C++Talk.NET

martinbertolino@yahoo.com · Guest

I'm working on a a fairly large application written in C++ that
interacts with an Oracle database server. As a consequence to this
there are several hundred SQL queries embedded in the source code that
look like the following:

dbcp->prepareStatement(
"select count(1) "
"from sss_employer_default_role "
"where "
"employer_code = :employer_code and "
"group_id in ( "
"select b.group_sequence_id from "
"sss_employer_group_hierarchy b "
"start with b.group_sequence_id in ( "
"select c.group_sequence_id "
"from sss_employee_group_membership c "
"where c.user_sequence_id = :requesting_user_sequence_id) "
"connect by b.group_sequence_id = prior b.parent_group_sequence_id)
and "
"application_id = :application_id and "
"application_role = :application_role and "
"role_allowed = :role_allowed and "
"authority_over_group_id = :authority_over_group_id and "
":role_effective_date_time between effective_date_time and
expiration_date_time");

dbcp->addBinding(":employer_code", employer_code);
dbcp->addBinding(":requesting_user_sequence_id",
requesting_user_sequence_id);

// rest of the interaction with Oracle

As you can see the SQL statement does not look very clear (or pretty).
Additionally when I have to tune or debug the SQL in a separate tool
(sql*plus) I have to edit it to remove the quotes and once the SQL has
been tuned or debugged then paste it back onto the C++ source code and
add the quotes again.

Has anyone out there encountered this problem also? Are there any
suggestions to improve the legibility of this (mixed) code so the text
within the string does not need so much editing?

I was thinking about stripping out the SQL, save them in seperate
files, link them in as text resources into the executable/dll image
(this is a Win32 IIS ISAPI extension), and finally create some code
that retrieves the text of the SQL given some resource ID. The only
draw back about this is that it keeps two related sets of code (C++ and
SQL) in separate areas.

My ideal solution here would be to have Python's multiline strings:

dbcp->prepareStatement("""
select *
from table
where ...
""");

but it is obviously not an option.
Any suggestions are welcome.

Thanks,
Martin

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James Talbut · Guest

<martinbertolino (AT) yahoo (DOT) com> wrote

James Rafter · Guest

Of course this is not just C++ specific but you really don't want to be
doing this. Bad readability and cutting and pasting are the least of
your worries. If you had to change a table think how cumbersome it
would be to find and modify all the code that touched a specific table.

A good way to manage database interaction is to place all queries in
stored procedures. This may be a sysbase specific term but I doubt it.
These are stored in a table in the database so it is very easy to see
all queries that interact with the database or specific table. This is
a huge win just on managing the code base alone.

But there are other wins with this approach. One is that you decouple
the database table and column names from your code. With a stored
proc, all you need to know is the name of the proc and the types of
data coming back (int, double, etc). Of course you would probably
use the same names initially but as things change (now you need to get
this data from a different table or database) the maintenance is
much easier.

Also, embedding text is slower than using stored procs. Each time the
query is executed it needs to be parsed and compiled by the SQL server
before being executed. This is already done for stored procs. Try
doing a simple query in a loop and profile the time it takes with a
text string versus a stored proc.

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Bob Hairgrove · Guest

On 18 Dec 2004 07:31:55 -0500, "James Rafter" <jjr2004a (AT) yahoo (DOT) com>
wrote:

James Talbut · Guest

"Bob Hairgrove" <invalid (AT) bigfoot (DOT) com> wrote

Bob Hairgrove · Guest

On 19 Dec 2004 19:43:45 -0500, "James Talbut"
<clcppm-poster (AT) this (DOT) is.invalid> wrote:

Bob Hairgrove · Guest

(you
will need one for the top also).
Boil the prepared delicacy until the meat starts to come off the bones.
Remove, de-bone and cube; continue to reduce the broth.
Brown the onions, peppers and celery.
Add the meat then season, continue browning.
De-glaze with sherry, add the reduced broth.
Finally, put in the root vegetables and simmer for 15 minutes.
Allow to cool slightly.
Place the pie pan in 375 degree oven for a few minutes so bottom crust is not soggy,
reduce oven to 325.
Fill the pie with stew, place top crust and with a fork, seal the crusts together
then poke holes in top.
Return to oven and bake for 30 minutes, or until pie crust is golden brown.

Sudden Infant Death Soup

SIDS: delicious in winter, comparable to old fashioned Beef and Vegetable Soup.
Its free, you can sell the crib, baby clothes, toys, stroller... and so easy to
procure if such a lucky find is at hand (just pick him up from the crib and
he?s good to go)!

SIDS victim, cleaned
½ cup cooking oil
Carrots
onions
broccoli
whole cabbage
fresh green beans
potato
turnip
celery
tomato
½ stick butter
1 cup cooked pasta (macaroni, shells, etc.)

Remove as much meat as possible, cube, and brown in hot oil.
Add a little water, season, then add the carcass.
Simmer for half an hour keeping the stock thick.
Remove the carcass and add the vegetables slowly to the stock,
so that

Bob Hairgrove · Guest

stuffed crab or lobster shells;
make patties if shell or head is not available
(such as with packaged crawfish, crab, or headless baby).
Flour
oil
onions
bell peppers
garlic salt, pepper, etc.
3 cups chicken stock
2 sticks butter
3 tablespoons oil

First stuff the heads, or make the patties (see index)
then fry or bake.
Set aside to drain on paper towels.
Make a roux with butter, oil and flour,
brown vegetables in the roux, then add chicken stock and
allow to simmer for 20 minutes.
Add the patties or stuffed heads, and some loose crawfish,
lobster, long piglet, or what have you.
Cook on low for 15 minutes, then allow it to set for at least
15 minutes more.
Serve over steamed rice; this dish is very impressive!

Stuffed Cabbage Rolls

Babies really can be found under a cabbage leaf -
or one can arrange for ground beef to be found there instead.

8 large cabbage leaves
1 lb. lean ground newborn human filets, or ground chuck
Onions
peppers
celery
garlic
soy sauce
salt pepper, etc
Olive oil
breadcrumbs
Tomato Gravy (see index)

Boil the cabbage leaves for 2 minutes to soften.
In skillet, brown the meat in a little olive oil,
then add onions, peppers, and celery (all chopped finely)
and season well.
Place in a large bowl and cool.
Add seasoned breadcrumbs and a little of the tomato gravy,
enough to make the mixture pliable.
Divide the stuffing among the cabbage leaves then roll.
Place seam down in a baking pan.
Ladle to

Allan W · Guest

James Rafter wrote:

Allan W · Guest

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