Preparedstatement with multiple parameters on joined tables w/ (AND,OR)??

Question

Ihave a Query that reads a list of materials (1 to many) and a string of delimited numbers. I am currently going through a couple of loops to build my Query string. For example:
WHERE (materials.material = '?' OR materials.material = '?' )........ AND (materials.ONE = '?' "; OR materials.ONE = '?' "; )........
It also involves reading data from two tables: See Query String below:
Query = "Select transactions.control,transactions.date_sent, transactions.date_received, transactions.sender,transactions.recipient,materials.control,materials.material,materials.R,materials.ONE,materials.parent_item,materials.sub_ctrl,materials.quanity FROM transactions LEFT JOIN materials ON transactions.control = materials.control WHERE (LOOP) materials.material = '?' AND (LOOP)materials.ONE = '?' ";
Is it possible to use a preparedstatement with parameters when the number of parameters is unknown until the user selects them?

Answer 1

Is it possible to use a preparedstatement withparameters when the number of parameters is unknown
until the user selects them?
masuda1967 is being too Japanese. The answer to your
question is "No".Actually, I would take masuda-san's suggestion--sort of.
You can do the incremental query construction he suggested, but with prepared statements. Something like this. (Note: Probably doesn't match your code exactly, but you should get the idea.)StringBuffer query = new StringBuffer("select ... whatever ...");
for (int ix = 0; ix < numParams; ix++) {
    if (x > 0) {
        query.append(", ")
    query.append(" ? ");
ps = con.prepareStatement(query.toString());
for (int ix = 0; ix < numParams; ix++) {
    set the param
} You won't get the performance benefit that can come from using PreparedStatement, but you still avoid the headache of escaping strings, formatting dates, etc.
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