Function dpiConn_newVar 

pub unsafe extern "C" fn dpiConn_newVar(
    conn: *mut dpiConn,
    oracleTypeNum: dpiOracleTypeNum,
    nativeTypeNum: dpiNativeTypeNum,
    maxArraySize: u32,
    size: u32,
    sizeIsBytes: c_int,
    isArray: c_int,
    objType: *mut dpiObjectType,
    var: *mut *mut dpiVar,
    data: *mut *mut dpiData,
) -> c_int

Returns a reference to a new variable which can be used for binding data to a statement or providing a buffer for querying data from the database. The reference should be released as soon as it is no longer needed.

The function returns DPI_SUCCESS for success and DPI_FAILURE for failure.