import type { AgentSqlToken } from "./lexer.js";
/**
 * Splits tokens into statements on `;`. A trailing `;` does not start a new
 * statement, so `SELECT 1;` is one statement.
 */
export declare function splitAgentSqlStatements(tokens: AgentSqlToken[]): AgentSqlToken[][];
/** The first keyword of a statement, ignoring leading parentheses. */
export declare function leadingAgentSqlKeyword(tokens: AgentSqlToken[]): string | null;
export interface AgentSqlQualifiedReference {
    /** Every name before the last dot, as the database resolves them. */
    qualifiers: string[];
    name: string;
    /** Index of the first token of the reference. */
    index: number;
}
/**
 * Every dotted name chain, such as `a.b` or `a.b.c`. The lexer has already
 * removed comments and whitespace, so spacing or comments around the dot do
 * not hide a chain. Column references (`alias.column`) are included; callers
 * decide which qualifiers matter.
 */
export declare function agentSqlQualifiedReferences(tokens: AgentSqlToken[]): AgentSqlQualifiedReference[];
/** Names immediately followed by `(`, i.e. function calls and type modifiers. */
export declare function agentSqlCalledNames(tokens: AgentSqlToken[]): string[];
/**
 * Type-conversion candidates in Postgres expressions. Calls are included
 * because `name(value)` can resolve as a cast instead of a function.
 */
export declare function agentSqlTypeNames(tokens: AgentSqlToken[]): Set<string>;
/** Every unquoted and quoted identifier value in the statement. */
export declare function agentSqlIdentifierNames(tokens: AgentSqlToken[]): Set<string>;