Teradata

Teradata is a relational database management system.

watsonx.data on IBM Software Hub

watsonx.data Developer edition

Teradata

Configure the following details for Teradata:

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.
Authentication type Choose and enter the Authentication type details:
  • TD2: Enter the username and password.
  • LDAP: Enter the username and password.
Port is SSL enabled Use the toggle switch to enable or disable SSL connection. 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.

Connection status Click the Test connection link to test the database connection. If the database connection is successful, a success message appears.

Console UI

Associate catalog

Console UI

Select the checkbox to associate a catalog to the data source. This catalog is automatically associated with your data source and serves as your query interface with the data stored within.
Catalog name / Name

  • Console UI

    Catalog name: Enter the name of the catalog.

  • Platform UI

    Name: Enter the name of the database associated with your data source. The database serves as your query interface with the data stored within.
Create Click Create to create the database.

Limitations for SQL statements

  • ALTER TABLE does not drop the first column for DROP COLUMN statement.
  • DROP TABLE statement is supported only when enabled in the catalog.
  • For the database-based catalogs, 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

  • BLOB and CLOB data types support only CREATE and SELECT statements.
  • The data that is shown for the BLOB data type from the UI is in Base64 format, while the result from presto-cli is in hexadecimal format.
  • BINARY data type supports only SELECT statement.
  • VARBYTE is the BINARY alternative data type.
  • 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.