Create Credentials and Copy Data into an Existing Table

For data loading from files in the Cloud, you need to first store your object storage credentials in your Autonomous Data Warehouse and then use the procedure DBMS_CLOUD.COPY_DATA to load data.

The source file in this example, channels.txt, has the following data:

S,Direct Sales,Direct
T,Tele Sales,Direct
C,Catalog,Indirect
I,Internet,Indirect
P,Partners,Others
  1. Store your object store credentials using the procedure DBMS_CLOUD.CREATE_CREDENTIAL. For example:
    SET DEFINE OFF
    BEGIN
      DBMS_CLOUD.CREATE_CREDENTIAL(
        credential_name => 'DEF_CRED_NAME',
        username => 'adwc_user@example.com',
        password => 'password'
      );
    END;
    /

    This operation stores the credentials in the database in an encrypted format. You can use any name for the credential name. Note that this step is required only once unless your object store credentials change. Once you store the credentials you can then use the same credential name for all data loads.

    For complete details and an example using Oracle Cloud Infrastructure Object Storage credentials, see Loading Your Data Into Autonomous Data Warehouse.

    For detailed information about the parameters, see CREATE_CREDENTIAL Procedure.

    Note:

    Some tools like SQL*Plus and SQL Developer use the ampersand character (&) as a special character. If you have the ampersand character in your password use the SET DEFINE OFF command in those tools as shown in the example to disable the special character and get the credential created properly.
  2. Load data into an existing table using the procedure DBMS_CLOUD.COPY_DATA. For example:
    CREATE TABLE CHANNELS
       (channel_id CHAR(1),
        channel_desc VARCHAR2(20),
        channel_class VARCHAR2(20)
       );
    /
    
    BEGIN
     DBMS_CLOUD.COPY_DATA(
        table_name =>'CHANNELS',
        credential_name =>'DEF_CRED_NAME',
        file_uri_list =>'https://objectstorage.us-phoenix-1.oraclecloud.com/n/namespace-string/b/bucketname/o/channels.txt',
        format => json_object('delimiter' value ',')
     );
    END;
    /
    

    The parameters are:

    • table_name: is the target table‚Äôs name.

    • credential_name: is the name of the credential created in the previous step.

    • file_uri_list: is a comma delimited list of the source files you want to load.

    • format: defines the options you can specify to describe the format of the source file, including whether the file is of type text, Parquet, or Avro.

    In this example, namespace-string is the Oracle Cloud Infrastructure object storage namespace and bucketname is the bucket name. See Understanding Object Storage Namespaces for more information.

    Note:

    Autonomous Database supports a variety of source file formats, including compressed data formats. See DBMS_CLOUD Package Format Options and the DBMS_CLOUD compression format option to see the supported compression types.

    For detailed information about the parameters, see COPY_DATA Procedure and COPY_DATA Procedure for Parquet or Avro Files.