> ## Documentation Index
> Fetch the complete documentation index at: https://docs.flexagon.com/llms.txt
> Use this file to discover all available pages before exploring further.

# dropUnusedColumns

> Drops columns that have been marked unused. Target Properties Property Name Property Code Required Description Oracle Database URL FDORA URL Yes The J

Drops columns that have been marked unused.

# Target Properties

<table><colgroup><col /><col /><col /><col /></colgroup><tbody><tr><th>**Property Name**</th><th>**Property Code**</th><th>**Required**</th><th>**Description**</th></tr><tr><td>Oracle Database URL</td><td>`FDORA_URL`</td><td>Yes</td><td>The JDBC URL for the target Oracle database.This should be a complete JDBC URL (e.g. `jdbc:oracle:thin:@localhost:1521:xe`)\
Connecting to Oracle Autonomous DatabaseYou will need client credential zip file (wallet) to connect with Oracle Autonomous Database on Oracle cloud. You can download wallet zip file from Oracle Cloud, you will need admin userid and password to perform this download. See [Download Client Credentials (Wallets)](https://docs.oracle.com/en-us/iaas/autonomous-database/doc/download-client-credentials.html) for more details on how to download wallet file.<ul><li>**Since FlexDeploy 9.0.0.9 with Oracle Wallet Credential Type :** Instead of maintaining the wallet zip file under the file system, you can now store the wallet zip as an Oracle Credential Type in FlexDeploy. This allows for secure storage and use of the wallet.<ul><li>Use the URL syntax in the following format: `jdbc:oracle:thin:@service_low?TNS_ADMIN={{FDORACLE_WALLET_FILE}}` is replaced with the temporary wallet folder path during execution. Once execution is completed, the temporary file is cleaned up automatically.</li></ul></li><li>**Before FlexDeploy 9.0.0.9**<ul><li>You must make sure that only authorized users have access to these wallet files. Unzip the client credentials zip file (**wallet\_*****databasename*****.zip**) on FlexDeploy server and/or endpoint where it will be used. For example, /home/flexdeploy/.wallets/\<**wallet\_*****databasename***> is folder where specific wallet file was unzipped. Make sure to secure this folder to FlexDeploy and/or Endpoint user, so that it is not readable by all users.</li><li>We recommend using Oracle Wallet Credential Type for better security and easier management of Wallet usage.</li><li>**Database URL Syntax **: jdbc:oracle:thin:@service\_high?TNS\_ADMIN=/home/flexdeploy/.wallets/\<**wallet\_*****databasename***><ul><li>service\_high is one of the entries in the tnsnames.ora file where client credentials zip file was unzipped. See [Predefined Database Service Names for Autonomous Database](https://docs.oracle.com/en/cloud/paas/autonomous-database/serverless/adbsb/connect-predefined-generic.html) for details on services.</li><li>TNS\_ADMIN value in URL points to the location of the **unzipped client credentials zip file**.</li></ul></li><li>**Database URL Long Connection String Format Syntax **: `jdbc:oracle:thin:@(description= (retry_count=20)(retry_delay=3)(address=(protocol=tcps)(port=1522)(host=<hostname>))(connect_data=(service_name=<serice_name>))(security=(ssl_server_cert_dn="CN=<hostname>,OU=Oracle BMCS US,O=Oracle Corporation,L=Redwood City,ST=California,C=US")))`<ul><li>Examples for the same can be found [here](https://www.oracle.com/database/technologies/java-connectivity-to-atp.html).</li></ul></li></ul></li></ul>If using the Oracle Database Plugin with ADW or ATP databases , use the \_low connection. The \_medium and \_high connections can sometimes throw error** ORA-12839: cannot modify an object in parallel after modifying it.**</td></tr><tr><td>Oracle Wallet File</td><td>`FDORACLE_WALLET_FILE`</td><td>No</td><td>**Since 9.0.0.9** - Provide the Oracle Wallet file, see[Credential Type - Oracle Wallet](https://docs.flexagon.com/flexdeploy-11-0-documentation/flexdeploy-users-guide/administration/credentials/credential-types/credential-type-oracle-wallet.md) for more details.</td></tr><tr><td>Oracle Database User</td><td>`FDORA_USER`</td><td>Yes</td><td>The username that will be used to connect to the target Oracle Database.NOTE\*\*\* If the project property FDORA\_SCHEMA\_NAME is not set, then this becomesthe schema.</td></tr><tr><td>Oracle Database Password</td><td>`FDORA_PASSWORD`</td><td>Yes</td><td>The password for Oracle Database User.</td></tr><tr><td>Target JDBC Driver Path.</td><td>`FDORA_DRIVER_PATH`</td><td>Yes</td><td>Path containing JDBC driver for target database connection.</td></tr></tbody></table>

# Project Properties

<table><colgroup><col /><col /><col /><col /></colgroup><tbody><tr><th>**Property Name**</th><th>**Property Code**</th><th>**Required**</th><th>**Description**</th></tr><tr><td>Oracle Database Schema Name(s)</td><td>`FDORA_SCHEMA_NAME`</td><td>Yes</td><td>Comma-separated list of schemas controlled by this project.Leave this parameter blank if you want to have schema name different across environments.\
The plugin will then use the FDORA\_USER Target parameter as the schema name.</td></tr></tbody></table>

# Outputs

<table><colgroup><col /><col /><col /></colgroup><tbody><tr><th>**Output Name**</th><th>**Required**</th><th>**Description**</th></tr><tr><td>`FDORA_OUT_PRE_UNUSED_CNT`</td><td>No</td><td>\
</td></tr><tr><td>`FDORA_OUT_DROP_UNUSED_COUNT`</td><td>No</td><td>\
</td></tr></tbody></table>

# Artifacts

This operation doesn’t consume or produce any artifacts.  

# Endpoint Selection

This operation will select all available endpoints associated to the Target.  

# Endpoint Execution

This operation will execute on any one of the selected endpoints and will be random in the determination of which one.