import { Blueprint } from './Blueprint';
import { SchemaExpression } from './ColumnDefinition';
import { SchemaBuilder } from './SchemaBuilder';
/**
 * Static, database-agnostic schema facade — the neorm equivalent of Laravel's
 * `Schema`. It mirrors the same fluent Blueprint API and dispatches to the
 * active DataSource, so the very same migration runs on PostgreSQL, MySQL and
 * SQLite:
 *
 *   Schema.create('oauth_access_tokens', (table) => {
 *     table.string('id', 100).primary()
 *     table.unsignedBigInteger('userId').index()
 *     table.integer('clientId')
 *     table.text('scopes').nullable()
 *     table.boolean('revoked').default(false)
 *     table.dateTime('expiresAt').nullable()
 *   })
 *
 *   Schema.table('oauth_access_tokens', (table) => {
 *     table.foreign('userId').references('id').on('users').onDelete('cascade')
 *     table.dropColumn('scopes')
 *     table.float('weight')
 *   })
 *
 *   Schema.drop('legacy_table')
 *   Schema.dropIfExists('temp_table')
 */
export declare abstract class Schema {
    /** Targets a specific registered source instead of the active one. */
    static connection(sourceName: string): SchemaBuilder;
    static create(table: string, callback: (table: Blueprint) => void): Promise<void>;
    static createIfNotExists(table: string, callback: (table: Blueprint) => void): Promise<void>;
    static table(table: string, callback: (table: Blueprint) => void): Promise<void>;
    static drop(table: string): Promise<void>;
    static dropIfExists(table: string): Promise<void>;
    static rename(from: string, to: string): Promise<void>;
    static hasTable(table: string): Promise<boolean>;
    static hasColumn(table: string, column: string): Promise<boolean>;
    /** Wraps a raw SQL fragment for use as a column default. */
    static raw(sql: string): SchemaExpression;
    private static builder;
}