Oracle

Oracle allows querying and creating tables in an external Oracle database. You can add an Oracle data source as an infrastructure component.

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watsonx.data Developer edition

Oracle

You can add Oracle as a data source infrastructure component in the following ways:

Configure a new connection. See Create new connection - configuration details.
Import an existing connection from a project or catalog/database that is on the same cluster. See Importing an existing connection.

Create new connection - configuration details

Table 1. Create new connection - configuration details
Field	Description
Target persistence	Select the target persistence: watsonx.data instance - The instance console database stores the connection details exclusively. Platform asset catalog - The default catalog in the data platform stores your connection details. If you select Platform asset catalog as the target persistence, you must specify a warehouse name. You can select the Platform asset catalog option only if data platform services are active, a Platform asset catalog exists in the data platform, and you have access to it.
Display name	The name of the new infrastructure component.
Hostname	Enter the Hostname.
Port	Enter the Port number.
Username	Enter the Username.
Password	Enter the Password.
Connection mode	Select the Connection mode as either Service name or SID.
Connection mode value	Enter the Connection mode value.
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 add a catalog for your storage. This catalog is associated with your storage 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 data source.

Importing an existing connection

Table 2. Importing an existing connection
Field	Description
Select the location of the existing connection	Select from where to import the connection: Select a project on the Import from project tab. Console UI Select the connection on the Import from platform catalog tab. Platform UI Select the connection on the Import from database tab. Important: Connections can only be imported from catalogs, databases, or projects that are on the same cluster. Catalogs, databases, or projects created in a different cluster within the data platform cannot be imported.
Select data source	Use the dropdown to select a data source from the selected catalog, database, or project.
Target persistence	Select the target persistence: watsonx.data instance - The instance console database stores the connection details exclusively. Platform asset catalog - The default catalog in the data platform stores your connection details. If you select Platform asset catalog as the target persistence, you must specify a warehouse name. You can select the Platform asset catalog option only if data platform services are active, a Platform asset catalog exists in the data platform, and you have access to it.
Display name	The name of the new infrastructure component.
Console UI Associate catalog	Console UI Select the checkbox to add a catalog for your storage. This catalog is associated with your storage 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

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

BINARY, BLOB, and CLOB data types support only SELECT statement.
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.