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use {ffi, Return, Result, Raii, Handle, Statement};
use super::types::OdbcType;
impl<'a, 'b, S, R> Statement<'a, 'b, S, R> {
pub fn bind_parameter<'c, T>(
mut self,
parameter_index: u16,
value: &'c T,
) -> Result<Statement<'a, 'c, S, R>>
where
T: OdbcType<'c>,
T: ?Sized,
'b: 'c,
{
let ind = if value.value_ptr() == 0 as *const Self as ffi::SQLPOINTER {
ffi::SQL_NULL_DATA
} else {
value.column_size() as ffi::SQLLEN
};
let ind_ptr = self.param_ind_buffers.alloc(parameter_index as usize, ind);
self.raii
.bind_input_parameter(parameter_index, value, ind_ptr)
.into_result(&self)?;
Ok(self)
}
pub fn reset_parameters(mut self) -> Result<Statement<'a, 'a, S, R>> {
self.param_ind_buffers.clear();
self.raii.reset_parameters().into_result(&mut self)?;
Ok(Statement::with_raii(self.raii))
}
}
impl Raii<ffi::Stmt> {
fn bind_input_parameter<'c, T>(&mut self, parameter_index: u16, value: &'c T, str_len_or_ind_ptr: *mut ffi::SQLLEN) -> Return<()>
where
T: OdbcType<'c>,
T: ?Sized,
{
match unsafe {
ffi::SQLBindParameter(
self.handle(),
parameter_index,
ffi::SQL_PARAM_INPUT,
T::c_data_type(),
T::sql_data_type(),
value.column_size(),
value.decimal_digits(),
value.value_ptr(),
0,
str_len_or_ind_ptr,
)
} {
ffi::SQL_SUCCESS => Return::Success(()),
ffi::SQL_SUCCESS_WITH_INFO => Return::SuccessWithInfo(()),
ffi::SQL_ERROR => Return::Error,
r => panic!("Unexpected return from SQLBindParameter: {:?}", r),
}
}
fn reset_parameters(&mut self) -> Return<()> {
match unsafe { ffi::SQLFreeStmt(self.handle(), ffi::SQL_RESET_PARAMS) } {
ffi::SQL_SUCCESS => Return::Success(()),
ffi::SQL_SUCCESS_WITH_INFO => Return::SuccessWithInfo(()),
ffi::SQL_ERROR => Return::Error,
r => panic!("SQLFreeStmt returned unexpected result: {:?}", r),
}
}
}