tMySQLValidRows

Checks MySQL database rows against Data Quality patterns (regular
expression).

tMySQLValidRows allows you to extract DB rows that match
a given Data Quality pattern.

tMySQLValidRows Standard properties

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

The Standard
tMySQLValidRows component belongs to the Data Quality and the Databases families.

This component is available in the Palette of the Studio only if you have subscribed to one of the Talend Platform products.

Basic settings

Validation type	Either Regex pattern validation or DQ rule validation. Regex pattern validation: Validate data in the database against regex patterns. DQ rule validation: Validate data in the database against DQ rules.
Regex pattern validation	Analyzed column: select from the schema list the column to analyze. Custom pattern: select this check box to define manually your own customized regular expression against which you want to check the DB rows. Patterns list: select from the pattern list the pattern against which you want to check the DB rows.
DQ rule validation	DQ rule list: select from the list the rule against which you want to check the DB rows. Query type: Either Built-in or Repository. Built-in: fill in manually the query statement or build it graphically using SQLBuilder. Repository: select the relevant query stored in the Repository. The Query field is filled in accordingly. Guess query: click the Guess Querry button to generate the query which corresponds to your table schema in the Query field. Guess schema: click the Guess Schema button to retrieve the schema from the table. Query: enter your DB query paying particular attention to properly sequence the fields in order to match the schema definition.
Property type	Either Built-in or Repository.
	Built-in: No property data stored centrally.
	Repository: Select the repository file where Properties are stored. The fields that come after are pre-filled in using the fetched data.
DB Version	Select the MySQL version you are using.
Use existing connection	Select this check box and in the Component List click the relevant connection component to reuse the connection details you already defined. Note: When a Job contains the parent Job and the child Job, if you need to share an existing connection between the two levels, for example, to share the connection created by the parent Job with the child Job, you have to: In the parent level, register the database connection to be shared in the Basic settings view of the connection component which creates that very database connection. In the child level, use a dedicated connection component to read that registered database connection. For an example about how to share a database connection across Job levels, see Talend Studio User Guide.
Host	Database server IP address.
Port	Listening port number of DB server.
Database	Name of the database.
Username and Password	DB user authentication data. To enter the password, click the […] button next to the password field, and then in the pop-up dialog box enter the password between double quotes and click OK to save the settings.
Schema and Edit schema	A schema is a row description, it defines the number of fields to be processed and passed on to the next component. The schema is either Built-in or stored remotely in the Repository.
	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 and thus reuse it when needed. Related topic: see Talend Studio User Guide.
Table Name	Enter the name of the table to be read.
Where clause	Enter a WHERE clause to define a row filter on the table. You can use the WHERE clause to filter the rows you want to analyze in the table. This WHERE clause enables you then to retrieve valid and invalid data that match certain specified criteria or conditions.

Advanced settings

Additional JDBC Parameters	Specify additional connection properties for the DB connection you are creating. This option is not available if you have selected the Use an existing connection check box in the Basic settings. Note: You can press Ctrl+Space to access a list of predefined global variables.
Enable stream	Select this check box to enables streaming over buffering. This allows reading from large tables without consuming large amount of memory in order to optimize the performance.
Trim all the String/Char columns	Select this check box to remove leading and trailing whitespace from all the String/Char columns.
Trim column	Remove leading and trailing whitespace from defined columns. Note: Clear the Trim all the String/Char columns to enable Trim column.
tStatCatcher Statistics	Select this check box to collect log data at the 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. 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.

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 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

Usage rule	This component can be used as a start or intermediary step. It requires an output flow.
Dynamic settings	Click the [+] button to add a row in the table and fill the Code field with a context variable to choose your database connection dynamically from multiple connections planned in your Job. This feature is useful when you need to access database tables having the same data structure but in different databases, especially when you are working in an environment where you cannot change your Job settings, for example, when your Job has to be deployed and executed independent of Talend Studio . The Dynamic settings table is available only when the Use an existing connection check box is selected in the Basic settings view. Once a dynamic parameter is defined, the Component List box in the Basic settings view becomes unusable. For examples on using dynamic parameters, see Scenario: Reading data from databases through context-based dynamic connections and Scenario: Reading data from different MySQL databases using dynamically loaded connection parameters. For more information on Dynamic settings and context variables, see Talend Studio User Guide.

Usage rule

This component can be used as a start or intermediary step. It
requires an output flow.

Dynamic settings

Click the [+] button to add a
row in the table and fill the Code field
with a context variable to choose your database connection dynamically from
multiple connections planned in your Job. This feature is useful when you
need to access database tables having the same data structure but in
different databases, especially when you are working in an environment where
you cannot change your Job settings, for example, when your Job has to be
deployed and executed independent of
Talend Studio
.

The Dynamic settings table is
available only when the Use an existing
connection check box is selected in the Basic settings view. Once a dynamic parameter is
defined, the Component List box in the
Basic settings view becomes unusable.

For examples on using dynamic parameters, see Scenario: Reading data from databases through context-based dynamic connections and Scenario: Reading data from different MySQL databases using dynamically loaded connection parameters. For more information on Dynamic
settings and context variables, see
Talend Studio User Guide.

Related scenarios

Document get from Talend https://help.talend.com

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Docs 6.x

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tMySQLValidRows – Docs for ESB 6.x

tMySQLValidRows