You could give each product an ID number and use that as a proxy. On Wed, Oct 9, 2024 at 5:01 PM Yi Cao <cao.yi.s...@gmail.com> wrote: > > Let's take a simple example. No network connection is involved. Say I can > have an array table of digital products, which has one column of shared_ptr > pointing to a product object allocated on heap. I would like to do filtering > on the column "brand" using the value "Samsung". Therefore I can get all rows > of "Samsung" products and by accessing the column of shared pointer , I can > access details of this product. Without using a shared pointer, I would have > to copy the product details into multiple columns of this table. If I save > all these shared pointers in a separate vector, then I cannot do filtering > like that in the arrow table. > > The challenge for me is how to store a shared_ptr in a "cell" of an arrow > table. It seems to me only the primitive types are supported, but I would > like to confirm. I think the "extension" type might help with my scenario but > I'm not sure how to make it work. If it's a simple type like integer, I can > do IntBuilder to build an array and make a record batch out of it. > > Hope this provides a bit of clarity. Thank you. > > On Wed, 9 Oct 2024 at 19:12, Andrew Bell <andrew.bell...@gmail.com> wrote: >> >> >> On Wed, Oct 9, 2024, 12:27 PM Yi Cao <cao.yi.s...@gmail.com> wrote: >>> >>> If I place these shared ptrs in a vector, how can I make this vector saved >>> in Arrow table as a column? Is it possible? >> >> >> What do you mean by "saved"? >> >> I don't understand the point of placing shared pointers in an arrow array. >> It's essentially equivalent to storing the pointers in a vector. You can't >> write shared pointers to a data store or send them across a network >> connection.
-- Andrew Bell andrew.bell...@gmail.com
