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dbms: naive implementation of non-const array() function for now[#METR-17948]

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This commit is contained in:
Andrey Mironov 2015-09-08 12:38:35 +03:00
parent 43b0e8a46c
commit 0bcf25e518
1 changed files with 21 additions and 1 deletions
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22
dbms/include/DB/Functions/FunctionsArray.h
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@ -219,7 +219,27 @@ public:
};
}
else
throw Exception("Arguments for function array must be constant.", ErrorCodes::ILLEGAL_COLUMN);
{
auto out = new ColumnArray{result_type->createColumn()};
ColumnPtr out_ptr{out};
for (const auto row_num : ext::range(0, first_arg.column->size()))
{
Array arr;
for (const auto arg_num : arguments)
if (block.getByPosition(arg_num).type->getName() == result_type->getName())
/// Если элемент такого же типа как результат, просто добавляем его в ответ
arr.push_back((*block.getByPosition(arg_num).column)[row_num]);
else
/// Иначе необходимо привести его к типу результата
addField(result_type, (*block.getByPosition(arg_num).column)[row_num], arr);
out->insert(arr);
}
block.getByPosition(result).column = out_ptr;
}
}
};