# Oracle and the data.world Collector

## Introduction

### Note

The latest version of the Collector is 2.128. To view the release notes for this version and all previous versions, please go here.

## Oracle version supported

• Oracle database 12.1.0.1 JDBC driver version available here.

## Permissions required to catalog Oracle

CREATE USER ddw_user IDENTIFIED BY <pass>
GRANT create session, SELECT_CATALOG_ROLE TO ddw_user;

--- This statement will be repeated for each table you want to collect metadata from\
GRANT SELECT ON "<schema>"."<table_name>" TO ddw_user;

## What is cataloged

The information cataloged by the collector includes:

## Setting up pre-requisites for running the collector

Make sure that the machine from where you are running the collector meets the following hardware and software requirements.

Table 1.

Item

Requirement

Hardware

RAM

8 GB

CPU

2 Ghz processor

Software

Docker

Java Runtime Environment

OpenJDK 17 is supported and available here.

JDBC Driver

Oracle database 12.1.0.1 JDBC driver available here. The computer should have the appropriate JDBC driver on its file system.

data.world specific objects

Dataset

You must have a ddw-catalogs (or other) dataset set up to hold your catalog files when you are done running the collector.

## Generating the command or YAML file

This section walks you through the process of generating the command or YAML file for running the collector from Windows or Linux or MAC OS.

1. On the Organization profile page, go to the Settings tab > Metadata collectors section.

2. Click the Help me set up a collector button.

3. On the On-prem collector setup prerequisites screen, read the pre-requisites and click Next.

4. On the On which platform will this collector execute? screen, select if you will be running the collector on Windows or Mac OS or Linux. This will determine the format of the YAML and CLI command that is generated in the end. Click Next.

5. On the Choose metadata collector type you would like to setup screen, select Oracle. Click Next.

6. On the Oracle Collector requires an additional driver file screen, set the following:

Table 2.

Field name

Corresponding parameter name

Description

Required?

JDBC driver directory

source=${HOME}/dwcc-drivers The driver required to run the collector. You must download this driver yourself and place it in a directory on the machine that will run the collector. Yes 7. On the Configure a new on premises Oracle Collector screen, set the following properties and click Next. Table 3. Field name Corresponding parameter name Description Required? data.world API token -t=<apiToken> --api-token=<apiToken> The data.world API token to use for authentication. Default is to use an environment variable named${DW_AUTH_TOKEN}.

Yes

Output Directory

-o=<outputDir>

--output=<outputDir>

The output directory into which any catalog files should be written.

Yes

Collection Name

-n=<catalogName>

-n=<catalogName>

The name of the collection where the collector output will be stored.

Yes

The dataset to which the catalog is to be uploaded, specified as a simple dataset name to upload to that dataset within the organization's account, or [account/dataset] to upload to a dataset in some other account (ignored if --upload not specified)

Yes

data.world API host

-H=<apiHost>

--api-host=<apiHost>

The host for the data.world API. NOTE: This parameter is required for Private instances and single-tenant installations. For example, "api.8bank.data.world" where "8bank" is the name of the single-tenant or private install.

Yes

(for single-tenant installations)

8. On the next screen, set the following properties and click Next.

Table 4.

Field name

Corresponding parameter name

Description

Required

Server

-s=<server>

--server=<server>

The hostname of the database server to connect to.

Yes

Server port

-p=<port>

--port=<port>

The port of the database server (if not the default).

No

Database

-d=<database>

--database=<database>

The name of the database to connect to.

Yes

Database Id

-D=<databaseid>

--database-id=<databaseId>

A unique identifier for this database - will be used to generate the ID for the database (this is optional, you only need to provide this if the database name used for the connection is not sufficiently unique to completely identify the database)

No

-u=<user>

--user=<user>

The username to use to make the JDBC connection.

Yes

Specify this option to provide the password for the database on the command line.

Yes

Server Environment

-e=<environment>

--environment=<environment>

If your provided server name is localhost, use this to give a friendly name to the environment in which your database server runs to help differentiate it from other environments.

No

Schemas to collect

Select from one of the following options: Collect all schema, Specify which schema to collect

Yes

Collect all schema

-A

--all-schemas

Catalog all schemas to which the user has access.

Yes (if --schema is not set)

Specify which schema to collect

-S=<databaseSchema>

--schema=<databaseSchema>

The name of the database schema to catalog.

Yes (if --all-schema is not set)

9. On the next screen, set the following optional properties and click Next.

Table 5.

Field name

Corresponding parameter name

Description

Required?

Database is an Oracle SID

--oracle-sid-mode

Indicates that the database is actually an Oracle SID.

No

JDBC Properties

--jdbc-property=<driverProperties>

JDBC driver properties to pass through to driver connection, as name=value. Separate the name=value pairs with a semicolon (;). For example, property1=value1;property2=value2

No

10. On the Finalize your Oracle Collector configuration screen, you are notified about the environment variables and directories you need to setup for running the collector. Select if you want to generate a Configuration file (YAML) or Command line arguments (CLI). Click Next

### Important

You must ensure that you have set up these environment variables and directories before you run the collector.

11. The next screen gives you an option to download the YAML configuration file or copy the CLI command. Click Done. If you are generated a YAML file, click Next.

Sample YAML file:

12. The Oracle command screen gives you the command to use for running the collector using the YAML file.

13. You will notice that the YAML/CLI has following additional parameters that are automatically set for you.

Table 6.

Parameter name

Details

Required?

--b=<base>

--base=<base>

The base URI to use as the namespace for any URIs generated.

