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#include <Analyzer/SortNode.h>
#include <Common/assert_cast.h>
#include <Common/SipHash.h>
#include <IO/WriteBufferFromString.h>
#include <IO/Operators.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTOrderByElement.h>
#include <Parsers/ASTLiteral.h>
namespace DB
{
const char * toString(SortDirection sort_direction)
{
switch (sort_direction)
{
case SortDirection::ASCENDING: return "ASCENDING";
case SortDirection::DESCENDING: return "DESCENDING";
}
}
SortNode::SortNode(QueryTreeNodePtr expression_,
SortDirection sort_direction_,
std::optional<SortDirection> nulls_sort_direction_,
std::shared_ptr<Collator> collator_,
bool with_fill_)
: IQueryTreeNode(children_size)
, sort_direction(sort_direction_)
, nulls_sort_direction(nulls_sort_direction_)
, collator(std::move(collator_))
, with_fill(with_fill_)
{
children[sort_expression_child_index] = std::move(expression_);
}
void SortNode::dumpTreeImpl(WriteBuffer & buffer, FormatState & format_state, size_t indent) const
{
buffer << std::string(indent, ' ') << "SORT id: " << format_state.getNodeId(this);
buffer << ", sort_direction: " << toString(sort_direction);
if (nulls_sort_direction)
buffer << ", nulls_sort_direction: " << toString(*nulls_sort_direction);
if (collator)
buffer << ", collator: " << collator->getLocale();
buffer << ", with_fill: " << with_fill;
buffer << '\n' << std::string(indent + 2, ' ') << "EXPRESSION\n";
getExpression()->dumpTreeImpl(buffer, format_state, indent + 4);
if (hasFillFrom())
{
buffer << '\n' << std::string(indent + 2, ' ') << "FILL FROM\n";
getFillFrom()->dumpTreeImpl(buffer, format_state, indent + 4);
}
if (hasFillTo())
{
buffer << '\n' << std::string(indent + 2, ' ') << "FILL TO\n";
getFillTo()->dumpTreeImpl(buffer, format_state, indent + 4);
}
if (hasFillStep())
{
buffer << '\n' << std::string(indent + 2, ' ') << "FILL STEP\n";
getFillStep()->dumpTreeImpl(buffer, format_state, indent + 4);
}
}
bool SortNode::isEqualImpl(const IQueryTreeNode & rhs) const
{
const auto & rhs_typed = assert_cast<const SortNode &>(rhs);
if (sort_direction != rhs_typed.sort_direction ||
nulls_sort_direction != rhs_typed.nulls_sort_direction ||
with_fill != rhs_typed.with_fill)
return false;
if (!collator && !rhs_typed.collator)
return true;
else if (collator && !rhs_typed.collator)
return false;
else if (!collator && rhs_typed.collator)
return false;
return collator->getLocale() == rhs_typed.collator->getLocale();
}
void SortNode::updateTreeHashImpl(HashState & hash_state) const
{
hash_state.update(sort_direction);
/// use some determined value if `nulls_sort_direction` is `nullopt`
hash_state.update(nulls_sort_direction.value_or(sort_direction));
hash_state.update(with_fill);
if (collator)
{
const auto & locale = collator->getLocale();
hash_state.update(locale.size());
hash_state.update(locale);
}
}
QueryTreeNodePtr SortNode::cloneImpl() const
{
return std::make_shared<SortNode>(nullptr /*expression*/, sort_direction, nulls_sort_direction, collator, with_fill);
}
ASTPtr SortNode::toASTImpl(const ConvertToASTOptions & options) const
{
auto result = std::make_shared<ASTOrderByElement>();
result->direction = sort_direction == SortDirection::ASCENDING ? 1 : -1;
result->nulls_direction = result->direction;
if (nulls_sort_direction)
result->nulls_direction = *nulls_sort_direction == SortDirection::ASCENDING ? 1 : -1;
result->nulls_direction_was_explicitly_specified = nulls_sort_direction.has_value();
result->with_fill = with_fill;
result->fill_from = hasFillFrom() ? getFillFrom()->toAST(options) : nullptr;
result->fill_to = hasFillTo() ? getFillTo()->toAST(options) : nullptr;
result->fill_step = hasFillStep() ? getFillStep()->toAST(options) : nullptr;
result->children.push_back(getExpression()->toAST(options));
if (collator)
{
result->children.push_back(std::make_shared<ASTLiteral>(Field(collator->getLocale())));
result->collation = result->children.back();
}
return result;
}
}
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