Greenplum as Target

Fivetran HVR supports integrating changes into Greenplum location. This section describes the configuration requirements for integrating changes using Integrate and Refresh into Greenplum location. For the list of supported Greenplum versions into which HVR can integrate changes, see Integrate changes into location in Capabilities.

• HVR uses the DataDirect Connect XE ODBC driver to write data into Greenplum during Continuous Integrate and Row-wise Refresh.
• By default, HVR writes data into Greenplum using Burst Integrate and Bulk Refresh as they provide better performance. However, it is required to create staging files on a temporary location to perform Burst Integrate and Bulk Refresh. For more information about staging, see section Staging for Greenplum.

Grants for Integrate, Refresh, and Compare

This section lists the grants required for comparing or integrating (Integrate and Refresh) changes into Greenplum.

• The HVR database User must be granted the following privileges:

  grant connect, create on database dbname to username;
  
  grant select, insert, update, delete on table replicated_table_name to username;
  

• The HVR database User must be granted the following privilege to change tables which are in another schema (using action TableProperties with parameter Schema):

  grant usage on myschema to username;
  

• The HVR database User must be granted the following privilege when Refresh is used to create the target tables:

  grant create on myschema to username;
  

Intermediate Directory

This option in the HVR UI allows you to specify a directory path for storing intermediate (temporary) files generated during Compare. These files are created during both "direct file compare" and "online compare" operations.

This option is displayed in the location creation dialog when creating a new location, and in the Source and Target Properties pane on the Location Details page when editing an existing location.

Using an intermediate directory can enhance performance by ensuring that temporary files are stored in a location optimized for the system's data processing needs.

This setting is particularly relevant for target file locations, as it determines where the intermediate files are placed during the Compare operation. If this option is not enabled, the intermediate files are stored by default in the integratedir/_hvr_intermediate directory, where integratedir is the replication DIRECTORY (File_Path) defined for the target file location.

Intermediate Directory is Local

This option indicates that the Intermediate Directory will be created on the local drive of the location's server. This option is displayed when you select the Intermediate Directory option in the HVR UI. It is selected by default and cannot be modified.

Storing intermediate files locally is crucial for optimizing performance by reducing network latency and avoiding potential permission issues associated with remote storage. It enables HVR to process data more efficiently by leveraging the speed and reliability of local storage. This is particularly beneficial when the HVR Agent has access to ample local storage, allowing it to handle large data volumes without relying on networked storage solutions.