func (stmt *statement) bindByteArray(index int, value []byte, direction ParameterDirection) error {
// Store both value and lenght, because we need a pointer to the lenght in
// the last parameter of SQLBindParamter. Otherwise the data is assumed to
// be a null terminated string.
bindVal := &struct {
value []byte
length int
}{
value,
len(value),
}
sqlType := odbc.SQL_VARBINARY
if bindVal.length > 4000 {
sqlType = odbc.SQL_LONGVARBINARY
}
// Protect against index out of range on &bindVal.value[0] when value is zero-length.
// We can't pass NULL to SQLBindParameter so this is needed, it will still
// write a zero length value to the database since the length parameter is
// zero.
if bindVal.length == 0 {
bindVal.value = []byte{'\x00'}
}
ret := odbc.SQLBindParameter(stmt.handle, odbc.SQLUSMALLINT(index), direction.SQLBindParameterType(), odbc.SQL_C_BINARY, sqlType, odbc.SQLULEN(bindVal.length), 0, odbc.SQLPOINTER(unsafe.Pointer(&bindVal.value[0])), 0, (*odbc.SQLLEN)(unsafe.Pointer(&bindVal.length)))
if isError(ret) {
return errorStatement(stmt.handle, fmt.Sprintf("Bind index: %v, Value: %v", index, value))
}
return nil
}
func (stmt *statement) bindString(index int, value string, length int, direction ParameterDirection) error {
if length == 0 {
length = len(value)
}
stmt.bindValues[index] = syscall.StringToUTF16(value)
var sqlType odbc.SQLDataType
if length < 4000 {
sqlType = odbc.SQL_VARCHAR
} else {
sqlType = odbc.SQL_LONGVARCHAR
}
ret := odbc.SQLBindParameter(stmt.handle, odbc.SQLUSMALLINT(index), direction.SQLBindParameterType(), odbc.SQL_C_WCHAR, sqlType, odbc.SQLULEN(length), 0, odbc.SQLPOINTER(unsafe.Pointer(&stmt.bindValues[index].([]uint16)[0])), 0, nil)
if isError(ret) {
return errorStatement(stmt.handle, fmt.Sprintf("Bind index: %v, Value: %v", index, value))
}
return nil
}