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Issue #23758: Improve num_params docs of create_{function,aggregate} functions

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If you pass -1, the callable can take any number of arguments.

Added tests to verify the behavior.

Initial patch by Cédric Krier.
This commit is contained in:
Berker Peksag 2016-03-27 22:39:14 +03:00
parent f70fe6f6cf
commit fa0f62d6ab
2 changed files with 36 additions and 3 deletions
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8
Doc/library/sqlite3.rst
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@ -324,8 +324,9 @@ Connection Objects
Creates a user-defined function that you can later use from within SQL
statements under the function name *name*. *num_params* is the number of
parameters the function accepts, and *func* is a Python callable that is called
as the SQL function.
parameters the function accepts (if *num_params* is -1, the function may
take any number of arguments), and *func* is a Python callable that is
called as the SQL function.
The function can return any of the types supported by SQLite: bytes, str, int,
float and None.
@ -340,7 +341,8 @@ Connection Objects
Creates a user-defined aggregate function.
The aggregate class must implement a ``step`` method, which accepts the number
of parameters *num_params*, and a ``finalize`` method which will return the
of parameters *num_params* (if *num_params* is -1, the function may take
any number of arguments), and a ``finalize`` method which will return the
final result of the aggregate.
The ``finalize`` method can return any of the types supported by SQLite: