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dbms: Server: Feature development. [#METR-19266]

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This commit is contained in:
Alexey Arno 2016-07-06 13:36:58 +03:00
parent f52403f623
commit 4ff528140a
3 changed files with 34 additions and 6 deletions
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5
dbms/include/DB/Functions/FunctionsMiscellaneous.h
View File

@ -171,6 +171,11 @@ public:
return name;
}
bool hasSpecialSupportForNullValues() const override
{
return true;
}
/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{

32
dbms/src/DataStreams/PrettyBlockOutputStream.cpp
View File

@ -2,8 +2,9 @@
#include <unistd.h>
#include <DB/Functions/FunctionsMiscellaneous.h>
#include <DB/DataStreams/PrettyBlockOutputStream.h>
#include <DB/Columns/ColumnNullable.h>
#include <DB/DataTypes/NullSymbol.h>
namespace DB
@ -46,20 +47,39 @@ void PrettyBlockOutputStream::calculateWidths(Block & block, Widths_t & max_widt
column.column = block.getByPosition(i + columns).column;
if (const ColumnUInt64 * col = typeid_cast<const ColumnUInt64 *>(&*column.column))
IColumn * observed_col;
if (column.column.get()->isNullable())
{
ColumnNullable & nullable_col = static_cast<ColumnNullable &>(*(column.column.get()));
observed_col = nullable_col.getNestedColumn().get();
}
else
observed_col = column.column.get();
if (const ColumnUInt64 * col = typeid_cast<const ColumnUInt64 *>(observed_col))
{
const ColumnUInt64::Container_t & res = col->getData();
for (size_t j = 0; j < rows; ++j)
if (res[j] > max_widths[i])
max_widths[i] = res[j];
{
Field f = (*(block.getByPosition(columns + i).column))[j];
size_t cur_width;
if (f.isNull())
cur_width = NullSymbol::Escaped::length;
else
cur_width = res[j];
if (cur_width > max_widths[i])
max_widths[i] = cur_width;
}
else if (const ColumnConstUInt64 * col = typeid_cast<const ColumnConstUInt64 *>(&*column.column))
}
else if (const ColumnConstUInt64 * col = typeid_cast<const ColumnConstUInt64 *>(observed_col))
{
UInt64 res = col->getData();
max_widths[i] = res;
}
else
throw Exception("Illegal column " + column.column->getName()
throw Exception("Illegal column " + observed_col->getName()
+ " of result of function " + visible_width_func.getName(),
ErrorCodes::ILLEGAL_COLUMN);

3
dbms/src/Functions/FunctionsMiscellaneous.cpp
View File

@ -4,6 +4,7 @@
#include <DB/Functions/FunctionsArithmetic.h>
#include <DB/Functions/FunctionsMiscellaneous.h>
#include <DB/DataTypes/DataTypeEnum.h>
#include <DB/Columns/ColumnNull.h>
#include <ext/enumerate.hpp>
@ -368,6 +369,8 @@ void FunctionVisibleWidth::executeImpl(Block & block, const ColumnNumbers & argu
*/
block.getByPosition(result).column = std::make_shared<ColumnConstUInt64>(rows, 10);
}
else if (typeid_cast<const ColumnNull *>(&*column) != nullptr)
block.getByPosition(result).column = std::make_shared<ColumnConstUInt64>(rows, strlen_constexpr("NULL"));
else
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
+ " of argument of function " + getName(),