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Component family
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Databases / SAP Hana
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Function
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tSAPHanaOutput writes, updates,
makes changes or suppresses entries in a SAP Hana database.
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Purpose
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tSAPHanaOutput executes the
action defined on the table and/or on the data contained in the
table, based on the flow incoming from the preceding component in
the Job.
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Basic settings
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Use an existing connection
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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:
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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.
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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.
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DB Version
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Select the SAP Hana Database (HDB) version you are using.
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Host
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Database server IP address.
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Port
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Listening port number of database server.
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Table Schema
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Name of the database schema.
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Username and Password
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Database 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.
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Table
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Name of the table to be written. Note that only one table can be
written at a time.
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Action on table
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On the table defined, you can perform one of the following
operations:
None: No operation is carried
out.
Drop and create table: The table is
removed and created again.
Create table: The table does not
exist and gets created.
Create table if not exists: The
table is created if it does not exist.
Drop table if exists and create:
The table is removed if it already exists and created again.
Clear table: The table content is
deleted.
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Type of table storage
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This option is only available if you create (with or without drop)
the database table. This option allows you to define the way the
data is stored in the table. The following types of table storage
organization are available:
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Row: Data is stored
in rows. It is preferable to use this table type if the
majority of table access involves selecting a few
records, with all attributes selected.
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Column: Data is
stored in columns. It is preferable to use this table
type if the majority of table access will be through a
large number of tuples, with only a few selected
attributes.
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History column:
Creates a table with a particular transaction session
type called HISTORY.
Tables with session type HISTORY support time travel queries. For
more information on HISTORY and time travel queries, see
http://help.sap.com/saphelp_hanaplatform/helpdata/en/20/d56cd075191014b7ea9e4e77477aae/content.htm.
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Global temporary: The
table definition and data can be seen by any user and
any connection during the current session. The table is
truncated at the end of the session.
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Local temporary: The
table definition and data can only be seen by the user
who created the table during the current session. The
table is truncated at the end of the session.
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Action on data
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On the data of the table defined, you can perform:
Insert: Add new entries to the
table. If duplicates are found, the Job stops.
Update: Make changes to existing
entries
Insert or update: Insert a new record. If the record with
the given reference already exists, an update would be made.
Update or insert: Update the record with the given
reference. If the record does not exist, a new record would be inserted.
Delete: Remove entries
corresponding to the input flow.
Warning
It is necessary to specify at least one column as a primary
key on which the Update and
Delete operations are
based. You can do that by clicking Edit
Schema and selecting the check box(es) next to
the column(s) you want to set as primary key(s). For an advanced
use, see Use filed options in
the Advanced settings
view.
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Schema and Edit
Schema
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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.
Since version 5.6, both the Built-In mode and the Repository mode are
available in any of the Talend solutions.
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Built-In: You create and store the schema locally for this
component only. Related topic: see Talend Studio
User Guide.
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Repository: You have already created the schema and
stored it in the Repository. You can reuse it in various projects and Job designs. Related
topic: see Talend Studio User Guide.
When the schema to be reused has default values that are integers or functions, ensure that
these default values are not enclosed within quotation marks. If they are, you must remove
the quotation marks manually.
For more details, see https://help.talend.com/display/KB/Verifying+default+values+in+a+retrieved+schema.
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Click Edit schema to make changes to the schema. If the
current schema is of the Repository type, three options are
available:
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View schema: choose this option to view the
schema only.
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Change to built-in property: choose this option
to change the schema to Built-in for local
changes.
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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.
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Die on error
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This check box is cleared by default. This means that Die on error skips the row when an error
is encountered and completes the process for rows without
errors.
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Advanced settings
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Additional JDBC Parameters
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Specify additional connection properties in the database
connection you are creating. This option is not available if you
have selected Use an existing
connection check box in the Basic settings.
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Commit every
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Enter the number of rows to be completed before committing batches
of rows together into the database. This option ensures transaction
quality (but not rollback) and, above all, better performance at
execution.
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Additional Columns
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This option is not available if you create (with or without drop)
the database table. This option allows you to call SQL functions to
perform actions on columns, which are not insert, nor update
or delete actions, or any other
action that requires particular preprocessing.
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Name: Type in the name of the
schema column to be altered or inserted as new column
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SQL expression: Type in the SQL
statement to be executed in order to alter or insert the relevant
column data.
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Position: Select Before, Replace or After
following the action to be performed on the reference column.
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Reference column: Type in a
column of reference that tSAPHanaOutput can use to locate or replace the new
column or the column to be modified.
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Use field options
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Select this check box to customize a request, especially when
there is double action on data. In that table, you can
define:
Key in update: define the primary
key to use in an update operation.
Key in delete: define the primary
key to use in a delete operation.
Updatable: define the column(s)
to update.
Insertable: define the column(s)
to insert.
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Enable debug mode
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Select this check box to display each step during processing
entries in a database.
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Support null in “SQL WHERE” statement
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Select this check box to validate null in “SQL WHERE”
statement.
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Use Batch Size
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When selected, enables you to define the number of lines in each
processed batch.
Warning
This option is available only when you do not Use an existing connection in
Basic settings.
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tStatCatcher Statistics
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Select this check box to collect log data at the component
level.
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Enable parallel execution
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Select this check box to perform high-speed data processing, by treating multiple data flows
simultaneously. Note that this feature depends on the database or the application ability to
handle multiple inserts in parallel as well as the number of CPU affected. In the Number of parallel executions field, either:
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Enter the number of parallel executions desired.
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Press Ctrl + Space and select the appropriate
context variable from the list. For further information, see Talend Studio
User Guide.
Note that when parallel execution is enabled, it is not possible to use global variables to
retrieve return values in a subjob.
Warning
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The Action on table
field is not available with the parallelization function. Therefore, you
must use a tCreateTable component if you
want to create a table.
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When parallel execution is enabled, it is not possible to use global
variables to retrieve return values in a subjob.
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Dynamic settings
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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 more information on Dynamic settings and context
variables, see Talend Studio User Guide.
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Global Variables
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NB_LINE: the number of rows processed. This is an After
variable and it returns an integer.
NB_LINE_UPDATED: the number of rows updated. This is an
After variable and it returns an integer.
NB_LINE_INSERTED: the number of rows inserted. This is an
After variable and it returns an integer.
NB_LINE_DELETED: the number of rows deleted. This is an
After variable and it returns an integer.
NB_LINE_REJECTED: the number of rows rejected. This is an
After variable and it returns an integer.
QUERY: the SQL query statement processed. This is an After
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.
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Usage
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This component must be connected to an Input component. It allows
you to carry out actions on a table or on the data of a table in an
SAP Hana database. It also allows you to create reject flows using a
Row > Reject link to filter
erroneous data.
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Log4j
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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.
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