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Copy pathTableExpressionModifiers.cpp
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140 lines (113 loc) · 4.18 KB
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#include <Analyzer/TableExpressionModifiers.h>
#include <Common/SipHash.h>
#include <Core/Streaming/CursorTree.h>
#include <Core/Streaming/StreamingVirtualColumns.h>
#include <Storages/StorageInMemoryMetadata.h>
#include <IO/ReadBuffer.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteBuffer.h>
#include <IO/WriteHelpers.h>
#include <IO/Operators.h>
#include <IO/WriteBufferFromString.h>
namespace DB
{
void TableExpressionModifiers::dump(WriteBuffer & buffer) const
{
buffer << "final: " << has_final;
if (sample_size_ratio)
buffer << ", sample_size: " << ASTSampleRatio::toString(*sample_size_ratio);
if (sample_offset_ratio)
buffer << ", sample_offset: " << ASTSampleRatio::toString(*sample_offset_ratio);
if (stream_settings)
buffer << ", stream";
}
void TableExpressionModifiers::updateTreeHash(SipHash & hash_state) const
{
hash_state.update(has_final);
hash_state.update(sample_size_ratio.has_value());
hash_state.update(sample_offset_ratio.has_value());
hash_state.update(stream_settings.has_value());
if (sample_size_ratio.has_value())
{
hash_state.update(sample_size_ratio->numerator);
hash_state.update(sample_size_ratio->denominator);
}
if (sample_offset_ratio.has_value())
{
hash_state.update(sample_offset_ratio->numerator);
hash_state.update(sample_offset_ratio->denominator);
}
if (stream_settings.has_value())
{
hash_state.update(stream_settings->subscribe_for_updates);
hash_state.update(stream_settings->unordered);
if (stream_settings->cursor)
{
for (const auto & entry : cursorTreeToMap(stream_settings->cursor))
{
const auto & tuple = entry.safeGet<Tuple>();
hash_state.update(tuple.at(0).safeGet<String>());
hash_state.update(tuple.at(1).safeGet<Int64>());
}
}
if (stream_settings->watermark)
{
hash_state.update(stream_settings->watermark->column);
hash_state.update(stream_settings->watermark->idle_timeout.count());
stream_settings->watermark->expression->updateTreeHash(hash_state, /*ignore_aliases=*/false);
}
}
}
void serializeRational(TableExpressionModifiers::Rational val, WriteBuffer & out)
{
writeIntBinary(val.numerator, out);
writeIntBinary(val.denominator, out);
}
TableExpressionModifiers::Rational deserializeRational(ReadBuffer & in)
{
TableExpressionModifiers::Rational val;
readIntBinary(val.numerator, in);
readIntBinary(val.denominator, in);
return val;
}
String TableExpressionModifiers::formatForErrorMessage() const
{
WriteBufferFromOwnString buffer;
if (has_final)
buffer << "FINAL";
if (sample_size_ratio)
{
if (has_final)
buffer << ' ';
buffer << "SAMPLE " << ASTSampleRatio::toString(*sample_size_ratio);
}
if (sample_offset_ratio)
{
if (has_final || sample_size_ratio)
buffer << ' ';
buffer << "OFFSET " << ASTSampleRatio::toString(*sample_offset_ratio);
}
if (stream_settings)
{
if (has_final || sample_size_ratio || sample_offset_ratio)
buffer << ' ';
buffer << "STREAM";
}
return buffer.str();
}
StorageMetadataPtr extendMetadataWithModifiers(const StorageMetadataPtr & metadata, const TableExpressionModifiers & modifiers)
{
if (!modifiers.hasStream())
return metadata;
const auto & stream_settings = modifiers.getStreamSettings();
if (!stream_settings->watermark)
return metadata;
auto column = metadata->getColumns().tryGetColumn(GetColumnsOptions::AllPhysical, stream_settings->watermark->column);
if (!column)
return metadata;
auto extended = std::make_shared<StorageInMemoryMetadata>(*metadata);
extended->virtuals.addEphemeral(std::string(TimeAttributeColumn::name), column->type, "Event-time value of the current row.", VirtualsMaterializationPlace::Streaming);
extended->virtuals.addEphemeral(std::string(WatermarkColumn::name), column->type, "Watermark expression value of the current row.", VirtualsMaterializationPlace::Streaming);
return extended;
}
}