Re: PQescapeStringConn

On 30/07/10 07:52, Scott Frankel wrote:
> I have a number of very long strings that each contain many instances of
> semi-colons, single quotes, forward and back slashes, etc. I'm looking
> for an efficient and safe way to write them to my db using a prepared
> statement.

What language? From "C"?

> PREPARE fooprep (VARCHAR(32), text, text) AS
> INSERT INTO foo (name, description, body) VALUES ($1, $2, $3);
> EXECUTE fooprep('foo1', 'this is foo1',

This is basically PQprepare+PQexecPrepared, or PQexecParams if you want
to do both in one step. There is no need to escape strings if they are
passed as parameters - the library knows it's a string and handles that
for you.

Where you *do* have to worry about escaping strings is if you are
building up a query and have e.g. a varying table-name. It's legal for
table names to contain spaces etc. but they need to be quoted correctly.

Every application language will have its own library, but they all have
a similar prepare+exec option (and I think most use the "C" libpq
interface underneath).

--
Richard Huxton
Archonet Ltd