Jaime Silvela wrote:
> Brian, that's not what I meant.
> Parsing of the uploaded file is just for the purpose of extracting the
> components of each spreadsheet row and constructing the INSERTs.
> Actually, whenever I copy from a file, either using COPY or with a
> custom importer, I put the data into a staging table, so that I can
> pre-process before writing to the main table. But why would COPYing from
> a file be so insecure?
>
I was under the impression that you were copying indiscriminately from
an uploaded CSV file ("spreadsheet" being ambiguous). Obviously, that
would be a Bad Thing to rely upon.
> nextval() and sequences are not what I'm looking for. I want to assign
> the same id to all the rows imported from the same file. Let's say user
> A is working on portfolio_id 3, and decides to upload a spreadsheet with
> new values. I want to be able to import the spreadsheet into the staging
> table, and assign a portfolio_id of 3 to all its entries.
> Of course, I can't just UPDATE the staging table to have portfolio_id =
> 3, because user B might also be uploading a sheet for portfolio_id = 9.
>
Seems like you need to adjust your schema to use a pivot table:
CREATE TABLE portfolio (
id SERIAL PRIMARY KEY,
...
CREATE TABLE portfolio_entries (
portfolio_id INT4 NOT NULL,
...
CONSTRAINT fk_portfolio_entries FOREIGN KEY (portfolio_id)
REFERENCES portfolio
ON DELETE CASCADE
Then you should be able to insert directly into the second table a row
for each entry (for want of a better word) that corresponds to a
particular portfolio.
brian
