tSQLTemplateFilterColumns – Docs for ESB 5.x

Component family

ELT/SQLTemplate

Function

tSQLTemplateFilterColumns makes
specified changes to the defined schema of the database table based
on column name mapping. This component has real-time capabilities
since it runs the data filtering on the DBMS itself

Purpose

Helps homogenize schemas by reorganizing, deleting or adding new
columns.

Basic settings

Database Type

Select the type of database you want to work on from the drop-down
list.

Component List

Select the relevant DB connection component in the list if you use
more than one connection in the current Job.

Database name

Name of the database.

Source table name

Name of the table holding the data you want to filter.

Target table name

Name of the table you want to write the filtered data in.

Schema and Edit
schema

A schema is a row description, it defines the number of fields that will be processed
and passed on to the next component. The schema is either built-in
or remote in the Repository.

Click Edit schema to make changes to the schema. If the
current schema is of the Repository type, three options are
available:

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 Job flowcharts. Related topic: see Talend Studio User
Guide.

Column Filters

In the table, click the Filter
check box to filter all of the columns. To select specific columns
for filtering, select the check box(es) which correspond(s) to the
column name(s).

Advanced settings

tStatCatcher Statistics

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

SQL Template

SQL Template List

To add a default system SQL Template:
Click the Add button to
add the default system SQL template(s) in the SQL Template List.

Click in the SQL template field and then click the arrow to
display the system SQL template list. Select the desired system SQL
template provided by Talend.

Note: You can create your own SQL
templates and add them to the SQL Template
List.

To create a user-defined SQL list:

-Select a system template from the SQL
Template list and click on its code in the code box.
You will be prompted by the system to create a new template.

-Click Yes to open the SQL
Template wizard.

-Define your new SQL template in the corresponding fields and
click Finish to close the wizard.
An SQL template editor opens where you can enter the template
code.

-Click the Add button to add the
new created template to the SQL Template
list.

For more information, see Talend Studio User Guide.

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.

QUERY: the SQL 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

This component is used as an intermediary component with other
relevant DB components, especially DB connection components.

Log4j

The activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User
Guide.

For more information on the log4j logging levels, see the Apache documentation at http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.

Limitation

n/a