mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 21:42:39 +00:00
119 lines
3.8 KiB
C++
119 lines
3.8 KiB
C++
#include <Columns/ColumnString.h>
|
|
#include <DataTypes/DataTypeString.h>
|
|
#include <Functions/FunctionFactory.h>
|
|
#include <Functions/FunctionHelpers.h>
|
|
#include <Functions/IFunction.h>
|
|
#include <Functions/Lemmatizers.cpp>
|
|
#include <Interpreters/Context.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int ILLEGAL_COLUMN;
|
|
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
struct LemmatizeImpl
|
|
{
|
|
static void vector(
|
|
const ColumnString::Chars & data,
|
|
const ColumnString::Offsets & offsets,
|
|
ColumnString::Chars & res_data,
|
|
ColumnString::Offsets & res_offsets,
|
|
Lemmatizers::LemmPtr & lemmatizer)
|
|
{
|
|
res_data.resize(data.size());
|
|
res_offsets.assign(offsets);
|
|
|
|
UInt64 data_size = 0;
|
|
for (UInt64 i = 0; i < offsets.size(); ++i)
|
|
{
|
|
/// lemmatize() is based on fact that string ends with '\0'
|
|
auto result = lemmatizer->lemmatize(reinterpret_cast<const char *>(data.data() + offsets[i - 1]));
|
|
size_t new_size = strlen(result.get()) + 1;
|
|
|
|
if (data_size + new_size > res_data.size())
|
|
res_data.resize(data_size + new_size);
|
|
|
|
memcpy(res_data.data() + data_size, reinterpret_cast<const unsigned char *>(result.get()), new_size);
|
|
|
|
data_size += new_size;
|
|
res_offsets[i] = data_size;
|
|
}
|
|
res_data.resize(data_size);
|
|
}
|
|
};
|
|
|
|
|
|
class FunctionLemmatize : public IFunction
|
|
{
|
|
public:
|
|
static constexpr auto name = "lemmatize";
|
|
static FunctionPtr create(ContextPtr context) {
|
|
return std::make_shared<FunctionLemmatize>(context->getLemmatizers());
|
|
}
|
|
|
|
private:
|
|
Lemmatizers & lemmatizers;
|
|
|
|
public:
|
|
FunctionLemmatize(Lemmatizers & lemmatizers_)
|
|
: lemmatizers(lemmatizers_) {}
|
|
|
|
String getName() const override { return name; }
|
|
|
|
size_t getNumberOfArguments() const override { return 2; }
|
|
|
|
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
|
|
{
|
|
if (!isString(arguments[0]))
|
|
throw Exception(
|
|
"Illegal type " + arguments[0]->getName() + " of argument of function " + getName(), ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
if (!isString(arguments[1]))
|
|
throw Exception(
|
|
"Illegal type " + arguments[1]->getName() + " of argument of function " + getName(), ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
|
return arguments[1];
|
|
}
|
|
|
|
bool useDefaultImplementationForConstants() const override { return true; }
|
|
|
|
ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {0}; }
|
|
|
|
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t) const override
|
|
{
|
|
const auto & langcolumn = arguments[0].column;
|
|
const auto & strcolumn = arguments[1].column;
|
|
|
|
const ColumnConst * lang_col = checkAndGetColumn<ColumnConst>(langcolumn.get());
|
|
const ColumnString * words_col = checkAndGetColumn<ColumnString>(strcolumn.get());
|
|
|
|
if (!lang_col)
|
|
throw Exception(
|
|
"Illegal column " + arguments[0].column->getName() + " of argument of function " + getName(), ErrorCodes::ILLEGAL_COLUMN);
|
|
if (!words_col)
|
|
throw Exception(
|
|
"Illegal column " + arguments[1].column->getName() + " of argument of function " + getName(), ErrorCodes::ILLEGAL_COLUMN);
|
|
|
|
String language = lang_col->getValue<String>();
|
|
auto lemmatizer = lemmatizers.getLemmatizer(language);
|
|
|
|
auto col_res = ColumnString::create();
|
|
LemmatizeImpl::vector(words_col->getChars(), words_col->getOffsets(), col_res->getChars(), col_res->getOffsets(), lemmatizer);
|
|
return col_res;
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
void registerFunctionLemmatize(FunctionFactory & factory)
|
|
{
|
|
factory.registerFunction<FunctionLemmatize>(FunctionFactory::CaseInsensitive);
|
|
}
|
|
|
|
}
|