Hello,
If a tuple has a pointer to a TOAST table entry, would the tuple's length
stored in its corresponding Item include the length of the entry in the
TOAST table?
Thanks,
Vignesh
>
> You mean "even if relacl is not null"? Sounds improbable: AFAIR, pg_class
> tuples are built with heap_form_tuple, same as anything else.
>
> regards, tom lane
I am sorry. It was a bug in my code. I did not add the size of the tuple's
header field to the off variable
On Tue, Aug 25, 2015 at 2:56 PM, Tom Lane wrote:
> Vignesh Raghunathan writes:
> > Can the t_len field in HeapTuple structure be used to verify the length
> of
> > the tuple?
>
> > That is, if I calculate the length from the contents of the tuple using
> >
Hello,
Can the t_len field in HeapTuple structure be used to verify the length of
the tuple?
That is, if I calculate the length from the contents of the tuple using
data from pg_attribute for fixed length fields and the data from the header
for varlena fields, should it always match the value sto
Thank you very much for the response.
On Wed, Aug 12, 2015 at 6:31 PM, Tom Lane wrote:
> Vignesh Raghunathan writes:
> > I am working on a project which requires going through each field inside
> a
> > tuple without using postgresql. I have managed to iterate through each
Hello,
I am working on a project which requires going through each field inside a
tuple without using postgresql. I have managed to iterate through each
tuple inside a table by recycling postgres's code. However, for the part of
parsing through each field in the tuple, I am not able to think of an
Hello,
In the function heap_deform_tuple, there is a comment before caching
varlena attributes specifying that the offset will be valid for either an
aligned or unaligned value if there are no padding bytes. Could someone
please elaborate on this?
Also, why is it safe to call att_align_nominal if
Hello,
I was looking at the documentation for TOAST (
http://www.postgresql.org/docs/devel/static/storage-toast.html) and it's
specified that the toast pointer occupies 18 bytes. However, the struct
representing the toast pointer is defined as follows
typedef struct varatt_external
{
int3
