export declare class DDLToFixtureConverter {
    /**
     * Converts DDL statements (CREATE TABLE) in the provided SQL text to a Fixture JSON object.
     * Ignores non-DDL statements and parse errors.
     *
     * @param ddlSql The SQL text containing CREATE TABLE statements.
     * @returns A Record representing the Fixture JSON.
     */
    static convert(ddlSql: string): Record<string, any>;
    /**
     * Applies `ALTER TABLE ... ALTER COLUMN ... SET/DROP DEFAULT` actions to the table registry.
     *
     * Uses normalization-based resolution to map `ALTER TABLE` targets to matching `CREATE TABLE` entries.
     * Ambiguous or unresolved table names are skipped to avoid accidental cross-table updates.
     *
     * Only `AlterTableAlterColumnDefault` actions are processed; all other ALTER TABLE actions are ignored.
     *
     * @param registry The table definition registry built from `CREATE TABLE` statements.
     * @param alterStatements The `ALTER TABLE` statements to apply.
     */
    private static applyAlterTableStatements;
    private static extractValue;
    private static formatDefaultValue;
}