Short Description
OracleDataWriter Attributes
See also

Short Description

OracleDataWriter loads data into Oracle database.

Component Data output Input ports Output ports Transformation Transf. required Java CTL Auto-propagated metadata


Port typeNumberRequiredDescriptionMetadata
Input0 [1] Records to be loaded into the databaseAny
Rejected recordsInput 0

[1]  If no file containing data for loading (Loader input file) is specified, input port must be connected.


OracleDataWriter does not propagate metadata.

It has no metadata templates.

Both ports must have the same metadata.

Input metadata has to have the same names as database table names. Otherwise, BD column names has to be used.

OracleDataWriter Attributes

AttributeReqDescriptionPossible values
Path to sqlldr utilityyesName of sqlldr utility, including path. 
TNS nameyesTNS name identifier.E.g.
User nameyes Username to be used when connecting to the Oracle database.  
Passwordyes Password to be used when connecting to the Oracle database.  
Oracle tableyes The name of the database table into which the records should be loaded.  
Control script  Control script for the sqlldr utility. For more information, see Control Script.  
Append  Specifies what should be done with the database table. For more information, see Append Attribute. append (default) | insert | replace | truncate
Log file name The name of the file where the process is logged.${PROJECT}/loaderinputfile.log
Bad file name  The name of the file where the records causing errors are written. ${PROJECT}/loaderinputfile.bad
Discard file name  The name of the file where the records not meeting selection criteria are written. ${PROJECT}/loaderinputfile.dis
DB column names The names of all columns in the database table.E.g. f1;f2;f3
Loader input file  The name of an input file to be loaded, including the path. For more information, see Loader Input File.  
Max error count  The maximum number of allowed insert errors. When this number is exceeded, the graph fails. If no errors are to be allowed, the attribute should be set to 0. To allow all errors, set this attribute to a very high number. 50 (default) | 0-N
Max discard count  The number of records that can be discarded before the graph stops. If set to 1, even single discarded record stops the graph run. all (default) | 1-N
Ignore rows  The number of rows of the data file that should be skipped when loading data to a database. 0 (default) | 1-N
Commit interval  Conventional path loads only: Commit interval specifies the number of rows in the bind array. Direct path loads only: Commit interval identifies the number of rows that should be read from the data file before the data is saved. By default, all rows are read and data is all saved at once, at the end of the load. 64 (default for conventional path) | all (default for direct path) | 1-N
Use file for exchange  By default, on Unix pipe transfer is used. If it is set to true and Loader input file is not set, temporary file is created and used as data source. By default, on Windows temporary file is created and used as data source. However, since some clients do not need a temporary data file to be created, this attribute can be set to false for such clients. false (default on Unix) | true (default on Windows)
Parameters  All parameters that can be used as parameters by the sqlldr utility. These values are contained in a sequence of pairs of the following form: key=value, or key only (if the key value is the boolean true) separated from each other by a semicolon, colon, or pipe. If the value of any parameter contains a semicolon, colon, or pipe as its part, such value must be double quoted.  
Fail on warnings By default, the component fails on errors. By switching the attribute to true, you can make the component fail on warnings. Background: when an underlying bulk-loader utility finishes with a warning, it is just logged to the console. This behavior is sometimes undesirable as warnings from underlying bulk-loaders may seriously impact further processing. For example, 'Unable to extend table space' may result in not loading all data records to a database; hence not completing the expected task successfully. false (default) | true


OracleDataWriter loads data into a database using Oracle database client. It can read data through the input port or from an input file. If the input port is not connected to any other component, data must be contained in an input file that should be specified in the component. If you connect some other component to the optional output port, rejected records are sent to it.

OracleDataWriter's functionality depends on the sqlldr utility. Oracle sqlldr database utility must be installed on the computer where CloverDX runs.

See details on sqlldr utility: Loading data into an Oracle database with SQL*Loader

OracleDataWriter is a bulk loader suitable for uploading many records to a database. To insert several records, you can also use DBOutputTable, which does not require the sqlldr utility.

Control Script

Control script for the sqlldr utility.

  • If specified, both the Oracle table and the Append attributes are ignored. Must be specified if input port is not connected. In such a case, Loader input file must also be defined.

  • If Control script is not set, default control script is used.

Example 56.7. Example of a Control script

    name TERMINATED BY ';',
    value TERMINATED BY '\n'

Append Attribute

  • Append (default)

    Specifies that data is simply appended to a table. Existing free space is not used.

  • Insert

    Adds new rows to the table/view with the INSERT statement. The INSERT statement in Oracle is used to add rows to a table, the base table of a view, a partition of a partitioned table or a subpartition of a composite-partitioned table, or an object table or the base table of an object view.

    An INSERT statement with a VALUES clause adds to the table a single row containing the values specified in the VALUES clause.

    An INSERT statement with a subquery instead of a VALUES clause adds to the table all rows returned by the subquery. Oracle processes the subquery and inserts each returned row into the table. If the subquery selects no rows, Oracle inserts no rows into the table. The subquery can refer to any table, view, or snapshot, including the target table of the INSERT statement.

  • Update

    Changes existing values in a table or in a view's base table.

  • Truncate

    Removes all rows from a table or cluster and resets the STORAGE parameters to the values when the table or cluster was created.

Loader Input File

Name of input file to be loaded, including path.

  • If it is not set, a loader file is created in CloverDX or OS temporary directory (on Windows) (unless Use file for exchange is set to false) or named pipe is used instead of temporary file (in Unix). The created file is deleted after the load finishes.

  • If it is set, specified file is created. The created file is not deleted after data is loaded and it is overwritten on each graph run.

  • If the input port is not connected, this file must be specified, must exist and must contain data that should be loaded into database. At the same time, Control script must be specified. The file is not deleted nor overwritten.

Notes and Limitations

OracleDataWriter does not support writing lists and maps.


Load records (fields username, surname) into database table users2. The Oracle database is installed on and listens on 1521. Database login smithj and password MySecretPassword.


Install sqlldr utility, if it is not installed.

Set up the following attributes of the component:

Path to sqlldr utility/app/product/12.1.0/client_1/bin/sqlldr
User namesmithj
Oracle tableusers2

Metadata field names have to match database table field names.

Case 2: database table has columns user and surn.

Set up attribute DB Column names to user;surn.

See also

Common Properties of Components
Specific Attribute Types
Common Properties of Writers
Writers Comparison