block_encryption_mode

Description

block_encryption_mode specifies the encryption algorithm used in the aes_encrypt and aes_decrypt functions.

Privilege requirements

• Query variables

  • Global level

    sys tenant and all user tenants can use the SHOW VARIABLES statement or the SYS.TENANT_VIRTUAL_GLOBAL_VARIABLE view (Oracle-compatible mode) and the information_schema.GLOBAL_VARIABLES view (MySQL-compatible mode) to view the value of global system variables.

  • Session level

    sys tenant and all user tenants can use the SHOW VARIABLES statement or the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (Oracle-compatible mode) and the information_schema.SESSION_VARIABLES view (MySQL-compatible mode) to view the value of session system variables.

• Modify variables

  • Global level

    • sys tenant can directly modify the value of global system variables.

    • MySQL user tenants need to have the SUPER or ALTER SYSTEM privilege to modify the value of global system variables.

    • Oracle user tenants need to have the ALTER SYSTEM privilege to modify the value of global system variables.

  • Session level

    sys tenant and all user tenants can directly modify the value of session system variables.

Attributes

Examples

Set the encryption algorithm used in the aes_encrypt and aes_decrypt functions to aes-128-ecb.

• Global level

  obclient> SET GLOBAL block_encryption_mode='aes-128-ecb';
  

• Session level

  obclient> SET block_encryption_mode='aes-128-ecb';