Greetings, I'm having a problem using heap_form_tuple. I'm trying to form a HeapTuple to use it later with simple_heap_insert. My code looks like this:
------------------ Datum *values; bool *nulls; int natts; TupleDesc tupDesc; HeapTuple tuple; ... tupDesc = RelationGetDescr(...my previously opened relation...); natts = tupDesc->natts; values = (Datum *)palloc(natts*sizeof(Datum *)); nulls = (bool *)palloc(natts*sizeof(bool *)); memset(nulls, false, natts * sizeof(nulls)); values[0] = ...GetDatum(...my datum...); ... values[natts-1] = ...GetDatum(...my datum...); ... tuple = heap_form_tuple(tupDesc, values, nulls); ------------------ When I come to last line, I get these errors (I'm using valgrind): ==25850== Source and destination overlap in memcpy(0x8BCB070, 0x4CF2480, 496753820) ==25850== at 0x4024586: memcpy (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so) ==25850== by 0x808C811: heap_fill_tuple (in /usr/local/pgsql/bin/postgres) ==25850== by 0x808D72F: heap_form_tuple (in /usr/local/pgsql/bin/postgres) ... ==25850== Invalid read of size 1 ==25850== at 0x40245A1: memcpy (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so) ==25850== by 0x808C811: heap_fill_tuple (in /usr/local/pgsql/bin/postgres) ==25850== by 0x808D72F: heap_form_tuple (in /usr/local/pgsql/bin/postgres) ... ==25850== Address 0x8BCB027 is 1 bytes before a block of size 496,753,892 alloc'd ==25850== at 0x4022825: malloc (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so) ==25850== by 0x82BE278: AllocSetAlloc (in /usr/local/pgsql/bin/postgres) ==25850== by 0x82BEE91: MemoryContextAllocZero (in /usr/local/pgsql/bin/postgres) ==25850== by 0x808D694: heap_form_tuple (in /usr/local/pgsql/bin/postgres) ... ==25850== Address 0x8BCB027 is 2 bytes before a block of size 496,753,892 alloc'd ... ==25850== Address 0x8BCB027 is 3 bytes before a block of size 496,753,892 alloc'd ... ==25850== Address 0x8BCB027 is 4 bytes before a block of size 496,753,892 alloc'd ... ==25850== Process terminating with default action of signal 11 (SIGSEGV) ==25850== Access not within mapped region at address 0x8BCAFFF ==25850== at 0x40245A1: memcpy (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so) ==25850== by 0x808C811: heap_fill_tuple (in /usr/local/pgsql/bin/postgres) ==25850== by 0x808D72F: heap_form_tuple (in /usr/local/pgsql/bin/postgres) If I work on tables with only 1 attribute, I use normal variables (Datum values, bool nulls) instead of arrays, and using heap_form_tuple(TupleDesc td, &values, &nulls) works flawlessly. What am i missing? Thanks in advance for help, Claudio Rossi -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
