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133 lines
3.9 KiB
C++
133 lines
3.9 KiB
C++
#include <Functions/IFunctionImpl.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionHelpers.h>
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#include <DataTypes/DataTypeTuple.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Columns/ColumnConst.h>
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#include <Columns/ColumnTuple.h>
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#include <Columns/ColumnSet.h>
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#include <Interpreters/Set.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_COLUMN;
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}
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/** in(x, set) - function for evaluating the IN
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* notIn(x, set) - and NOT IN.
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*/
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template <bool negative, bool global>
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struct FunctionInName;
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template <>
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struct FunctionInName<false, false>
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{
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static constexpr auto name = "in";
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};
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template <>
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struct FunctionInName<false, true>
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{
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static constexpr auto name = "globalIn";
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};
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template <>
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struct FunctionInName<true, false>
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{
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static constexpr auto name = "notIn";
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};
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template <>
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struct FunctionInName<true, true>
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{
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static constexpr auto name = "globalNotIn";
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};
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template <bool negative, bool global>
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class FunctionIn : public IFunction
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{
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public:
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static constexpr auto name = FunctionInName<negative, global>::name;
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static FunctionPtr create(const Context &)
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{
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return std::make_shared<FunctionIn>();
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}
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String getName() const override
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{
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return name;
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}
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size_t getNumberOfArguments() const override
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{
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return 2;
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}
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DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
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{
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return std::make_shared<DataTypeUInt8>();
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}
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bool useDefaultImplementationForConstants() const override { return true; }
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result, size_t /*input_rows_count*/) override
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{
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/// NOTE: after updating this code, check that FunctionIgnoreExceptNull returns the same type of column.
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/// Second argument must be ColumnSet.
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ColumnPtr column_set_ptr = block.getByPosition(arguments[1]).column;
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const ColumnSet * column_set = checkAndGetColumnConstData<const ColumnSet>(column_set_ptr.get());
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if (!column_set)
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column_set = checkAndGetColumn<const ColumnSet>(column_set_ptr.get());
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if (!column_set)
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throw Exception("Second argument for function '" + getName() + "' must be Set; found " + column_set_ptr->getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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Block block_of_key_columns;
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/// First argument may be a tuple or a single column.
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const ColumnWithTypeAndName & left_arg = block.getByPosition(arguments[0]);
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const ColumnTuple * tuple = typeid_cast<const ColumnTuple *>(left_arg.column.get());
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const ColumnConst * const_tuple = checkAndGetColumnConst<ColumnTuple>(left_arg.column.get());
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const DataTypeTuple * type_tuple = typeid_cast<const DataTypeTuple *>(left_arg.type.get());
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ColumnPtr materialized_tuple;
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if (const_tuple)
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{
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materialized_tuple = const_tuple->convertToFullColumn();
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tuple = typeid_cast<const ColumnTuple *>(materialized_tuple.get());
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}
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auto set = column_set->getData();
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auto set_types = set->getDataTypes();
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if (tuple && (set_types.size() != 1 || !set_types[0]->equals(*type_tuple)))
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{
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const auto & tuple_columns = tuple->getColumns();
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const DataTypes & tuple_types = type_tuple->getElements();
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size_t tuple_size = tuple_columns.size();
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for (size_t i = 0; i < tuple_size; ++i)
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block_of_key_columns.insert({ tuple_columns[i], tuple_types[i], "" });
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}
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else
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block_of_key_columns.insert(left_arg);
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block.getByPosition(result).column = set->execute(block_of_key_columns, negative);
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}
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};
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void registerFunctionsIn(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionIn<false, false>>();
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factory.registerFunction<FunctionIn<false, true>>();
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factory.registerFunction<FunctionIn<true, false>>();
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factory.registerFunction<FunctionIn<true, true>>();
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}
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}
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