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#pragma once
#include <yql/essentials/core/expr_nodes/yql_expr_nodes.h>
#include <yql/essentials/core/yql_node_transform.h>
#include <yql/essentials/core/yql_window_frame_setting_bound.h>
#include <yql/essentials/core/sql_types/window_frames_collector_params.h>
#include <yql/essentials/core/sql_types/window_number_and_direction.h>
#include <yql/essentials/core/sql_types/sort_order.h>
#include <yql/essentials/core/yql_range_frame_collector_bounds.h>
#include <utility>
namespace NYql {
enum EFrameType {
FrameByRows,
FrameByRange,
FrameByGroups,
};
enum class EFrameBoundsType: ui8 {
EMPTY,
LAGGING,
CURRENT,
LEADING,
FULL,
GENERIC,
};
enum class EFrameBoundsNewType: ui8 {
EMPTY,
INCREMENTAL,
FULL,
GENERIC,
};
class TWindowFrameSettings {
public:
using TRowFrame = std::pair<TMaybe<i32>, TMaybe<i32>>;
class TRangeFrame {
public:
using ESortOrder = NYql::ESortOrder;
using TFrameBoundType = NYql::NWindow::TNumberAndDirection<TExprNode::TPtr>;
TRangeFrame(std::pair<TWindowFrameSettingBound, TWindowFrameSettingBound> frame, bool isNumeric, ESortOrder sortOrder, bool isRightCurrentRow)
: Frame_(std::move(frame))
, IsNumeric_(isNumeric)
, SortOrder_(sortOrder)
, IsRightCurrentRow_(isRightCurrentRow)
{
}
const TWindowFrameSettingBound& GetFirst() const {
return Frame_.first;
}
const TWindowFrameSettingBound& GetLast() const {
return Frame_.second;
}
bool IsNumeric() const {
return IsNumeric_;
}
ESortOrder GetSortOrder() const {
return SortOrder_;
}
bool IsRightCurrentRow() const {
return IsRightCurrentRow_;
}
private:
std::pair<TWindowFrameSettingBound, TWindowFrameSettingBound> Frame_;
bool IsNumeric_;
ESortOrder SortOrder_;
bool IsRightCurrentRow_;
};
using TGroupsFrame = std::monostate;
using TFrame = std::variant<TRowFrame, TRangeFrame, TGroupsFrame>;
TWindowFrameSettings(TFrame frameBounds, bool neverEmpty, bool compact, bool isAlwaysEmpty);
static TWindowFrameSettings Parse(const TExprNode& node, TExprContext& ctx);
static TMaybe<TWindowFrameSettings> TryParse(const TExprNode& node, TExprContext& ctx, bool& isUniversal);
static TExprNode::TPtr GetSortSpec(const TExprNode& node, TExprContext& ctx);
bool IsNonEmpty() const {
return NeverEmpty_;
}
bool IsCompact() const {
return Compact_;
}
bool IsAlwaysEmpty() const {
return IsAlwaysEmpty_;
}
EFrameType GetFrameType() const;
bool IsFullPartition() const;
const TRowFrame& GetRowFrame() const {
YQL_ENSURE(GetFrameType() == FrameByRows);
return std::get<TRowFrame>(FrameBounds_);
}
const TRangeFrame& GetRangeFrame() const {
YQL_ENSURE(GetFrameType() == FrameByRange);
return std::get<TRangeFrame>(FrameBounds_);
}
const TGroupsFrame& GetGroupsFrame() const {
YQL_ENSURE(GetFrameType() == FrameByGroups);
return std::get<TGroupsFrame>(FrameBounds_);
}
bool IsLeftInf() const;
bool IsRightInf() const;
bool IsRightCurrent() const;
private:
TFrame FrameBounds_;
bool NeverEmpty_ = false;
bool Compact_ = false;
bool IsAlwaysEmpty_ = false;
};
using TExprNodeNumberAndDirection = TWindowFrameSettings::TRangeFrame::TFrameBoundType;
using TRangeFrameCollectorBounds = NWindow::TRangeFrameCollectorBounds;
using TExprNodeCoreWinFrameCollectorParams = NWindow::TCoreWinFramesCollectorParams<TWindowFrameSettingWithOffset, /*WithSortedColumnNames=*/true>;
bool CheckRowFrameIsAlwaysEmpty(const TWindowFrameSettings::TRowFrame& frame);
EFrameBoundsNewType GetFrameTypeNew(const TWindowFrameSettings& frameSettings);
} // namespace NYql
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