export interface SQLChunk<T = unknown> {
    sql: string;
    params: unknown[];
    _type?: T;
}
/**
 * Safely offsets parameter indices (e.g., $1 -> $5) in a SQL string.
 * Ignores $N inside single quotes (') and double quotes (").
 */
export declare function shiftParams(sql: string, paramsLength: number, offset: number): string;
/**
 * Tagged template literal for safe parameterized SQL.
 *
 * Usage:
 *   sql`SELECT * FROM users WHERE id = ${userId}`
 *   // => { sql: 'SELECT * FROM users WHERE id = $1', params: [userId] }
 */
export declare function sql<T = unknown>(strings: TemplateStringsArray, ...values: unknown[]): SQLChunk<T>;
export declare function isSQLChunk(value: unknown): value is SQLChunk<any>;
/** Combine multiple SQL chunks with a separator */
export declare function sqlJoin(chunks: SQLChunk<any>[], separator?: string): SQLChunk<any>;
/** Raw SQL — no parameterization, use with caution (only for trusted strings) */
export declare function rawSql<T = unknown>(query: string): SQLChunk<T>;
/** Format a JavaScript array into a Postgres array literal string: {"elem1","elem2"} */
export declare function toPgArray(val: unknown[]): string;
/** Resolve a column reference to its qualified SQL name */
export declare function colName(c: string | {
    name: string;
    tableName?: string;
} | SQLChunk): string;
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