import type { KNEX_TYPES } from '@directus/constants';
import type { Column } from '@directus/schema';
import type { Field, RawField, Relation, Type } from '@directus/types';
import type { Knex } from 'knex';
import type { CreateIndexOptions, Options, SortRecord, Sql } from '../types.js';
import { SchemaHelper } from '../types.js';
export declare class SchemaHelperOracle extends SchemaHelper {
    generateIndexName(type: 'unique' | 'foreign' | 'index', collection: string, fields: string | string[]): string;
    changeToType(table: string, column: string, type: (typeof KNEX_TYPES)[number], options?: Options): Promise<void>;
    castA2oPrimaryKey(): string;
    preRelationChange(relation: Partial<Relation>): void;
    processFieldType(field: Field): Type;
    getDatabaseSize(): Promise<number | null>;
    /**
     * Oracle throws an error when overwriting the nullable option for an existing column with the same value.
     */
    setNullable(column: Knex.ColumnBuilder, field: RawField | Field, existing: Column | null): void;
    prepQueryParams(queryParams: Sql): Sql;
    prepBindings(bindings: Knex.Value[]): any;
    addInnerSortFieldsToGroupBy(groupByFields: (string | Knex.Raw)[], sortRecords: SortRecord[], _hasRelationalSort: boolean): void;
    getColumnNameMaxLength(): number;
    getTableNameMaxLength(): number;
    createIndex(collection: string, field: string, options?: CreateIndexOptions): Promise<Knex.SchemaBuilder>;
}