2021-05-17 07:30:42 +00:00
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#include <Functions/IFunction.h>
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2018-09-08 22:04:39 +00:00
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#include <Functions/FunctionFactory.h>
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypesNumber.h>
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2018-09-08 22:57:56 +00:00
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#include <atomic>
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2018-09-08 22:04:39 +00:00
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namespace DB
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{
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2020-09-07 18:00:37 +00:00
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namespace
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{
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2018-09-08 22:04:39 +00:00
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2020-10-14 14:04:50 +00:00
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/** Incremental number of row within all columnss passed to this function. */
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2018-09-08 22:04:39 +00:00
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class FunctionRowNumberInAllBlocks : public IFunction
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{
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private:
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2020-07-21 13:58:07 +00:00
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mutable std::atomic<size_t> rows{0};
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2018-09-08 22:04:39 +00:00
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public:
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static constexpr auto name = "rowNumberInAllBlocks";
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2021-06-01 12:20:52 +00:00
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static FunctionPtr create(ContextPtr)
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2018-09-08 22:04:39 +00:00
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{
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return std::make_shared<FunctionRowNumberInAllBlocks>();
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}
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/// Get the name of the function.
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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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2019-01-30 02:47:26 +00:00
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bool isStateful() const override
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{
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return true;
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}
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2018-09-08 22:04:39 +00:00
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size_t getNumberOfArguments() const override
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{
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return 0;
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}
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bool isDeterministic() const override { return false; }
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bool isDeterministicInScopeOfQuery() const override
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{
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return false;
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}
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2021-06-22 16:21:23 +00:00
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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2021-04-29 14:48:26 +00:00
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2018-09-08 22:04:39 +00:00
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DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
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{
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return std::make_shared<DataTypeUInt64>();
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}
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2020-11-17 13:24:45 +00:00
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ColumnPtr executeImplDryRun(const ColumnsWithTypeAndName &, const DataTypePtr &, size_t input_rows_count) const override
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2018-12-02 11:00:23 +00:00
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{
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2020-10-19 15:27:41 +00:00
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return ColumnUInt64::create(input_rows_count);
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2018-12-02 11:00:23 +00:00
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}
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2020-11-17 13:24:45 +00:00
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ColumnPtr executeImpl(const ColumnsWithTypeAndName &, const DataTypePtr &, size_t input_rows_count) const override
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2018-09-08 22:04:39 +00:00
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{
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size_t current_row_number = rows.fetch_add(input_rows_count);
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auto column = ColumnUInt64::create();
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auto & data = column->getData();
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data.resize(input_rows_count);
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for (size_t i = 0; i < input_rows_count; ++i)
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data[i] = current_row_number + i;
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2020-10-19 15:27:41 +00:00
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return column;
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2018-09-08 22:04:39 +00:00
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}
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};
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2020-09-07 18:00:37 +00:00
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}
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2018-09-08 22:04:39 +00:00
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void registerFunctionRowNumberInAllBlocks(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionRowNumberInAllBlocks>();
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}
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}
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