// 查询接口（按primary key查）
func SearchByPrimaryKey(table *Table, primary_key string) (error, []string) {
var c_request C.mdt_search_request_t
var c_response C.mdt_search_response_t
// convert request
c_request.primary_key.data = C.CString(primary_key)
c_request.primary_key.size = C.size_t(len(primary_key))
// invoke C api
C.mdt_search(table.rep, &c_request, &c_response, nil, nil)
// convert result & free result memory
err := Ok
var data_list []string
c_result_list := (*[1 << 30]C.mdt_search_result_t)(unsafe.Pointer(c_response.result_list))
if c_response.result_list_len == C.size_t(1) {
c_result := &c_result_list[0]
C.free(unsafe.Pointer(c_result.primary_key.data))
c_data_list := (*[1 << 30]C.mdt_slice_t)(unsafe.Pointer(c_result.data_list))
for j := C.size_t(0); j < c_result.data_list_len; j++ {
data_list = append(data_list, C.GoStringN(c_data_list[j].data, C.int(c_data_list[j].size)))
C.free(unsafe.Pointer(c_data_list[j].data))
}
C.free(unsafe.Pointer(c_result.data_list))
} else {
err = NotFound
}
C.free(unsafe.Pointer(c_response.result_list))
// free request memory
C.free(unsafe.Pointer(c_request.primary_key.data))
return GetError(err), data_list
}
// 查询接口（按index key查）
func searchByIndexKey(table *Table,
index_condition_list []IndexCondition,
start_timestamp int64,
end_timestamp int64,
limit int32,
need_index int,
need_data int) (error, []Result) {
var c_request C.mdt_search_request_t
var c_response C.mdt_search_response_t
// convert request
c_request.primary_key.size = 0
c_request.index_condition_list_len = C.size_t(len(index_condition_list))
c_index_condition_size := C.size_t(unsafe.Sizeof(C.mdt_index_condition_t{}))
c_index_condition_list_size := c_index_condition_size * c_request.index_condition_list_len
c_request.index_condition_list = (*C.mdt_index_condition_t)(C.malloc(c_index_condition_list_size))
c_index_condition_list := (*[1 << 30]C.mdt_index_condition_t)(unsafe.Pointer(c_request.index_condition_list))
for i := C.size_t(0); i < c_request.index_condition_list_len; i++ {
c_index_condition := &c_index_condition_list[i]
index_condition := &index_condition_list[i]
c_index_condition.index_name.data = C.CString(index_condition.IndexName)
c_index_condition.index_name.size = C.size_t(len(index_condition.IndexName))
c_index_condition.comparator = index_condition.Comparator
c_index_condition.compare_value.data = C.CString(index_condition.CompareValue)
c_index_condition.compare_value.size = C.size_t(len(index_condition.CompareValue))
}
c_request.start_timestamp = C.int64_t(start_timestamp)
c_request.end_timestamp = C.int64_t(end_timestamp)
c_request.limit = C.int32_t(limit)
c_request.need_index = C.int(need_index)
c_request.need_data = C.int(need_data)
// invoke C api
C.mdt_search(table.rep, &c_request, &c_response, nil, nil)
// convert result & free result memory
err := Ok
var result_list []Result
c_result_list := (*[1 << 30]C.mdt_search_result_t)(unsafe.Pointer(c_response.result_list))
for i := C.size_t(0); i < c_response.result_list_len; i++ {
c_result := &c_result_list[i]
result := &Result{}
result.PrimaryKey = C.GoStringN(c_result.primary_key.data, C.int(c_result.primary_key.size))
C.free(unsafe.Pointer(c_result.primary_key.data))
c_index_list := (*[1 << 30]C.mdt_index_t)(unsafe.Pointer(c_result.index_list))
for j := C.size_t(0); j < c_result.index_list_len; j++ {
index := &Index{}
index.IndexName = C.GoStringN(c_index_list[j].index_name.data, C.int(c_index_list[j].index_name.size))
index.IndexKey = C.GoStringN(c_index_list[j].index_key.data, C.int(c_index_list[j].index_key.size))
result.IndexList = append(result.IndexList, *index)
C.free(unsafe.Pointer(c_index_list[j].index_name.data))
C.free(unsafe.Pointer(c_index_list[j].index_key.data))
}
C.free(unsafe.Pointer(c_result.index_list))
c_data_list := (*[1 << 30]C.mdt_slice_t)(unsafe.Pointer(c_result.data_list))
for j := C.size_t(0); j < c_result.data_list_len; j++ {
result.DataList = append(result.DataList, C.GoStringN(c_data_list[j].data, C.int(c_data_list[j].size)))
C.free(unsafe.Pointer(c_data_list[j].data))
}
C.free(unsafe.Pointer(c_result.data_list))
result_list = append(result_list, *result)
}
C.free(unsafe.Pointer(c_response.result_list))
if result_list == nil {
err = NotFound
}
// free request memory
for i := C.size_t(0); i < c_request.index_condition_list_len; i++ {
c_index_condition := &c_index_condition_list[i]
C.free(unsafe.Pointer(c_index_condition.index_name.data))
C.free(unsafe.Pointer(c_index_condition.compare_value.data))
}
C.free(unsafe.Pointer(c_request.index_condition_list))
return GetError(err), result_list
}
