2018-11-10 20:09:07 +00:00
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#pragma once
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2019-03-03 20:08:39 +00:00
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#include <Common/memcmpSmall.h>
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2018-09-09 23:47:56 +00:00
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#include <Columns/ColumnString.h>
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2018-09-09 23:36:06 +00:00
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#include <Functions/FunctionFactory.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 LOGICAL_ERROR;
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}
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template <bool negative = false>
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struct EmptyImpl
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{
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/// If the function will return constant value for FixedString data type.
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static constexpr auto is_fixed_to_constant = false;
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2018-11-25 00:08:50 +00:00
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static void vector(const ColumnString::Chars & /*data*/, const ColumnString::Offsets & offsets, PaddedPODArray<UInt8> & res)
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2018-09-09 23:36:06 +00:00
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{
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size_t size = offsets.size();
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ColumnString::Offset prev_offset = 1;
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for (size_t i = 0; i < size; ++i)
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{
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res[i] = negative ^ (offsets[i] == prev_offset);
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prev_offset = offsets[i] + 1;
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}
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}
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/// Only make sense if is_fixed_to_constant.
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2020-03-23 02:12:31 +00:00
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static void vectorFixedToConstant(const ColumnString::Chars & /*data*/, size_t /*n*/, UInt8 & /*res*/)
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2018-09-09 23:36:06 +00:00
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{
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2020-03-23 02:12:31 +00:00
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throw Exception("Logical error: 'vectorFixedToConstant method' is called", ErrorCodes::LOGICAL_ERROR);
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2018-09-09 23:36:06 +00:00
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}
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2020-03-23 02:12:31 +00:00
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static void vectorFixedToVector(const ColumnString::Chars & data, size_t n, PaddedPODArray<UInt8> & res)
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2018-09-09 23:36:06 +00:00
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{
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2019-03-04 15:50:23 +00:00
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size_t size = data.size() / n;
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for (size_t i = 0; i < size; ++i)
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res[i] = negative ^ memoryIsZeroSmallAllowOverflow15(data.data() + i * n, n);
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2018-09-09 23:36:06 +00:00
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}
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static void array(const ColumnString::Offsets & offsets, PaddedPODArray<UInt8> & res)
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{
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size_t size = offsets.size();
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ColumnString::Offset prev_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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res[i] = negative ^ (offsets[i] == prev_offset);
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prev_offset = offsets[i];
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}
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}
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2021-07-04 14:26:09 +00:00
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static void uuid(const ColumnUUID::Container & container, size_t n, PaddedPODArray<UInt8> & res)
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{
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for (size_t i = 0; i < n; ++i)
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2021-11-26 14:39:03 +00:00
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res[i] = negative ^ (container[i].toUnderType() == 0);
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2021-07-04 14:26:09 +00:00
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}
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2018-09-09 23:36:06 +00:00
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};
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}
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