httk.store.backend.duckdb.hooks
===============================

.. py:module:: httk.store.backend.duckdb.hooks

.. autoapi-nested-parse::

   DuckDB engine hooks: the per-dialect behavior the neutral SQL engine dispatches to.

   :mod:`httk.store.backend.sql.engine` keeps only neutral dialect dispatch; the
   DuckDB-specific bodies live here and are imported lazily on first use by the
   ``_DIALECT_HOOKS`` registry in :mod:`httk.store.backend.sql.engine`.



Functions
---------

.. autoapisummary::

   httk.store.backend.duckdb.hooks.install_engine_functions


Module Contents
---------------

.. py:function:: install_engine_functions(engine)

   Install the exact-fraction scalar function on every DuckDB connection.

   Fraction values are persisted canonically as text because SQL integer
   products can overflow long before a valid Python :class:`~fractions.Fraction`
   does; ``httk_fraction_scaled_equal`` preserves exact comparisons without
   touching presentation float columns.

   :param engine: The DuckDB SQLAlchemy engine to install the function on.
   :return: None.