tJDBCColumnList – Docs for ESB 5.x

Component family

Databases/JDBC

Function

Iterates on all columns of a given table through a defined JDBC
connection.

Purpose

Lists all column names of a given JDBC table.

Basic settings

Database Type

Select the type of the database to be accessed.

Component list

Select the tJDBCConnection
component in the list if more than one connection are planned for
the current Job.

Table name

Enter the name of the table.

Die on error

Select this check box to stop the execution of the Job when an error occurs.

Clear the check box to skip any rows on error and complete the process for error-free rows.
When errors are skipped, you can collect the rows on error using a Row
> Reject link.

Global Variables

CURRENT_COLUMN: the name of the column currently iterated
upon. This is a Flow variable and it returns a string.

CURRENT_COLUMN_TYPE: the ID of the type of the column
currently iterated upon. This is a Flow variable and it returns an integer.

CURRENT_COLUMN_TYPE_NAME: the name of the type of the
column currently iterated upon. This is a Flow variable and it returns a string.

CURRENT_COLUMN_PRECISION: the precision of the column
currently iterated upon. This is a Flow variable, and it returns an integer.

CURRENT_COLUMN_SCALE: the scale of the column currently
iterated upon. This is a Flow variable, and it returns an integer.

NB_COLUMN: the number of columns iterated upon so far.
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.

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 to be used along with JDBC components,
especially with tJDBCConnection.

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