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#include "flat_page_label.h"
#include "flat_part_iface.h"
#include "flat_table_part.h"
#include "util_basics.h"
#include <ydb/core/util/pb.h>
#include <ydb/core/scheme/scheme_types_proto.h>
#include <ydb/core/tablet_flat/protos/flat_table_part.pb.h>
#include <library/cpp/containers/stack_vector/stack_vec.h>
#include <util/generic/map.h>
namespace NKikimr {
namespace NTable {
TPartScheme::TPartScheme(TArrayRef<const TColInfo> cols)
{
ui32 maxGroup = 0;
for (auto& col : cols) {
maxGroup = Max(maxGroup, col.Group);
}
ui32 pos = 0;
Groups.resize(size_t(maxGroup) + 1);
for (auto& col : cols) {
Groups[col.Group].Columns.push_back(col);
Groups[col.Group].Columns.back().Pos = pos++;
}
FillKeySlots();
FillHistoricSlots();
}
TIntrusiveConstPtr<TPartScheme> TPartScheme::Parse(TArrayRef<const char> raw, bool labeled)
{
if (labeled) {
/* New styled scheme blob prepended with generic TLabel data */
auto got = NPage::TLabelWrapper().Read(raw, NPage::EPage::Schem2);
// Version 1 may have non-zero group columns
Y_VERIFY(got.Version == 0 || got.Version == 1, "Unknown EPage::Schem2 version");
raw = got.Page;
}
TProtoBox<NProto::TPartScheme> proto(raw);
TMap<TTag, ui32> byTag;
TVector<TColInfo> cols;
for (size_t i = 0; i < proto.ColumnsSize(); i++) {
auto &one = proto.GetColumns(i);
cols.emplace_back();
cols.back().Tag = one.GetTag();
cols.back().TypeInfo = NScheme::TypeInfoModFromProtoColumnType(one.GetType(),
one.HasTypeInfo() ? &one.GetTypeInfo() : nullptr).TypeInfo;
cols.back().Pos = cols.size() - 1;
cols.back().Group = one.GetGroup();
if (one.HasKey())
cols.back().Key = one.GetKey();
byTag[one.GetTag()] = cols.back().Pos;
}
/* Compatability with legacy schemes */
for (size_t pos = 0; pos < proto.KeyTagsSize(); pos++) {
auto it = byTag.find(proto.GetKeyTags(pos));
Y_VERIFY(it != byTag.end(), "Cannot find key tag plain scheme");
cols[it->second].Key = pos;
}
return new TPartScheme(cols);
}
void TPartScheme::FillKeySlots()
{
for (auto& group : Groups) {
InitGroup(group);
for (const auto& col : group.Columns) {
AllColumns.push_back(col);
}
}
auto byPos = NTable::TColInfo::TByPos();
std::sort(AllColumns.begin(), AllColumns.end(), byPos);
for (auto& col : AllColumns) {
Tag2DataInfo[col.Tag] = &col;
}
}
void TPartScheme::FillHistoricSlots()
{
// Synthetic (rowid, step, txid) key used during history searches
TStackVec<NScheme::TTypeInfoOrder, 3> types;
types.emplace_back(NScheme::TTypeInfo(NScheme::NTypeIds::Uint64), NScheme::EOrder::Ascending);
types.emplace_back(NScheme::TTypeInfo(NScheme::NTypeIds::Uint64), NScheme::EOrder::Descending);
types.emplace_back(NScheme::TTypeInfo(NScheme::NTypeIds::Uint64), NScheme::EOrder::Descending);
TStackVec<TCell, 3> defs;
defs.resize(3);
HistoryKeys = TKeyCellDefaults::Make(types, defs);
// Synthetic (rowid, step, txid) key for the lead group of historic data
// Note that Tag/Pos are left unspecified, they should never be used
for (ui32 keyIdx = 0; keyIdx < HistoryKeys->Types.size(); ++keyIdx) {
auto& col = HistoryGroup.Columns.emplace_back();
col.Key = keyIdx;
col.TypeInfo = HistoryKeys->Types[keyIdx].ToTypeInfo();
}
// All non-key columns go after synthetic key
for (auto& col : Groups[0].Columns) {
if (!col.IsKey()) {
HistoryGroup.Columns.push_back(col);
}
}
InitGroup(HistoryGroup);
// The lead group of historic data has a different layout
HistoryColumns = AllColumns;
for (const auto& col : HistoryGroup.Columns) {
if (!col.IsKey()) {
HistoryColumns[col.Pos] = col;
}
}
// Remove incorrect key columns from history
for (auto& col : HistoryColumns) {
if (col.IsKey()) {
col = { };
}
}
}
void TPartScheme::InitGroup(TGroupInfo& group)
{
using namespace NPage;
group.FixedSize = InitInfo(group.Columns, TPgSizeOf<TDataPage::TItem>::Value);
for (auto& col : group.Columns) {
if (col.IsKey()) {
Y_VERIFY(col.Group == 0, "Key columns must be in the main column group");
group.ColsKeyData.push_back(col);
}
}
if (group.ColsKeyData) {
auto byKey = NTable::TColInfo::TByKey();
std::sort(group.ColsKeyData.begin(), group.ColsKeyData.end(), byKey);
for (auto& col : group.ColsKeyData) {
group.KeyTypes.push_back(col.TypeInfo);
}
group.ColsKeyIdx = group.ColsKeyData;
group.IdxRecFixedSize = InitInfo(group.ColsKeyIdx, TPgSizeOf<TIndex::TItem>::Value);
} else {
group.IdxRecFixedSize = 0;
}
}
size_t TPartScheme::InitInfo(TVector<TColumn>& cols, TPgSize headerSize)
{
size_t offset = 0;
for (auto &col: cols) {
const ui32 fixed = NScheme::GetFixedSize(col.TypeInfo);
col.Offset = offset;
col.IsFixed = fixed > 0;
col.FixedSize = fixed > 0 ? fixed : sizeof(NPage::TDataRef);
offset += col.FixedSize + headerSize;
}
return offset;
}
TSharedData TPartScheme::Serialize() const
{
NProto::TPartScheme proto;
for (const auto& col : AllColumns) {
auto* pb = proto.AddColumns();
pb->SetTag(col.Tag);
auto protoType = NScheme::ProtoColumnTypeFromTypeInfoMod(col.TypeInfo, "");
pb->SetType(protoType.TypeId);
if (protoType.TypeInfo) {
*pb->MutableTypeInfo() = *protoType.TypeInfo;
}
pb->SetGroup(col.Group);
if (col.IsKey()) {
pb->SetKey(col.Key);
}
}
TStringStream ss;
proto.SerializeToArcadiaStream(&ss);
return NPage::TLabelWrapper::Wrap(ss.Str(), EPage::Schem2, Groups.size() > 1 ? 1 : 0);
}
}}
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