import { ConditionOperand } from './schema.js';
/**
 * Extracts a value from a nested row structure
 * @param namespacedRow The nested row structure
 * @param columnRef The column reference (may include table.column format)
 * @param mainTableAlias The main table alias to check first for columns without table reference
 * @param joinedTableAlias The joined table alias to check second for columns without table reference
 * @returns The extracted value or undefined if not found
 */
export declare function extractValueFromNamespacedRow(namespacedRow: Record<string, unknown>, columnRef: string, mainTableAlias?: string, joinedTableAlias?: string): unknown;
/**
 * Evaluates an operand against a nested row structure
 */
export declare function evaluateOperandOnNamespacedRow(namespacedRow: Record<string, unknown>, operand: ConditionOperand, mainTableAlias?: string, joinedTableAlias?: string): unknown;
/**
 * Extracts a join key value from a row based on the operand
 * @param row The data row (not nested)
 * @param operand The operand to extract the key from
 * @param defaultTableAlias The default table alias
 * @returns The extracted key value
 */
export declare function extractJoinKey<T extends Record<string, unknown>>(row: T, operand: ConditionOperand, defaultTableAlias?: string): unknown;