mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 21:51:57 +00:00
130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
#include <Interpreters/FillingRow.h>
|
|
#include <Common/FieldVisitorsAccurateComparison.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
bool less(const Field & lhs, const Field & rhs, int direction)
|
|
{
|
|
if (direction == -1)
|
|
return applyVisitor(FieldVisitorAccurateLess(), rhs, lhs);
|
|
|
|
return applyVisitor(FieldVisitorAccurateLess(), lhs, rhs);
|
|
}
|
|
|
|
bool equals(const Field & lhs, const Field & rhs)
|
|
{
|
|
return applyVisitor(FieldVisitorAccurateEquals(), lhs, rhs);
|
|
}
|
|
|
|
|
|
FillingRow::FillingRow(const SortDescription & sort_description) : description(sort_description)
|
|
{
|
|
row.resize(description.size());
|
|
}
|
|
|
|
bool FillingRow::operator<(const FillingRow & other) const
|
|
{
|
|
for (size_t i = 0; i < size(); ++i)
|
|
{
|
|
if (row[i].isNull() || other[i].isNull() || equals(row[i], other[i]))
|
|
continue;
|
|
return less(row[i], other[i], getDirection(i));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool FillingRow::operator==(const FillingRow & other) const
|
|
{
|
|
for (size_t i = 0; i < size(); ++i)
|
|
if (!equals(row[i], other[i]))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
bool FillingRow::next(const FillingRow & to_row)
|
|
{
|
|
size_t pos = 0;
|
|
|
|
/// Find position we need to increment for generating next row.
|
|
for (; pos < row.size(); ++pos)
|
|
if (!row[pos].isNull() && !to_row[pos].isNull() && !equals(row[pos], to_row[pos]))
|
|
break;
|
|
|
|
if (pos == row.size() || less(to_row[pos], row[pos], getDirection(pos)))
|
|
return false;
|
|
|
|
/// If we have any 'fill_to' value at position greater than 'pos',
|
|
/// we need to generate rows up to 'fill_to' value.
|
|
for (size_t i = row.size() - 1; i > pos; --i)
|
|
{
|
|
if (getFillDescription(i).fill_to.isNull() || row[i].isNull())
|
|
continue;
|
|
|
|
auto next_value = row[i];
|
|
applyVisitor(FieldVisitorSum(getFillDescription(i).fill_step), next_value);
|
|
if (less(next_value, getFillDescription(i).fill_to, getDirection(i)))
|
|
{
|
|
row[i] = next_value;
|
|
initFromDefaults(i + 1);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
auto next_value = row[pos];
|
|
applyVisitor(FieldVisitorSum(getFillDescription(pos).fill_step), next_value);
|
|
|
|
if (less(to_row[pos], next_value, getDirection(pos)))
|
|
return false;
|
|
|
|
row[pos] = next_value;
|
|
if (equals(row[pos], to_row[pos]))
|
|
{
|
|
bool is_less = false;
|
|
for (size_t i = pos + 1; i < size(); ++i)
|
|
{
|
|
const auto & fill_from = getFillDescription(i).fill_from;
|
|
if (!fill_from.isNull())
|
|
row[i] = fill_from;
|
|
else
|
|
row[i] = to_row[i];
|
|
is_less |= less(row[i], to_row[i], getDirection(i));
|
|
}
|
|
|
|
return is_less;
|
|
}
|
|
|
|
initFromDefaults(pos + 1);
|
|
return true;
|
|
}
|
|
|
|
void FillingRow::initFromDefaults(size_t from_pos)
|
|
{
|
|
for (size_t i = from_pos; i < row.size(); ++i)
|
|
row[i] = getFillDescription(i).fill_from;
|
|
}
|
|
|
|
|
|
void insertFromFillingRow(MutableColumns & filling_columns, MutableColumns & other_columns, const FillingRow & filling_row)
|
|
{
|
|
for (size_t i = 0; i < filling_columns.size(); ++i)
|
|
{
|
|
if (filling_row[i].isNull())
|
|
filling_columns[i]->insertDefault();
|
|
else
|
|
filling_columns[i]->insert(filling_row[i]);
|
|
}
|
|
|
|
for (const auto & other_column : other_columns)
|
|
other_column->insertDefault();
|
|
}
|
|
|
|
void copyRowFromColumns(MutableColumns & dest, const Columns & source, size_t row_num)
|
|
{
|
|
for (size_t i = 0; i < source.size(); ++i)
|
|
dest[i]->insertFrom(*source[i], row_num);
|
|
}
|
|
|
|
}
|