"Dennis Cote" wrote,
jose isaias cabrera wrote:
So, there is on way of doing it in one call/instruction as I previously
exampled, correct? I will have to do them in many calls, correct?
Jose,
You can do it in one API call if you put all the update statements into a
single string. You will probably also want to add a begin and end around
the updates so they are all done atomically in the database. You can then
pass this string containing multiple statement to sqlite3_exec() and it
will execute all the statements one after the other.
UPDATE table SET
ID = '88' if not = '88',
parent = '1171291314642' if null,
children = '',
login = 'blah',
notes = 'blah-blah' if null,
status = 'o'
WHERE ProjID = '88';
Would become
string sql = "begin;"
"update table "
" set ID = '88', children = '', login = 'blah', status =
'o' " " where ProjId = '88';"
"update table "
" set parent = '1171291314642' "
" where ProjID = '88' AND parent IS NULL;"
"update table "
" set notes = 'blah-blah' "
" where ProjID = '88' AND notes IS NULL;"
"commit;";
int rc = sqlite3_exec(db, sql.c_str(), 0, 0, 0);
Each update must have the same condition, but it can set multiple fields.
The sqlite3_exec() function will execute all the SQL statements in a
string in one call.
None of these are working...
BEGIN;
UPDATE LSOpenJobs SET bdate = '2007-03-02' WHERE ProjID = '215' AND bdate IS
NULL;
UPDATE LSOpenJobs SET ddate = coalesce(ddate, '2007-03-05') WHERE ProjID =
'215'; UPDATE LSOpenJobs SET edate = ifnull(edate,'2007-03-05') WHERE ProjID
= '215';
COMMIT;
Any ideas? If I just set them, they do work.
thanks,
josé
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