On Sat, 2010/03/06, Joanna Carter cocoa...@carterconsulting.org.uk wrote:
This quote from the Core Data Programming Guide:
There are some interactions between fetching and
the type of store. In the XML, binary, and
in-memory stores, evaluation of the predicate and
sort
Hi Mark
Thanks all for the sharing of thoughts. Glad someone could confirm that what
I was attempting did not make sense from the SQL perspective (which I am a
newbie to). But, like Sean wrote, Core Data seems to be presented as an
abstraction ABOVE the layer which implements the actual
On 3/5/10 5:52 PM, Mark Sanvitale said:
However, my experience seems to demonstrates that the statement We (the
system) cannot necessarily translate arbitrary predicates into SQL
queries is also true,
It definitely is.
and I believe this concept should be expanded to
spell out exactly what
RANT AGAINST DOCUMENTATION:
I have searched (a lot) and found various other pleas for help of the form, I
am trying to do a Core Date fetch on an SQL-backed store and it is failing
because something is wrong with my predicate. I thought some investigate
could promote my plea beyond this basic
Hi Mark
So, here is my plea for help. I have a predicate of the form: character
string BEGINSWITH path. In other words, I am searching entities that
possess a (string) property path to look for one whose path is a prefix of
some string (which is inserted into the predicate via the
On 3/5/10 10:18 PM, Joanna Carter said:
So, here is my plea for help. I have a predicate of the form:
character string BEGINSWITH path. In other words, I am searching
entities that possess a (string) property path to look for one whose
path is a prefix of some string (which is inserted into
Hi Sean
But you shouldn't have to... Core Data is not a database and its use
of SQL is an implementation detail. One shouldn't have to know anything
about SQL to use Core Data. Of course, in practice, such knowledge is
helpful, as you say.
You have a point but, in theory, predicates
Thanks all for the sharing of thoughts. Glad someone could confirm that what I
was attempting did not make sense from the SQL perspective (which I am a newbie
to). But, like Sean wrote, Core Data seems to be presented as an abstraction
ABOVE the layer which implements the actual
