Global error handling led to confusion and was hard to manage. With
this change, errors from PostgreSQL are immediately reported to Python
as exceptions. This requires setting a Python exception after
reporting the caught PostgreSQL error as a warning, because PLy_elog
destroys the Python exception state.
Ideally, all places where PostgreSQL errors need to be reported back
to Python should be wrapped in subtransactions, to make going back to
Python from a longjmp safe. This will be handled in a separate patch.
Jan Urbański
Reduce #includes to minimum actually needed; in particular include
postgres_fe.h not postgres.h, so as to stop build failures on some
platforms.
Use get_progname() instead of hardwired program name; improve error
checking for command line syntax; bring error messages into line with
style guidelines; include strerror result in die() cases.
The previous coding treated anything that wasn't an autovacuum launcher
as a normal backend, which is wrong now that we also have WAL senders.
Fujii Masao, reviewed by Robert Haas, Alvaro Herrera, Tom Lane,
and Bernd Helmle.
The new coding avoids a spurious debug message when a transaction
that has changed the isolation level has been rolled back. It also
allows the property to be freely changed to the current value within
a subtransaction.
Kevin Grittner, with one small change by me.
Un-break Windows build (I hope) by making the HAVE_FSYNC_WRITETHROUGH
code match the backend. Fix incorrect program help message. static-ize
all functions.
Actually rename the program, rather than just claiming we did. Hook it
into the build system. Get rid of useless dependency on libpq. Clean up
#include list and messy whitespace.
The way the exception types where added to the module was wrong for
Python 3. Exception classes were not actually available from plpy.
Fix that by factoring out code that is responsible for defining new
Python exceptions and make it work with Python 3. New regression test
makes sure the plpy module has the expected contents.
Jan Urbanśki, slightly revised by me
Failure to do so can lead to constraint violations. This was broken by
commit 1ddc2703a9 on 2010-02-07, so
back-patch to 9.0.
Noah Misch. Regression test by me.
Pay attention to the attisdropped field and skip over TupleDesc fields
that have it set. Not a real problem until we get table returning
functions, but it's the right thing to do anyway.
Jan Urbański
If the function using yield to return rows fails halfway, the iterator
stays open and subsequent calls to the function will resume reading
from it. The fix is to unref the iterator and set it to NULL if there
has been an error.
Jan Urbański
We can get the length of a compressed or out-of-line datum without actually
detoasting it. If the lengths of two strings are unequal, we can then
conclude they are unequal without detoasting. That saves considerable work
in an admittedly less-common case, without costing anything much when the
optimization doesn't apply.
Noah Misch
Two separate hash tables are used for regular procedures and for
trigger procedures, since the way trigger procedures work is quite
different from normal stored procedures. Change the signatures of
PLy_procedure_{get,create} to accept the function OID and a Boolean
flag indicating whether it's a trigger. This should make implementing
a PL/Python validator easier.
Using HTABs instead of Python dictionaries makes error recovery
easier, and allows for procedures to be cached based on their OIDs,
not their names. It also allows getting rid of the PyCObject field
that used to hold a pointer to PLyProcedure, since PyCObjects are
deprecated in Python 2.7 and replaced by Capsules in Python 3.
Jan Urbański
If the slice to be assigned to was before the existing array lower bound
(requiring at least one null element to spring into existence to fill the
gap), the code miscalculated how many entries needed to be copied from
the old array's null bitmap. This could result in trashing the array's
data area (as seen in bug #5840 from Karsten Loesing), or worse.
This has been broken since we first allowed the behavior of assigning to
non-adjacent slices, in 8.2. Back-patch to all affected versions.
Otherwise WAL recovery will replay the un-flushed WAL after walreceiver has
exited, which can lead to a non-recoverable standby if the system crashes hard
at that point.
