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Serialization of sort description.

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This commit is contained in:
Nikolai Kochetov 2024-08-30 16:52:42 +00:00
parent 65ef7e7440
commit 1ed4e1b847
2 changed files with 66 additions and 0 deletions
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59
src/Core/SortDescription.cpp
View File

@ -15,6 +15,11 @@
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
}
void dumpSortDescription(const SortDescription & description, WriteBuffer & out)
{
bool first = true;
@ -209,4 +214,58 @@ JSONBuilder::ItemPtr explainSortDescription(const SortDescription & description)
return json_array;
}
void serializeSortDescription(const SortDescription & sort_description, WriteBuffer & out)
{
writeVarUInt(sort_description.size(), out);
for (const auto & desc : sort_description)
{
writeStringBinary(desc.column_name, out);
UInt8 flags = 0;
if (desc.direction > 0)
flags |= 1;
if (desc.nulls_direction > 0)
flags |= 2;
if (desc.collator)
flags |= 4;
if (desc.with_fill)
flags |= 8;
writeIntBinary(flags, out);
if (desc.collator)
writeStringBinary(desc.collator->getLocale(), out);
if (desc.with_fill)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "WITH FILL is not supported in serialized sort description");
}
}
void deserializeSortDescription(SortDescription & sort_description, ReadBuffer & in)
{
size_t size = 0;
readVarUInt(size, in);
sort_description.resize(size);
for (auto & desc : sort_description)
{
readStringBinary(desc.column_name, in);
UInt8 flags = 0;
readIntBinary(flags, in);
desc.direction = (flags & 1) ? 1 : -1;
desc.nulls_direction = (flags & 2) ? 1 : -1;
if (flags & 4)
{
String collator_locale;
readStringBinary(collator_locale, in);
if (!collator_locale.empty())
desc.collator = std::make_shared<Collator>(collator_locale);
}
if (flags & 8)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "WITH FILL is not supported in deserialized sort description");
}
}
}

7
src/Core/SortDescription.h
View File

@ -140,4 +140,11 @@ void dumpSortDescription(const SortDescription & description, WriteBuffer & out)
std::string dumpSortDescription(const SortDescription & description);
JSONBuilder::ItemPtr explainSortDescription(const SortDescription & description);
class WriteBuffer;
class ReadBuffer;
void serializeSortDescription(const SortDescription & sort_description, WriteBuffer & out);
void deserializeSortDescription(SortDescription & sort_description, ReadBuffer & in);
}