PostgreSQLDataWriter 64x64

    Short Description



    PostgreSQLBulkWriter Attributes



    Notes and Limitations


    See also

    Short Description

    PostgreSQLBulkWriter loads data into PostgreSQL database.

    When to use PostgreSQLBulkWriter

    This component requires installation and configuration of a database native client. The client must be installed on the same machine as CloverDX Server (when working in a server project) or CloverDX Designer (when working in a local project). Due to this overhead, we recommend using this component only if you require significantly higher loading performance than with DatabaseWriter which should be used in typical scenarios.

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





    Port type Number Required Description Metadata




    Records to be loaded into the database



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


    PostgreSQLBulkWriter does not propagate metadata.

    PostgreSQLBulkWriter has no metadata templates.

    PostgreSQLBulkWriter Attributes

    Attribute Req Description Possible values


    Path to psql utility


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


    Host where database server is located.

    localhost (default) | other host



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

    Database table


    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 the 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.


    PostgreSQLBulkWriter loads data into database using PostgreSQL database client.

    PostgreSQLBulkWriter 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 CloverDX runs.

    PostgreSQLBulkWriter is a bulk loader suitable for uploading many records to database. To insert several records, you can also use DatabaseWriter, 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, a command file is created in CloverDX 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 CloverDX. 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:


    Loading data to PostgreSQL database

    Load records (productID, amount) to table products of PostgreSQL database postgres on with username smithj.


    Install the 'psql' utility.

    Set up the following attributes of PostgreSQLBulkWriter.

    Attribute Value

    Path to psql utility

    C:/Program Files/PostgreSQL/9.5/bin/psql.exe




    Database table


    User Name


    In case the server uses a non-standard port number, specify the Port parameter in the Parameters attribute.

    Notes and Limitations

    You should not write lists and maps.


    Version Compatibility Notice


    PostgreSQLDataWriter was renamed to PostgreSQLBulkWriter.