(Must use this OR --agent)

Yes

(If agent is not provided)

-a=<agent>

--agent=<agent>

--account=<agent>

The CLI and YAML file incudes the base parameter. If you want, you can instead use the agent parameter.

The ID for the data.world account into which you will load this catalog - this is used to generate the namespace for any URIs generated.

(Must include either --agent or --base)

Yes

(if base parameter is not provided)

--site=<site>

This parameter should be set only for Private instances. Do not set it for public instances and single-tenant installations. Required for private instance installations.

Yes

(required for private instance installations)

-L

Do not upload the log of the Collector run to the organization account's catalogs dataset or to another location specified with --upload-location(ignored if --upload not specified)

Yes

dwcc:<CollectorVersion>

The version of the collector you want to use (For example, datadotworld/dwcc:2.113)

Yes

• --dry-run If specified, the collector does not actually harvest any metadata, but just checks the database connection parameters provided by the user and reports success or failure at connecting.

15. Add the following parameter if you are using a sparql query to execute to transform the catalog graph emitted by the collector.

• -z=<postProcessSparql>--post-process-sparql=<postProcessSparql> : A file containing a SPARQL query to execute to transform the catalog graph emitted by the collector.

## Verifying environment variables and directories

1. Verify that you have set up all the required environment variables that were identified by the Collector Wizard before running the collector. Alternatively, you can set these credentials in a credential vault and use a script to retrieve those credentials.

2. Verify that you have set up all the required directories that were identified by the Collector Wizard.

## Running the collector

### Important

Before you begin running the collector make sure you have the correct version of collectors downloaded and available.

### Running collector using YAML file

1. Go to the server where you have setup docker to run the collector.

2. Make sure you have download the correct version of collectors. This version should match the version of the collector specified in the YAML/CLI generated from the collector wizard.

3. Place the YAML file generated from the Collector wizard to the correct directory.

4. From the command line, run the command generated from the application for executing the YAML file.

### Caution

Note that is just a sample command for showing the syntax. You must generate the command specific to your setup from the application UI.

docker run -it --rm --mount type=bind,source=${HOME}/dwcc,target=/dwcc-output \ --mount type=bind,source=${HOME}/dwcc,target=${HOME}/dwcc --mount type=bind,source=${HOME}/dwcc-drivers,target=/usr/src/dwcc-config/lib \
-e DW_AUTH_TOKEN=${DW_AUTH_TOKEN} -e DW_ORACLE_PASSWORD=${DW_ORACLE_PASSWORD} \
datadotworld/dwcc:2.124 --config-file=/dwcc-output/config-oracle.yml
5. The collector automatically uploads the file to the specified dataset and you can also find the output at the location you specified while running the collector.

6. At a later point, if you download a newer version of collector from docker, you can edit the collector version in the generated command to run the collector with the newer version.

### Running collector without the YAML file

1. Go to the server where you have setup docker to run the collector.

2. Make sure you have download the version of collectors from here.

3. From the command line, run the command generated from the application. Here is a sample command.

### Caution

Note that is just a sample command for showing the syntax. You must generate the command specific to your setup from the application UI.

docker run -it --rm --mount type=bind,source=${HOME}/dwcc,target=/dwcc-output \ --mount type=bind,source=${HOME}/dwcc,target=${HOME}/dwcc --mount type=bind,source=${HOME}/dwcc-drivers,target=/usr/src/dwcc-config/lib \
--site=solutions --no-log-upload=false --upload=true --api-token=${DW_AUTH_TOKEN} \ --output=/dwcc-output --name=8bank-catalog-config-collection --upload-location=ddw-catalogs \ --server=Oracle_server --database=my_oracle_db --user=my_user --password=${DW_ORACLE_PASSWORD} \
--all-schemas=true --oracle-sid-mode=false
4. The collector automatically uploads the file to the specified dataset and you can also find the output at the location you specified while running the collector.

5. At a later point, if you download a newer version of collector from docker, you can edit the collector version in the generated command to run the collector with the newer version.

## Handling custom certificates

If the target data instance has a custom SSL certificate, we recommend extending our Docker image and installing the custom cert like this (where ./ca.der is the name and location of the cert file).

Dockerfile:

FROM datadotworld/dwcc:<collector_version>
RUN keytool -importcert -alias startssl -cacerts -storepass changeit -noprompt -file ca.der

### Important

Do not forget to replace <collector_version> in datadotworld/dwcc:<collector_version> with the version of the Collector you want to use (for example, datadotworld/dwcc:2.126).

Then, in the directory with that Dockerfile:

docker build -t dwcc-cert .

### Note

The command needs to be all lower case, and there must be a dot (.) supplied to reference the current directory.

Finally, change the docker run command to use dwcc-cert instead of dwcc. Here is an example command for cataloging Tableau with a custom SSL certificate:

docker run -it --rm --mount type=bind,source=/tmp,target=/dwcc-output \
--mount type=bind,source=/tmp,target=/app/log dwcc-cert \
catalog-tableau --tableau-api-base-url <baseUrl> \
-a <account> -n <catalogName> -o "/dwcc-output"

### Collector runtime and troubleshooting

The catalog collector may run in several seconds to many minutes depending on the size and complexity of the system being crawled. If the catalog collector runs without issues, you should see no output on the terminal, but a new file that matching *.dwec.ttl should be in the directory you specified for the output. If there was an issue connecting or running the catalog collector, there will be either a stack trace or a *.log file. Both of those can be sent to support to investigate if the errors are not clear. A list of common issues and problems encountered when running the collectors is available here.