SQL syntax

This SQL syntax is for a client function.

{? = call client_function(?, ?,...)}

Use the first parameter marker (“?") only when the first parameter is an output parameter.

The following code example invokes a client function when the first parameter is an output parameter: 
{? = call ifx_lo_open(?, ?, ?)}
The following code example invokes a client function when the first parameter is not an output parameter: 
{call ifx_lo_create(?, ?, ?, ?)}