import type { ArrayLiteralNode, RecordLiteralNode, RegexMatchExpr, TimeExtractExpr, TimeLiteralNode, TimeTruncExpr, TypecastExpr } from '../model/malloy_types';
import type { QueryInfo } from './dialect';
import { Dialect } from './dialect';
export declare const timeExtractMap: Record<string, string>;
/**
 * Many SQL implementations started with the PostGres source, and therefore can use the
 * same implementations for the much of the SQL code generation
 */
export declare abstract class PostgresBase extends Dialect {
    sqlTruncExpr(qi: QueryInfo, df: TimeTruncExpr): string;
    sqlNowExpr(): string;
    sqlTimeExtractExpr(qi: QueryInfo, from: TimeExtractExpr): string;
    sqlCast(qi: QueryInfo, cast: TypecastExpr): string;
    sqlRegexpMatch(df: RegexMatchExpr): string;
    sqlLiteralTime(qi: QueryInfo, lt: TimeLiteralNode): string;
    sqlLiteralRecord(_lit: RecordLiteralNode): string;
    sqlLiteralArray(lit: ArrayLiteralNode): string;
    sqlMaybeQuoteIdentifier(identifier: string): string;
}