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These are just a few particularly egregious cases that were hard to read
and write, and error prone because of many similar adjacent types.
Discussion: https://www.postgresql.org/message-id/flat/4c9f01be-9245-2148-b569-61a8562ef190%402ndquadrant.com
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The simple slicing API (sq_slice, sq_ass_slice) has been deprecated
since Python 2.0 and has been removed altogether in Python 3, so remove
those functions from the PLyResult class. Instead, the non-slice
mapping functions mp_subscript and mp_ass_subscript can take slice
objects as an index. Since we just pass the index through to the
underlying list object, we already support that. Test coverage was
already in place.
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Python Py*_New() functions can fail and return NULL in out-of-memory
conditions. The previous code handled that inconsistently or not at
all. This change organizes that better. If we are in a function that
is called from Python, we just check for failure and return NULL
ourselves, which will cause any exception information to be passed up.
If we are called from PostgreSQL, we consistently create an "out of
memory" error.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
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This is a mechanical change in preparation for a later commit that
will change the layout of TupleDesc. Introducing a macro to abstract
the details of where attributes are stored will allow us to change
that in separate step and revise it in future.
Author: Thomas Munro, editorialized by Andres Freund
Reviewed-By: Andres Freund
Discussion: https://postgr.es/m/CAEepm=0ZtQ-SpsgCyzzYpsXS6e=kZWqk3g5Ygn3MDV7A8dabUA@mail.gmail.com
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This is intended so that say plpy.debug(rv) prints something useful for
debugging query execution results.
reviewed by Steve Singer
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It is apparently no longer used after the new slicing support was
implemented (a97207b6908f1d4a7d19b37b818367bb0171039f), so let's
remove the dead code and see if anything cares.
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commit-fest.
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The old way of implementing slicing support by implementing
PySequenceMethods.sq_slice no longer works in Python 3. You now have
to implement PyMappingMethods.mp_subscript. Do this by simply
proxying the call to the wrapped list of result dictionaries.
Consolidate some of the subscripting regression tests.
Jan Urbański
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The result object methods colnames() etc. would crash when called
after a command that did not produce a result set. Now they throw an
exception.
discovery and initial patch by Jean-Baptiste Quenot
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Add result object functions .colnames, .coltypes, .coltypmods to
obtain information about the result column names and types, which was
previously not possible in the PL/Python SPI interface.
reviewed by Abhijit Menon-Sen
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For easier source reading
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This moves the code around from one huge file into hopefully logical
and more manageable modules. For the most part, the code itself was
not touched, except: PLy_function_handler and PLy_trigger_handler were
renamed to PLy_exec_function and PLy_exec_trigger, because they were
not actually handlers in the PL handler sense, and it makes the naming
more similar to the way PL/pgSQL is organized. The initialization of
the procedure caches was separated into a new function
init_procedure_caches to keep the hash tables private to
plpy_procedures.c.
Jan Urbański and Peter Eisentraut
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