import { type FoldRule, type IdentKind } from "../ident/fold.js";
import type { QualifiedNameConfig } from "../ir/qualified-name.js";
export declare const POSTGRES_FOLD_RULE: FoldRule;
/** database.schema.table (postgresql.org/docs/18/sql-syntax-lexical + ddl-schemas — cross-
 *  database references are rejected at runtime but the three-part form parses). Normalized
 *  vocabulary: catalog = database. */
export declare const POSTGRES_NAME_CONFIG: QualifiedNameConfig;
/** Fold an identifier to its PostgreSQL identity key. */
export declare function fold(raw: string, kind?: IdentKind): string;
/** Presentation twin: strip delimiters, no case change. */
export declare function displayName(raw: string): string;
export declare function foldTableName(parts: string[]): string[];
export declare function matchesSourceKey(key: string, rawPart: string): boolean;