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#include <Common/typeid_cast.h>
#include <Functions/FunctionHelpers.h>
#include <Interpreters/ExpressionActions.h>
#include <Interpreters/inplaceBlockConversions.h>
#include <Processors/Formats/IInputFormat.h>
#include <Processors/Transforms/AddingDefaultsTransform.h>
#include <Columns/ColumnsNumber.h>
#include <Columns/ColumnsCommon.h>
#include <Columns/ColumnDecimal.h>
#include <Columns/ColumnConst.h>
#include <Columns/FilterDescription.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypesDecimal.h>
#include <DataTypes/DataTypeDate.h>
#include <DataTypes/DataTypeDate32.h>
#include <DataTypes/DataTypeDateTime.h>
#include <DataTypes/DataTypeDateTime64.h>
#include <DataTypes/DataTypeEnum.h>
#include <DataTypes/DataTypeUUID.h>
#include <DataTypes/DataTypeIPv4andIPv6.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypeFixedString.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
extern const int SIZES_OF_COLUMNS_DOESNT_MATCH;
extern const int TYPE_MISMATCH;
}
static void checkCalculated(const ColumnWithTypeAndName & col_read,
const ColumnWithTypeAndName & col_defaults,
size_t defaults_needed)
{
size_t column_size = col_read.column->size();
if (column_size != col_defaults.column->size())
throw Exception(ErrorCodes::SIZES_OF_COLUMNS_DOESNT_MATCH, "Mismatch column sizes while adding defaults");
if (column_size < defaults_needed)
throw Exception(ErrorCodes::SIZES_OF_COLUMNS_DOESNT_MATCH, "Unexpected defaults count");
if (!col_read.type->equals(*col_defaults.type))
throw Exception(ErrorCodes::TYPE_MISMATCH, "Mismatch column types while adding defaults");
}
static void mixNumberColumns(
TypeIndex type_idx,
MutableColumnPtr & column_mixed,
const ColumnPtr & col_defaults,
const BlockMissingValues::RowsBitMask & defaults_mask)
{
auto call = [&](const auto & types)
{
using Types = std::decay_t<decltype(types)>;
using DataType = typename Types::LeftType;
if constexpr (!std::is_same_v<DataType, DataTypeString> && !std::is_same_v<DataType, DataTypeFixedString>)
{
using FieldType = typename DataType::FieldType;
using ColVecType = ColumnVectorOrDecimal<FieldType>;
auto col_read = typeid_cast<ColVecType *>(column_mixed.get());
if (!col_read)
return false;
typename ColVecType::Container & dst = col_read->getData();
if (auto const_col_defs = checkAndGetColumnConst<ColVecType>(col_defaults.get()))
{
FieldType value = checkAndGetColumn<ColVecType>(const_col_defs->getDataColumnPtr().get())->getData()[0];
for (size_t i = 0; i < defaults_mask.size(); ++i)
if (defaults_mask[i])
dst[i] = value;
return true;
}
else if (auto col_defs = checkAndGetColumn<ColVecType>(col_defaults.get()))
{
auto & src = col_defs->getData();
for (size_t i = 0; i < defaults_mask.size(); ++i)
if (defaults_mask[i])
dst[i] = src[i];
return true;
}
}
return false;
};
if (!callOnIndexAndDataType<void>(type_idx, call))
throw Exception(ErrorCodes::LOGICAL_ERROR, "Unexpected type on mixNumberColumns");
}
static MutableColumnPtr mixColumns(const ColumnWithTypeAndName & col_read,
const ColumnWithTypeAndName & col_defaults,
const BlockMissingValues::RowsBitMask & defaults_mask)
{
size_t column_size = col_read.column->size();
size_t defaults_needed = defaults_mask.size();
MutableColumnPtr column_mixed = col_read.column->cloneEmpty();
for (size_t i = 0; i < defaults_needed; ++i)
{
if (defaults_mask[i])
{
if (isColumnConst(*col_defaults.column))
column_mixed->insert((*col_defaults.column)[i]);
else
column_mixed->insertFrom(*col_defaults.column, i);
}
else
column_mixed->insertFrom(*col_read.column, i);
}
for (size_t i = defaults_needed; i < column_size; ++i)
column_mixed->insertFrom(*col_read.column, i);
return column_mixed;
}
AddingDefaultsTransform::AddingDefaultsTransform(
const Block & header,
const ColumnsDescription & columns_,
IInputFormat & input_format_,
ContextPtr context_)
: ISimpleTransform(header, header, true)
, columns(columns_)
, column_defaults(columns.getDefaults())
, input_format(input_format_)
, context(context_)
{
}
void AddingDefaultsTransform::transform(Chunk & chunk)
{
if (column_defaults.empty())
return;
const BlockMissingValues & block_missing_values = input_format.getMissingValues();
if (block_missing_values.empty())
return;
const auto & header = getOutputPort().getHeader();
size_t num_rows = chunk.getNumRows();
auto res = header.cloneWithColumns(chunk.detachColumns());
/// res block already has all columns values, with default value for type
/// (not value specified in table). We identify which columns we need to
/// recalculate with help of block_missing_values.
Block evaluate_block{res};
/// remove columns for recalculation
for (const auto & column : column_defaults)
{
if (evaluate_block.has(column.first))
{
size_t column_idx = res.getPositionByName(column.first);
if (block_missing_values.hasDefaultBits(column_idx))
evaluate_block.erase(column.first);
}
}
if (!evaluate_block.columns())
evaluate_block.insert({ColumnConst::create(ColumnUInt8::create(1, 0), num_rows), std::make_shared<DataTypeUInt8>(), "_dummy"});
auto dag = evaluateMissingDefaults(evaluate_block, header.getNamesAndTypesList(), columns, context, false);
if (dag)
{
auto actions = std::make_shared<ExpressionActions>(std::move(dag), ExpressionActionsSettings::fromContext(context, CompileExpressions::yes));
actions->execute(evaluate_block);
}
std::unordered_map<size_t, MutableColumnPtr> mixed_columns;
for (const ColumnWithTypeAndName & column_def : evaluate_block)
{
const String & column_name = column_def.name;
if (!column_defaults.contains(column_name) || !res.has(column_name))
continue;
size_t block_column_position = res.getPositionByName(column_name);
ColumnWithTypeAndName & column_read = res.getByPosition(block_column_position);
const auto & defaults_mask = block_missing_values.getDefaultsBitmask(block_column_position);
checkCalculated(column_read, column_def, defaults_mask.size());
if (!defaults_mask.empty())
{
/// TODO: FixedString
if (isColumnedAsNumber(column_read.type) || isDecimal(column_read.type))
{
MutableColumnPtr column_mixed = IColumn::mutate(std::move(column_read.column));
mixNumberColumns(column_read.type->getTypeId(), column_mixed, column_def.column, defaults_mask);
column_read.column = std::move(column_mixed);
}
else
{
MutableColumnPtr column_mixed = mixColumns(column_read, column_def, defaults_mask);
mixed_columns.emplace(block_column_position, std::move(column_mixed));
}
}
}
if (!mixed_columns.empty())
{
/// replace columns saving block structure
MutableColumns mutation = res.mutateColumns();
for (size_t position = 0; position < mutation.size(); ++position)
{
auto it = mixed_columns.find(position);
if (it != mixed_columns.end())
mutation[position] = std::move(it->second);
}
res.setColumns(std::move(mutation));
}
chunk.setColumns(res.getColumns(), num_rows);
}
}
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