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#include <Analyzer/WindowNode.h>
#include <Common/SipHash.h>
#include <IO/WriteBufferFromString.h>
#include <IO/Operators.h>
#include <Parsers/ASTWindowDefinition.h>
namespace DB
{
WindowNode::WindowNode(WindowFrame window_frame_)
: IQueryTreeNode(children_size)
, window_frame(std::move(window_frame_))
{
children[partition_by_child_index] = std::make_shared<ListNode>();
children[order_by_child_index] = std::make_shared<ListNode>();
}
void WindowNode::dumpTreeImpl(WriteBuffer & buffer, FormatState & format_state, size_t indent) const
{
buffer << std::string(indent, ' ') << "WINDOW id: " << format_state.getNodeId(this);
if (hasAlias())
buffer << ", alias: " << getAlias();
if (!parent_window_name.empty())
buffer << ", parent_window_name: " << parent_window_name;
buffer << ", frame_type: " << window_frame.type;
auto window_frame_bound_type_to_string = [](WindowFrame::BoundaryType boundary_type, bool boundary_preceding)
{
std::string value;
if (boundary_type == WindowFrame::BoundaryType::Unbounded)
value = "unbounded";
else if (boundary_type == WindowFrame::BoundaryType::Current)
value = "current";
else if (boundary_type == WindowFrame::BoundaryType::Offset)
value = "offset";
if (boundary_type != WindowFrame::BoundaryType::Current)
{
if (boundary_preceding)
value += " preceding";
else
value += " following";
}
return value;
};
buffer << ", frame_begin_type: " << window_frame_bound_type_to_string(window_frame.begin_type, window_frame.begin_preceding);
buffer << ", frame_end_type: " << window_frame_bound_type_to_string(window_frame.end_type, window_frame.end_preceding);
if (hasPartitionBy())
{
buffer << '\n' << std::string(indent + 2, ' ') << "PARTITION BY\n";
getPartitionBy().dumpTreeImpl(buffer, format_state, indent + 4);
}
if (hasOrderBy())
{
buffer << '\n' << std::string(indent + 2, ' ') << "ORDER BY\n";
getOrderBy().dumpTreeImpl(buffer, format_state, indent + 4);
}
if (hasFrameBeginOffset())
{
buffer << '\n' << std::string(indent + 2, ' ') << "FRAME BEGIN OFFSET\n";
getFrameBeginOffsetNode()->dumpTreeImpl(buffer, format_state, indent + 4);
}
if (hasFrameEndOffset())
{
buffer << '\n' << std::string(indent + 2, ' ') << "FRAME END OFFSET\n";
getFrameEndOffsetNode()->dumpTreeImpl(buffer, format_state, indent + 4);
}
}
bool WindowNode::isEqualImpl(const IQueryTreeNode & rhs) const
{
const auto & rhs_typed = assert_cast<const WindowNode &>(rhs);
return window_frame == rhs_typed.window_frame && parent_window_name == rhs_typed.parent_window_name;
}
void WindowNode::updateTreeHashImpl(HashState & hash_state) const
{
hash_state.update(window_frame.is_default);
hash_state.update(window_frame.type);
hash_state.update(window_frame.begin_type);
hash_state.update(window_frame.begin_preceding);
hash_state.update(window_frame.end_type);
hash_state.update(window_frame.end_preceding);
hash_state.update(parent_window_name);
}
QueryTreeNodePtr WindowNode::cloneImpl() const
{
auto window_node = std::make_shared<WindowNode>(window_frame);
window_node->parent_window_name = parent_window_name;
return window_node;
}
ASTPtr WindowNode::toASTImpl(const ConvertToASTOptions & options) const
{
auto window_definition = std::make_shared<ASTWindowDefinition>();
window_definition->parent_window_name = parent_window_name;
if (hasPartitionBy())
{
window_definition->children.push_back(getPartitionByNode()->toAST(options));
window_definition->partition_by = window_definition->children.back();
}
if (hasOrderBy())
{
window_definition->children.push_back(getOrderByNode()->toAST(options));
window_definition->order_by = window_definition->children.back();
}
window_definition->frame_is_default = window_frame.is_default;
window_definition->frame_type = window_frame.type;
window_definition->frame_begin_type = window_frame.begin_type;
window_definition->frame_begin_preceding = window_frame.begin_preceding;
if (hasFrameBeginOffset())
{
window_definition->children.push_back(getFrameBeginOffsetNode()->toAST(options));
window_definition->frame_begin_offset = window_definition->children.back();
}
window_definition->frame_end_type = window_frame.end_type;
window_definition->frame_end_preceding = window_frame.end_preceding;
if (hasFrameEndOffset())
{
window_definition->children.push_back(getFrameEndOffsetNode()->toAST(options));
window_definition->frame_end_offset = window_definition->children.back();
}
return window_definition;
}
}
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