Indexes work best for improving SELECT queries using the Query Runner on larger tables, but can otherwise slow down UPDATE, INSERT, or DELETE queries when using ExecuteRDB SQL from an Activity. For more information about Query Runner and ExecuteRDB SQL API, see Running SQL Queries on Pega Cloud and Database management through SQL.

Adding or deleting an index can take time to complete. After initiating an operation, you can view progress and verify completion by refreshing the landing page and clicking the History tab for the table containing the index.

1. In the header of Dev Studio, click ConfigureSystemDatabaseSchema Tools.
2. Select the table for the index to view the list of existing indexes.
   • To add an index:
     1. Click Add index.
     2. Enter a name for the index.
     3. Enter a list of one or more columns or functions, in order, for the index.
     4. Click Create index.
   • To delete an index:
     1. Select the index that you want to delete.
     2. Click Delete.