import { DefaultSchemaGrammar } from '../../schema';
/**
 * PostgreSQL schema grammar. DefaultSchemaGrammar already emits standard,
 * PostgreSQL-compatible DDL (double-quoted identifiers, SERIAL/BIGSERIAL
 * auto-increment, native INTEGER[] and JSONB, `true`/`false` booleans), so only
 * the table-exists probe needs the engine's `$n` placeholder style.
 */
export declare class PostgresSchemaGrammar extends DefaultSchemaGrammar {
    compileTableExists(table: string): {
        sql: string;
        bindings: any[];
    };
    compileColumnExists(table: string, column: string): {
        sql: string;
        bindings: any[];
    };
    /**
     * Adds the PostgreSQL `USING <method>` clause (e.g. GIN for INT[] columns)
     * when an index declares one via `table.index(...).using('gin')`. Falls back
     * to the default B-tree DDL when no method is set.
     */
    protected createIndexSql(table: string, columns: string[], name?: string, unique?: boolean, ifNotExists?: boolean, using?: string): string;
}