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Short Description
PostgreSQLDataWriter Attributes
See also

Short Description

PostgreSQLDataWriter loads data into PostgreSQL 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

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


PostgreSQLDataWriter does not propagate metadata.

PostgreSQLDataWriter has no metadata templates.

PostgreSQLDataWriter Attributes

AttributeReqDescriptionPossible values
Path to psql utilityyes

The name of a psql utility, including the path. Must be installed and configured on the same machine where CloverETL runs. Psql command line tool must be available.

Host Host where database server is located.localhost (default) | other host

The name of the database into which the records should be loaded.

Database tableyes

Name of the database table into which the records should be loaded.

User name 

PostgreSQL username to be used when connecting to the server.

If empty, the username of current user is used.

Fail on error 

By default, a graph fails upon each error. If you want to have the standard behavior of PostgreSQL database, you need to switch this attribute to false. If set to false, a graph will run successfully even with some errors as it happens with PostgreSQL database.

true (default) | false
Path to control script 

The name of a command file containing the \copy statement, including path. For more information, see Path to Control Script.

Column delimiter 

Delimiter used for each column in data. Field values must not include this delimiter as their part.

tabulator character (default in text mode) | comma (default in CSV mode)
Loader input file 

The name of an input file to be loaded, including the path. For more information, see Loader Input File


All parameters that can be used as parameters by the psql utility or the \copy statement. 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.



PostgreSQLDataWriter loads data into database using PostgreSQL database client.

PostgreSQLDataWriter 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.


PostgreSQL client utility (psql) must be installed and configured on the same machine where CloverETL runs.

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

Path to Control Script

The name of the command file containing the \copy statement, including the path.

  • If it is not set, command file is created in Clover temporary directory and it is deleted after the load finishes.

  • If it is set, but the specified command file does not exist, a temporary file is created with the specified name and path and it is not deleted after the load finishes.

  • If it is set and the specified command file exists, this file is used instead of the file created by Clover. The file is not deleted after the load finishes.

Loader Input File

Name of input file to be loaded, including path.

  • If the input port is connected and this file is not set, no temporary file is created. Data is read from the edge and loaded into the database directly.

  • If it is set, a specified file is created. It 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 exist and must contain data that should be loaded into the database. It is not deleted nor overwritten on another graph run.


Utility psql.exe gets stuck due to asking for password interactively. To avoid the problem, the file .pgpass needs to be set up correctly.

On Windows you need to create the file %APPDATA%\postgresql\pgpass.conf.

On Unix/Linux you need to create the file ~/.pgpass. The file has to have permissions 0600.

The file content is in the following format:


for example:

See corresponding PostgreSQL documentation for more details.

Notes and Limitations

You should not write lists and maps.

See also

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