import type { Expression } from '../expression/expression.js';
import { AlterTableNode } from '../operation-node/alter-table-node.js';
import type { IndexType } from '../operation-node/create-index-node.js';
import type { OperationNodeSource } from '../operation-node/operation-node-source.js';
import { type OrderedColumnName } from '../parser/reference-parser.js';
import type { CompiledQuery } from '../query-compiler/compiled-query.js';
import type { QueryExecutor } from '../query-executor/query-executor.js';
import type { Compilable } from '../util/compilable.js';
import type { QueryId } from '../util/query-id.js';
export declare class AlterTableAddIndexBuilder implements OperationNodeSource, Compilable {
    #private;
    constructor(props: AlterTableAddIndexBuilderProps);
    /**
     * Makes the index unique.
     *
     * ### Examples
     *
     * ```ts
     * await db.schema
     *   .alterTable('person')
     *   .addIndex('person_first_name_index')
     *   .unique()
     *   .column('email')
     *   .execute()
     * ```
     *
     * The generated SQL (MySQL):
     *
     * ```sql
     * alter table `person` add unique index `person_first_name_index` (`email`)
     * ```
     */
    unique(): AlterTableAddIndexBuilder;
    /**
     * Adds a column to the index.
     *
     * Also see {@link columns} for adding multiple columns at once or {@link expression}
     * for specifying an arbitrary expression.
     *
     * ### Examples
     *
     * ```ts
     * await db.schema
     *   .alterTable('person')
     *   .addIndex('person_first_name_and_age_index')
     *   .column('first_name')
     *   .column('age desc')
     *   .execute()
     * ```
     *
     * The generated SQL (MySQL):
     *
     * ```sql
     * alter table `person` add index `person_first_name_and_age_index` (`first_name`, `age` desc)
     * ```
     */
    column<CL extends string>(column: OrderedColumnName<CL>): AlterTableAddIndexBuilder;
    /**
     * Specifies a list of columns for the index.
     *
     * Also see {@link column} for adding a single column or {@link expression} for
     * specifying an arbitrary expression.
     *
     * ### Examples
     *
     * ```ts
     * await db.schema
     *   .alterTable('person')
     *   .addIndex('person_first_name_and_age_index')
     *   .columns(['first_name', 'age desc'])
     *   .execute()
     * ```
     *
     * The generated SQL (MySQL):
     *
     * ```sql
     * alter table `person` add index `person_first_name_and_age_index` (`first_name`, `age` desc)
     * ```
     */
    columns<CL extends string>(columns: OrderedColumnName<CL>[]): AlterTableAddIndexBuilder;
    /**
     * Specifies an arbitrary expression for the index.
     *
     * ### Examples
     *
     * ```ts
     * import { sql } from 'kysely'
     *
     * await db.schema
     *   .alterTable('person')
     *   .addIndex('person_first_name_index')
     *   .expression(sql<boolean>`(first_name < 'Sami')`)
     *   .execute()
     * ```
     *
     * The generated SQL (MySQL):
     *
     * ```sql
     * alter table `person` add index `person_first_name_index` ((first_name < 'Sami'))
     * ```
     */
    expression(expression: Expression<any>): AlterTableAddIndexBuilder;
    /**
     * Specifies the index type.
     *
     * ### Examples
     *
     * ```ts
     * await db.schema
     *   .alterTable('person')
     *   .addIndex('person_first_name_index')
     *   .column('first_name')
     *   .using('hash')
     *   .execute()
     * ```
     *
     * The generated SQL (MySQL):
     *
     * ```sql
     * alter table `person` add index `person_first_name_index` (`first_name`) using hash
     * ```
     */
    using(indexType: IndexType): AlterTableAddIndexBuilder;
    using(indexType: string): AlterTableAddIndexBuilder;
    /**
     * Simply calls the provided function passing `this` as the only argument. `$call` returns
     * what the provided function returns.
     */
    $call<T>(func: (qb: this) => T): T;
    toOperationNode(): AlterTableNode;
    compile(): CompiledQuery;
    execute(): Promise<void>;
}
export interface AlterTableAddIndexBuilderProps {
    readonly queryId: QueryId;
    readonly executor: QueryExecutor;
    readonly node: AlterTableNode;
}