ClickHouse/dbms/src/Storages/MergeTree/ReplicatedMergeTreeLogEntry.cpp
Nikita Vasilev 8d2b32fda8 clear index
2019-05-09 17:25:18 +03:00

226 lines
5.7 KiB
C++

#include <Common/ZooKeeper/Types.h>
#include <Storages/MergeTree/ReplicatedMergeTreeLogEntry.h>
#include <IO/Operators.h>
#include <IO/ReadBufferFromString.h>
#include <IO/WriteBufferFromString.h>
namespace DB
{
void ReplicatedMergeTreeLogEntryData::writeText(WriteBuffer & out) const
{
out << "format version: 4\n"
<< "create_time: " << LocalDateTime(create_time ? create_time : time(nullptr)) << "\n"
<< "source replica: " << source_replica << '\n'
<< "block_id: " << escape << block_id << '\n';
switch (type)
{
case GET_PART:
out << "get\n" << new_part_name;
break;
case MERGE_PARTS:
out << "merge\n";
for (const String & s : source_parts)
out << s << '\n';
out << "into\n" << new_part_name;
out << "\ndeduplicate: " << deduplicate;
break;
case DROP_RANGE:
if (detach)
out << "detach\n";
else
out << "drop\n";
out << new_part_name;
break;
case CLEAR_COLUMN:
out << "clear_column\n"
<< escape << column_name
<< "\nfrom\n"
<< new_part_name;
break;
case CLEAR_INDEX:
out << "clear_index\n"
<< escape << index_name
<< "\nfrom\n"
<< new_part_name;
break;
case REPLACE_RANGE:
out << typeToString(REPLACE_RANGE) << "\n";
replace_range_entry->writeText(out);
break;
case MUTATE_PART:
out << "mutate\n"
<< source_parts.at(0) << "\n"
<< "to\n"
<< new_part_name;
break;
default:
throw Exception("Unknown log entry type: " + DB::toString<int>(type), ErrorCodes::LOGICAL_ERROR);
}
out << '\n';
if (quorum)
out << "quorum: " << quorum << '\n';
}
void ReplicatedMergeTreeLogEntryData::readText(ReadBuffer & in)
{
UInt8 format_version = 0;
String type_str;
in >> "format version: " >> format_version >> "\n";
if (format_version < 1 || format_version > 4)
throw Exception("Unknown ReplicatedMergeTreeLogEntry format version: " + DB::toString(format_version), ErrorCodes::UNKNOWN_FORMAT_VERSION);
if (format_version >= 2)
{
LocalDateTime create_time_dt;
in >> "create_time: " >> create_time_dt >> "\n";
create_time = create_time_dt;
}
in >> "source replica: " >> source_replica >> "\n";
if (format_version >= 3)
{
in >> "block_id: " >> escape >> block_id >> "\n";
}
in >> type_str >> "\n";
if (type_str == "get")
{
type = GET_PART;
in >> new_part_name;
}
else if (type_str == "merge")
{
type = MERGE_PARTS;
while (true)
{
String s;
in >> s >> "\n";
if (s == "into")
break;
source_parts.push_back(s);
}
in >> new_part_name;
if (format_version >= 4)
in >> "\ndeduplicate: " >> deduplicate;
}
else if (type_str == "drop" || type_str == "detach")
{
type = DROP_RANGE;
detach = type_str == "detach";
in >> new_part_name;
}
else if (type_str == "clear_column")
{
type = CLEAR_COLUMN;
in >> escape >> column_name >> "\nfrom\n" >> new_part_name;
}
else if (type_str == "clear_index")
{
type = CLEAR_INDEX;
in >> escape >> index_name >> "\nfrom\n" >> new_part_name;
}
else if (type_str == typeToString(REPLACE_RANGE))
{
type = REPLACE_RANGE;
replace_range_entry = std::make_shared<ReplaceRangeEntry>();
replace_range_entry->readText(in);
}
else if (type_str == "mutate")
{
type = MUTATE_PART;
String source_part;
in >> source_part >> "\n"
>> "to\n"
>> new_part_name;
source_parts.push_back(source_part);
}
in >> "\n";
/// Optional field.
if (!in.eof())
in >> "quorum: " >> quorum >> "\n";
}
void ReplicatedMergeTreeLogEntryData::ReplaceRangeEntry::writeText(WriteBuffer & out) const
{
out << "drop_range_name: " << drop_range_part_name << "\n";
out << "from_database: " << escape << from_database << "\n";
out << "from_table: " << escape << from_table << "\n";
out << "source_parts: ";
writeQuoted(src_part_names, out);
out << "\n";
out << "new_parts: ";
writeQuoted(new_part_names, out);
out << "\n";
out << "part_checksums: ";
writeQuoted(part_names_checksums, out);
out << "\n";
out << "columns_version: " << columns_version;
}
void ReplicatedMergeTreeLogEntryData::ReplaceRangeEntry::readText(ReadBuffer & in)
{
in >> "drop_range_name: " >> drop_range_part_name >> "\n";
in >> "from_database: " >> escape >> from_database >> "\n";
in >> "from_table: " >> escape >> from_table >> "\n";
in >> "source_parts: ";
readQuoted(src_part_names, in);
in >> "\n";
in >> "new_parts: ";
readQuoted(new_part_names, in);
in >> "\n";
in >> "part_checksums: ";
readQuoted(part_names_checksums, in);
in >> "\n";
in >> "columns_version: " >> columns_version;
}
String ReplicatedMergeTreeLogEntryData::toString() const
{
WriteBufferFromOwnString out;
writeText(out);
return out.str();
}
ReplicatedMergeTreeLogEntry::Ptr ReplicatedMergeTreeLogEntry::parse(const String & s, const Coordination::Stat & stat)
{
ReadBufferFromString in(s);
Ptr res = std::make_shared<ReplicatedMergeTreeLogEntry>();
res->readText(in);
assertEOF(in);
if (!res->create_time)
res->create_time = stat.ctime / 1000;
return res;
}
}