import { DynamoDBClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes } from "../DynamoDBClient";
import { DeleteItemInput, DeleteItemOutput } from "../models/models_0";
import { Command as $Command } from "@aws-sdk/smithy-client";
import { Handler, MiddlewareStack, HttpHandlerOptions as __HttpHandlerOptions, MetadataBearer as __MetadataBearer } from "@aws-sdk/types";
export declare type DeleteItemCommandInput = DeleteItemInput;
export declare type DeleteItemCommandOutput = DeleteItemOutput & __MetadataBearer;
/**
 * <p>Deletes a single item in a table by primary key. You can perform a conditional delete operation that deletes the item if it exists, or if it has an expected attribute value.</p>
 *          <p>In addition to deleting an item, you can also return the item's attribute values in the same
 *       operation, using the <code>ReturnValues</code> parameter.</p>
 *          <p>Unless you specify conditions, the <code>DeleteItem</code> is an idempotent operation; running it
 *       multiple times on the same item or attribute does <i>not</i> result in an error response.</p>
 *          <p>Conditional deletes are useful for deleting items only if specific conditions are met. If those conditions are met, DynamoDB performs the delete. Otherwise, the item is not deleted.</p>
 */
export declare class DeleteItemCommand extends $Command<DeleteItemCommandInput, DeleteItemCommandOutput, DynamoDBClientResolvedConfig> {
    readonly input: DeleteItemCommandInput;
    constructor(input: DeleteItemCommandInput);
    /**
     * @internal
     */
    resolveMiddleware(clientStack: MiddlewareStack<ServiceInputTypes, ServiceOutputTypes>, configuration: DynamoDBClientResolvedConfig, options?: __HttpHandlerOptions): Handler<DeleteItemCommandInput, DeleteItemCommandOutput>;
    private serialize;
    private deserialize;
}