Drop Predicate Index

Removes an existing predicate index from a store. This operation cleans up indexes that are no longer needed for query acceleration.

Source Code Example

Click to expand

use ahnlich_client_rs::db::DbClient;
use ahnlich_types::db::query::DropPredIndex;
use tokio;


#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let addr = "http://127.0.0.1:1369";
    let client = DbClient::new(addr.to_string()).await?;


    // Drop the "role" predicate index from store "Main"
    let drop_index_params = DropPredIndex {
        store: "Main".to_string(),
        predicates: vec!["role".to_string()],
        error_if_not_exists: true, // fail if it doesn't exist
    };


    match client.drop_pred_index(drop_index_params, None).await {
        Ok(result) => println!("Dropped predicate index: {:?}", result),
        Err(e) => eprintln!("Error: {:?}", e),
    }


    Ok(())
}

Parameters

• params: DropPredIndex — Identifies the store and the predicate index to remove.

Returns

• Del — Confirmation of index removal.

• AhnlichError — If the store or index does not exist.

Behavior

• Builds a gRPC request with the target index details.

• Attaches optional trace metadata.

• Executes the drop_pred_index RPC to delete the index.