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.

Click Sync columns to retrieve
the schema from the previous component connected in the Job.

Built-in: You create and store
the schema locally for this component only. Related topic: see

Talend Studio User
Guide.

Repository: You have already
created the schema and stored it in the Repository. You can reuse it
in various projects and Jobs. Related topic: see
Talend Studio User
Guide.

Logical operator between conditions

Select the logical operator between the filter conditions defined
in the Conditions panel.

Two operators are available: Or,
And.

Conditions

Select the type of WHERE clause along with the values and the
columns to use for row filtering.

Input Column: Select the column
to filter in the list.

Operator: Select the type of the
WHERE clause: =, < >,
>, <,
>=, <=, LIKE,
IN, NOT
IN, and EXIST
IN.

Values: Type in the values to be
used in the WHERE clause.

Negate: Select this check box to
enable the condition that is opposite to the current setting.

Use custom SQL

Customize a WHERE clause by selecting this check box and editing
in the SQL Condition field.

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

NB_LINE: the number of rows read by an input component or
transferred to an output component. This is a Flow variable and it returns an
integer.

QUERY: the query statement being processed. This is a Flow
variable and it returns a string.

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.

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 rule

This component is an intermediary component. The use of the
corresponding connection and commit components is recommended when
using this component to allow a unique connection to be open and
then closed during the Job execution.