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clickhouse: added trimming to reinterpretAsString [#CONV-6318].

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This commit is contained in:
Michael Kolupaev 2012-12-26 15:12:42 +00:00
parent c444d5400a
commit ecfd5a1320
1 changed files with 17 additions and 8 deletions
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25
dbms/include/DB/Functions/FunctionsReinterpret.h
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@ -61,22 +61,31 @@ public:
size_t size = vec_from.size();
data_to.resize(size * (sizeof(T) + 1));
offsets_to.resize(size);
WriteBufferFromVector<UInt8> write_buffer(data_to);
int pos = 0;
for (size_t i = 0; i < size; ++i)
{
writePODBinary<T>(vec_from[i], write_buffer);
writeChar(0, write_buffer);
offsets_to[i] = write_buffer.count();
memcpy(&data_to[pos], &vec_from[i], sizeof(T));
int len = sizeof(T);
while (len > 0 && data_to[pos + len - 1] == '\0')
--len;
pos += len;
data_to[pos++] = '\0';
offsets_to[i] = pos;
}
data_to.resize(write_buffer.count());
data_to.resize(pos);
}
else if (const ColumnConst<T> * col_from = dynamic_cast<const ColumnConst<T> *>(&*block.getByPosition(arguments[0]).column))
{
std::string res(reinterpret_cast<const char *>(&col_from->getData()), sizeof(T));
while (!res.empty() && res[res.length() - 1] == '\0')
res.erase(res.end() - 1);
block.getByPosition(result).column =
new ColumnConstString(col_from->size(),
std::string(reinterpret_cast<const char *>(&col_from->getData()), sizeof(T)));
new ColumnConstString(col_from->size(), res);
}
else
{