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Restrictions on binding variables in dynamic SQL


Restrictions on binding variables in dynamic SQL

By : user2951984
Date : November 18 2020, 03:49 PM
hop of those help? Variables in this case are bound by position, not by name. You have to repeat v1 variable like this
code :
open cut for v_sql using v1, v1, v2;


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dynamic variables binding in mysqli bind_param

dynamic variables binding in mysqli bind_param


By : user3026049
Date : March 29 2020, 07:55 AM
it helps some times when i try to below code it give me a warning
code :
$stmt = $mysqli->prepare('SELECT * FROM users WHERE lname = ? AND fname = ?');
$stmt->bind_param('ss', $param[0], $param[1]);
$stmt->execute();

//other version
$stmt = $mysqli->prepare('SELECT * FROM users WHERE lname = ? AND fname = ?');
$type = "ss";
$names = array("Maq", "bool");
$params = array(&$type, &$names[0], &$names[1]);

call_user_func_array(array($stmt, 'bind_param'), $params);
Binding multiple variables in PL/SQL dynamic statement using 'USING'

Binding multiple variables in PL/SQL dynamic statement using 'USING'


By : Ilya Ones
Date : March 29 2020, 07:55 AM
This might help you There is a dynamic statement with multiple bind variables in which the same variable is used at multiple places. The dynamic statement will also vary depending on the conditions. So the order of bind variables will vary , Use with clause to bind the variables first...
code :
with bind_val as (
    select 
        :company_id company_id,
        :template_id template_id,
        :date_from date_from,
        :date_to date_to
    from dual
)
SELECT 
    emp_no
FROM company_tab t 
join bind_val b 
on t.company_id = b.company_id 
where b.template_id IS NOT NULL 
AND b.date_from IS NOT NULL 
AND b.date_to IS NOT NULL 
AND t.emp_no in (
    SELECT 
        DISTINCT a.emp_no
    FROM tab1 t 
    join bind_val c 
    on t.company_id = c.company_id
    AND t.template_id = c.template_id
    join tab3 w
    on w.company_id = t.company_id
    AND w.param_id = t.param_id
    join tab2 a
    on a.company_id = t.company_id
    AND a.param_id = t.param_id

    where GREATEST(a.date_from, c.date_from) >= c.date_from
    AND a.date_from <= c.date_to
    AND NVL(a.date_to, c.date_to) >= c.date_from

    union all
    ......
)
Binding dynamic variables to datatable and processing each recursively

Binding dynamic variables to datatable and processing each recursively


By : sumesh NP
Date : March 29 2020, 07:55 AM
Any of those help Take a close look into the snippet for the conditions RemoveRows1, RemoveRows2 etc. for using much variables. Why not merge the conditions? I think you have to try something like this:
code :
 var rowsToRemove = dtremoverows.AsEnumerable()
                                .Where(r => 
                                (/* Condition for RemoveRows1 */) ||
                                (/* Condition for RemoveRows2 */) ||
                                (/* Condition for RemoveRows3 */) ||
                                (/* Condition for RemoveRows4 */) );
// And so on you can add conditions so that you will get a collection 
// of all rows that should be deleted from the table
// then iterate through those rows and perform delete like this:

foreach (var row in rowsToRemove)
{
     dtremoverows.Rows.Remove(row);
}
Binding variables in dynamic PL/SQL

Binding variables in dynamic PL/SQL


By : Jatan malde
Date : March 29 2020, 07:55 AM
I hope this helps you . In your Oracle version you can apply some tricks to your query in order to do this. The idea is to use a query in the following form:
Dynamic binding works for methods. Why not for other members [variables]?

Dynamic binding works for methods. Why not for other members [variables]?


By : NrdyN8
Date : March 29 2020, 07:55 AM
I wish this help you In Java, member variables have static binding because Java does not allow for polymorphic behavior with member variables.
private methods, as they are never inherited and the compiler can resolve calls to any private method at compile time only. Hence static binding.
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