import { ParserRuleContext } from "antlr4ng";
import type { QueryExpr } from "../ir/ir.js";
import { type StatementCategory } from "../ir/statement.js";
/** Lower a parsed PostgreSQL file (root: stmtblock of `;`-separated statements) into the IR.
 *  A single SELECT statement lowers fully; anything else (DDL, DML, multi-statement batches)
 *  becomes a flagged non-query body — a valid parse never throws. Frozen — immutable after lower(). */
export declare function lower(tree: ParserRuleContext): QueryExpr;
/** Per-statement categories for every top-level `stmt` in a parsed `root`, in source order — the
 *  file-level view behind statementCategory (which folds >1 into "compound"). Parity with the other
 *  dialects; feeds the corpus reclassifier. */
export declare function statementCategories(tree: ParserRuleContext): StatementCategory[];