The DataDirect JDBC Driver for VMware Tanzu Greenplum is available for download from .

  • The DataDirect JDBC Driver requires Java SE 5 or higher. See System and Product Requirements in the DataDirect documentation for information and requirements associated with specific features of the JDBC driver.
  • The license key is embedded in the file itself. You do not need to apply a specific license key to the driver to activate it.

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Downloading the DataDirect JDBC Driver

To install the JDBC driver on your client:

  1. Log into and download the DataDirect JDBC driver file: PROGRESS_DATADIRECT_JDBC_DRIVER_PIVOTAL_GREENPLUM_5.1.4.zip.
  2. Follow the instructions in Verifying the Greenplum Database Software Download to verify the integrity of the Progress DataDirect JDBC Driver software.
  3. Extract the downloaded ZIP file.
  4. Add the full path to the PROGRESS_DATADIRECT_JDBC_DRIVER_PIVOTAL_GREENPLUM_5.1.4.jar to your Java CLASSPATH environment variable, or add it to your classpath with the -classpath option when executing a Java application.

To view the JDBC driver version information:

  1. Change to the directory that contains the downloaded PROGRESS_DATADIRECT_JDBC_DRIVER_PIVOTAL_GREENPLUM_5.1.4.jar driver file. For example:

Parent topic:DataDirect JDBC Driver for VMware Tanzu Greenplum

Usage Information

The JDBC driver is provided in the greenplum.jar file. Use the following data source class and connection URL information with the driver.

Parent topic:DataDirect JDBC Driver for VMware Tanzu Greenplum

The DataDirect JDBC driver version 5.1.4.000270 (F000450.U000214) introduced support for the PrepareThreshold connection property. This property specifies the number of prepared statement executions to be performed before the driver switches to using server-side prepared statements.

When the PrepareThreshold value is greater than 1, it specifies on which execution of a prepared statement the driver starts using server-side prepared statements.

Refer to PrepareThreshold in the DataDirect documentation for additional information about this connection property.

When the value is greater than one and the prepared statement includes parameterized operations, the driver does not send any SQL prepare calls during connection.prepareStatement(). The driver instead sends the query all at once, at execution time. This requires that the driver determine the data types of every column before it sends the query to the server. While the driver can make this determination for many data types, it cannot for the JDBC types that can be mapped to multiple Greenplum data types:

  • BIT VARYING
  • BOOLEAN
  • JSON
  • TIME WITH TIME ZONE
  • UUIDCOL

To work around this limitation, set PrepareThreshold to 0 when a prepared statement uses parameterized values with any of the above data types. And use to determine if any of the above types are used in a query in advance of submitting the prepared statement.

Note

GPORCA does not support prepared statements that have parameterized values, and will fall back to using the Postgres Planner.

Parent topic:DataDirect JDBC Driver for VMware Tanzu Greenplum

DataDirect Driver Documentation

Parent topic:DataDirect JDBC Driver for VMware Tanzu Greenplum