oracle 0.3.3

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.. _dpiSodaCollCursorFunctions:

ODPI-C SODA Collection Cursor Functions
---------------------------------------

SODA collection cursor handles are used to represent SODA collection cursors.
They are created by calling the function :func:`dpiSodaDb_getCollections()`
and are destroyed when the last reference is released by calling the function
:func:`dpiSodaCollCursor_release()`.

See `this tracking issue <https://github.com/oracle/odpi/issues/110>`__ for
known issues with SODA.

.. function:: int dpiSodaCollCursor_addRef(dpiSodaCollCursor \*cursor)

    Adds a reference to the SODA collection cursor. This is intended for
    situations where a reference to the cursor needs to be maintained
    independently of the reference returned when the cursor was created.

    The function returns DPI_SUCCESS for success and DPI_FAILURE for failure.

    **cursor** [IN] -- the cursor to which a reference is to be added. If the
    reference is NULL or invalid an error is returned.


.. function:: int dpiSodaCollCursor_close(dpiSodaCollCursor \*cursor)

    Closes the cursor and makes it unusable for further work immediately,
    rather than when the reference count reaches zero.

    The function returns DPI_SUCCESS for success and DPI_FAILURE for failure.

    **cursor** [IN] -- a reference to the cursor which is to be closed. If the
    reference is NULL or invalid an error is returned.


.. function:: int dpiSodaCollCursor_getNext(dpiSodaCollCursor \*cursor, \
        uint32_t flags, dpiSodaColl \**coll)

    Gets the next collection from the cursor, if there is one.

    The function returns DPI_SUCCESS for success and DPI_FAILURE for failure.

    **cursor** [IN] -- the cursor from which the next collection is to be
    retrieved. The the reference is NULL or invalid an error is returned.

    **flags** [IN] -- one or more of the values from the enumeration
    :ref:`dpiSodaFlags<dpiSodaFlags>`, OR'ed together. Only the value
    DPI_SODA_FLAGS_DEFAULT is currently supported.

    **coll** [OUT] -- a pointer to a reference to the next collection in the
    cursor, if one exists. If no further collections are available from the
    cursor, NULL is returned instead. The function
    :func:`dpiSodaColl_release()` should be called when the collection is no
    longer required.


.. function:: int dpiSodaCollCursor_release(dpiSodaCollCursor \*cursor)

    Releases a reference to the SODA collection cursor. A count of the
    references to the cursor is maintained and when this count reaches zero,
    the memory associated with the cursor is freed.

    The function returns DPI_SUCCESS for success and DPI_FAILURE for failure.

    **cursor** [IN] -- the cursor from which a reference is to be released.
    If the reference is NULL or invalid an error is returned.