > File components (Integration) > ORC components
Design and Development > Third-party systems > File components (Integration) > ORC components

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

The Standard tFileInputORC component belongs to the File family.

Note: If you are using a Windows platform, make sure Hadoop Winutils and Microsoft Visual C++ 2010 Service Pack 1 Redistributable Package MFC Security Update are installed before using this component. The two links also give the installation information.

The component in this framework is available in all subscription-based Talend products.

Note: This component is available only when you have installed the R2021-10 Studio Monthly update or a later one delivered by Talend. For more information, check with your administrator.

Basic settings

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.

  • 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.

Click Edit schema to make changes to the schema.
Note: If you make changes, the schema automatically becomes built-in.
  • 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.

Note: Column names are case-sensitive and must match the column names defined in the ORC file.

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 Talend Studio User Guide.

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.

File name

Name or path to the input file and/or the variable to be used.

For further information about how to define and use a variable in a Job, see Talend Studio User Guide.

Warning: Use absolute path (instead of relative path) for this field to avoid possible errors.

Advanced settings

Batch size

Enter the number of lines in each batch to be processed.

tStatCatcher Statistics

Select this check box to gather the Job processing metadata at a Job level as well as at each component level.

Global Variables

Global Variables

NB_LINE: the number of rows read by an input component or transferred to an output component. 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 check box is cleared, if the component has this check box.

FILE_PATH: the path pointing to the folder or the file being processed on Box. This is a Flow variable and it returns a string.

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 further information about variables, see Talend Studio User Guide.

Usage

Usage rule

Use this component to retrieve data from ORC files. This component also passes retrieved data to the subsequent component.