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Greenplum

Greenplum

Greenplum is a massively parallel processing (MPP) SQL database. It provides access to data in powerful server clusters within a single SQL interface.

Configure the following details for Greenplum data source:

Register data source
Field Description
Display name Enter the database name to be displayed on the screen.
Database name Enter the name of your database.
Hostname Enter the hostname.
Port Enter the port number.
Username Enter the username.
Password Enter the password.
Port is SSL enabled Use the toggle switch to enable or disable SSL connection.
Connection details: Arrow Flight

Enter the following details for Arrow Flight service connection:
Service hostname: Enter the service hostname from the following options:

  • api.dataplatform.cloud.ibm.com
  • api.eu-gb.dataplatform.cloud.ibm.com
  • api.eu-de.dataplatform.cloud.ibm.com
  • api.jp-tok.dataplatform.cloud.ibm.com.
    Port: Enter the port number.
    API key: Enter the API key. For more information, see API key.
    Token URL: Enter the token URL as https://iam.cloud.ibm.com/identity/token.
    Port is SSL enabled: Use the toggle switch to enable or disable SSL connection.
    Validate server certificate: This option can be used when the host certificate is not signed by a known certificate authority. Toggle the switch to enable or disable the server certificate validation. If enabled,
    i. The Upload SSL certificate (.pem, .crt, .cert or .cer) link is enabled.
    ii. Click the Upload SSL certificate (.pem, .crt, .cert or .cer) link.
    iii. Browse the SSL certificate and upload.
Test connection Click the Test connection link to test the data source connection. If the data source connection is successful, a success message appears.
Catalog name Enter the name of the catalog. This catalog is automatically associated with your database.
Create Click Create to create the database.

Limitations for SQL statements

  • For database-based catalogs the CREATE SCHEMA, CREATE TABLE, DROP SCHEMA, DROP TABLE, DELETE, DROP VIEW, ALTER TABLE, and ALTER SCHEMA statements are not available in the Data Manager UI.

Limitations for data types

  • When the fields of data type REAL have 6 digits or more in the decimal part with the digits being predominately zero, the values when queried are rounded off. It is observed that the rounding off occurs differently based on the precision of the values. For example, a decimal number 1.654 when rounded to 3-digits after the decimal point are the same. Another example is 10.890009 and 10.89000. It is noticed that 10.89000 is rounded to 10.89, whereas 10.89009 is not rounded off. This is an inherent issue because of the representational limitations of binary floating point formats. This might have a significant impact when querying involves sorting.