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#include "PartitionedSink.h"
#include <Common/ArenaUtils.h>
#include <Functions/FunctionsConversion.h>
#include <Interpreters/Context.h>
#include <Interpreters/ExpressionAnalyzer.h>
#include <Interpreters/TreeRewriter.h>
#include <Interpreters/evaluateConstantExpression.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTInsertQuery.h>
#include <Parsers/ASTLiteral.h>
#include <Processors/ISource.h>
#include <boost/algorithm/string/replace.hpp>
namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_PARSE_TEXT;
}
PartitionedSink::PartitionedSink(
const ASTPtr & partition_by,
ContextPtr context_,
const Block & sample_block_)
: SinkToStorage(sample_block_)
, context(context_)
, sample_block(sample_block_)
{
ASTs arguments(1, partition_by);
ASTPtr partition_by_string = makeASTFunction(FunctionToString::name, std::move(arguments));
auto syntax_result = TreeRewriter(context).analyze(partition_by_string, sample_block.getNamesAndTypesList());
partition_by_expr = ExpressionAnalyzer(partition_by_string, syntax_result, context).getActions(false);
partition_by_column_name = partition_by_string->getColumnName();
}
SinkPtr PartitionedSink::getSinkForPartitionKey(StringRef partition_key)
{
auto it = partition_id_to_sink.find(partition_key);
if (it == partition_id_to_sink.end())
{
auto sink = createSinkForPartition(partition_key.toString());
std::tie(it, std::ignore) = partition_id_to_sink.emplace(partition_key, sink);
}
return it->second;
}
void PartitionedSink::consume(Chunk chunk)
{
const auto & columns = chunk.getColumns();
Block block_with_partition_by_expr = sample_block.cloneWithoutColumns();
block_with_partition_by_expr.setColumns(columns);
partition_by_expr->execute(block_with_partition_by_expr);
const auto * partition_by_result_column = block_with_partition_by_expr.getByName(partition_by_column_name).column.get();
size_t chunk_rows = chunk.getNumRows();
chunk_row_index_to_partition_index.resize(chunk_rows);
partition_id_to_chunk_index.clear();
for (size_t row = 0; row < chunk_rows; ++row)
{
auto partition_key = partition_by_result_column->getDataAt(row);
auto [it, inserted] = partition_id_to_chunk_index.insert(makePairNoInit(partition_key, partition_id_to_chunk_index.size()));
if (inserted)
it->value.first = copyStringInArena(partition_keys_arena, partition_key);
chunk_row_index_to_partition_index[row] = it->getMapped();
}
size_t columns_size = columns.size();
size_t partitions_size = partition_id_to_chunk_index.size();
Chunks partition_index_to_chunk;
partition_index_to_chunk.reserve(partitions_size);
for (size_t column_index = 0; column_index < columns_size; ++column_index)
{
MutableColumns partition_index_to_column_split = columns[column_index]->scatter(partitions_size, chunk_row_index_to_partition_index);
/// Add chunks into partition_index_to_chunk with sizes of result columns
if (column_index == 0)
{
for (const auto & partition_column : partition_index_to_column_split)
{
partition_index_to_chunk.emplace_back(Columns(), partition_column->size());
}
}
for (size_t partition_index = 0; partition_index < partitions_size; ++partition_index)
{
partition_index_to_chunk[partition_index].addColumn(std::move(partition_index_to_column_split[partition_index]));
}
}
for (const auto & [partition_key, partition_index] : partition_id_to_chunk_index)
{
auto sink = getSinkForPartitionKey(partition_key);
sink->consume(std::move(partition_index_to_chunk[partition_index]));
}
}
void PartitionedSink::onException(std::exception_ptr exception)
{
for (auto & [_, sink] : partition_id_to_sink)
{
sink->onException(exception);
}
}
void PartitionedSink::onFinish()
{
for (auto & [_, sink] : partition_id_to_sink)
{
sink->onFinish();
}
}
void PartitionedSink::validatePartitionKey(const String & str, bool allow_slash)
{
for (const char * i = str.data(); i != str.data() + str.size(); ++i)
{
if (static_cast<UInt8>(*i) < 0x20 || *i == '{' || *i == '}' || *i == '*' || *i == '?' || (!allow_slash && *i == '/'))
{
/// Need to convert to UInt32 because UInt8 can't be passed to format due to "mixing character types is disallowed".
UInt32 invalid_char_byte = static_cast<UInt32>(static_cast<UInt8>(*i));
throw DB::Exception(
ErrorCodes::CANNOT_PARSE_TEXT, "Illegal character '\\x{:02x}' in partition id starting with '{}'",
invalid_char_byte, std::string(str.data(), i - str.data()));
}
}
}
String PartitionedSink::replaceWildcards(const String & haystack, const String & partition_id)
{
return boost::replace_all_copy(haystack, PartitionedSink::PARTITION_ID_WILDCARD, partition_id);
}
}
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