Dynamic BULK SELECT/MODIFY

Question

Hi,
When using EXECUTE IMMEDIATE with a dynamically
built SELECT/INSERT statement with varying
tablename, fieldnames, fieldtypes and fieldcounts
how do I make the BULK COLLECT INTO/USING parts
dynamic too?
Can I use RECTYPE arrays if the type depends on
the dynamic statement? Kind of like (pseudo-code)
procedure FETCH(p_Stmt VARCHAR2)
valueType TABLE OF p_Stmt%REC_TYPE INDEXED BY
BINARY_INTEGER;
values valueType;
LOOP
EXECUTE IMMEDIATE p_Stmt
BULK COLLECT INTO values LIMIT 1000;
FOR values LOOP
-- use values.a and values.b
END LOOP
END LOOP;
FETCH('SELECT a,b FROM t');
If I'm forced to use DBMS_SQL and bind OUT/IN arrays
of different types do I need to pre-allocate arrays
of each type against the chance that up to (say)
a 100 DATE columns end up in need of beeing bound?
Or can I reuse one array per type because the methods
copy the arrays? Or is there a generic type that can
be used to bind whatever type the column has?
regards,
Schenke

Answer 1

Hi Justin,
So I gathered (my question mentioned this option).
I only had gotten the impression from some comments
that DBMS_SQL may be slower than EXECUTE IMMEDIATE
because of the extra layer of flexibility. Maybe
there will be more parsing too.
There seems to be no way to define the arrays needed
for the DBMS_SQL-IN/OUT-binds dynamically. I don't
think reusing the same array for different columns
will work either. That means arrays must be defined
against all possible columns or at least enough of
each type with a dynamic allocation process (i.e.
count the number of columns for each type and assign
arrays with names like date1, date2, date3, ... to
the 1., 2., 3... DATE column in the statement.)
regards,
Schenke