/**
 * Lightweight SQL builder for PostgreSQL.
 * Replaces squel dependency with minimal overhead — builds SQL strings
 * directly with $N numbered parameter placeholders.
 */
/**
 * Result of a parameterized query build
 */
export interface ParamResult {
    text: string;
    values: unknown[];
}
/**
 * Escape literal `?` characters in a SQL fragment so they survive placeholder
 * substitution, then convert `$N` parameters back to `?` placeholders.
 *
 * Used when embedding an already-built subquery into an outer query: the outer
 * builder re-numbers `?` placeholders, so any literal `?` the subquery contains
 * (e.g. the JSONB `?` / `?&` / `?|` operators) must be escaped to `??` first.
 */
export declare function toPlaceholders(sql: string): string;
/**
 * Minimal SELECT query builder for PostgreSQL.
 * Produces parameterized queries with $1, $2, ... placeholders.
 * Uses parallel arrays instead of object arrays to minimize allocations.
 */
export declare class SelectBuilder {
    private _table;
    private _fields;
    private _joins;
    private _wConds;
    private _wVals;
    private _groups;
    private _hConds;
    private _hVals;
    private _orders;
    private _limit;
    private _offset;
    from(table: string): this;
    field(expr: string, _alias?: string): this;
    fields(fieldList: string[]): this;
    join(tableRef: string, _alias: undefined, on: string): this;
    left_join(tableRef: string, _alias: undefined, on: string): this;
    right_join(tableRef: string, _alias: undefined, on: string): this;
    where(condition: string, ...values: unknown[]): this;
    /**
     * Add WHERE clause with values as array (avoids spread overhead)
     */
    whereArr(condition: string, values: unknown[]): this;
    group(field: string): this;
    having(condition: string, values: unknown[]): this;
    order(column: string, asc: boolean): this;
    limit(n: number): this;
    offset(n: number): this;
    /**
     * Build parameterized query with $1, $2, ... placeholders
     */
    toParam(): ParamResult;
    /**
     * Build SQL string with inline values (for debugging / subqueries)
     */
    toString(): string;
}
/**
 * Create a new SELECT builder
 */
export declare function select(): SelectBuilder;
//# sourceMappingURL=sql-builder.d.ts.map