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  1. Write, correctly, these parameters in the main window:
    Creating the PostgreSQL DSN record - parameters
    Database – name of existing database.
    Server – address of server, which PostgreSQL service runs on (or localhost in case of the same computer),
    Port – port number, which PostgreSQL service listens on.

    After entering the name and password and clicking the Test, D2000 should connect to database successfully. If the connection failed, you must check the entered data and settings of PostgreSQL service, which database runs on (see the section Connection to PostgreSQL database running on dedicated machine). Warning! For security reasons, do not keep the name and password filled in the final state!

    For proper functioning with D2000 System, it is necessary to change other default parameters.
     
  2. In Datasource/Page1 tab, set the following parameters:
    Creating the PostgreSQL DSN record - settings
    CacheSize can be set at your discretion.

  3. In Datasource/Page2 tab, keep these settings:
    Creating the PostgreSQL DSN record - settings
    The  highlighted parameters must be set as follows:
    Updateable Cursors – the ability to use cursors to writes (enables updateable cursor emulation in the driver)
    bytea as LO - enables support for writing Large Objects (blobs) into bytea columns
    Server side prepare - compiled cursors (e.g. for parameterized queries) on the server side can improve performance. If possible, we recommend that you enable this option.
    Level of rollback on errors - if transaction operations are used and there may be an error during command execution (e.g. INSERT fails because of a unique index violation), then if the parameter is set to Statement, only the last command is rolled back. If the parameter is set to Transaction, the entire transaction is rolled back. On the other hand, the Statement setting makes "microcommits" (savepoints) after each operation, which both reduces performance and consumes transactional IDs, which in turn leads to increased vacuuming activity of PostgreSQL database.


This DNS record DSN record can be used for connection to external PostgreSQL database in D2000 System.

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In the event that D2000 System should connect to the remote server, it is necessary to configure DNS record DSN record in ODBC administrator on client according to the previous instructions with the only difference - into Server parameter enter the name or IP address of server, which PostgreSQL database runs on.

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