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88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
#include <DataTypes/DataTypeDate.h>
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#include <DataTypes/DataTypeDateTime.h>
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#include <DataTypes/DataTypeDateTime64.h>
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#include <DataTypes/DataTypeLowCardinality.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Interpreters/AsynchronousMetricLog.h>
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#include <Parsers/ExpressionElementParsers.h>
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#include <Parsers/parseQuery.h>
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#include <base/getFQDNOrHostName.h>
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#include <Common/DateLUTImpl.h>
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namespace DB
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{
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ColumnsDescription AsynchronousMetricLogElement::getColumnsDescription()
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{
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ParserCodec codec_parser;
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return ColumnsDescription
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{
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{
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"hostname",
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std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>()),
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parseQuery(codec_parser, "(ZSTD(1))", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH, DBMS_DEFAULT_MAX_PARSER_BACKTRACKS),
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"Hostname of the server executing the query."
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},
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{
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"event_date",
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std::make_shared<DataTypeDate>(),
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parseQuery(codec_parser, "(Delta(2), ZSTD(1))", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH, DBMS_DEFAULT_MAX_PARSER_BACKTRACKS),
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"Event date."
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},
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{
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"event_time",
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std::make_shared<DataTypeDateTime>(),
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parseQuery(codec_parser, "(Delta(4), ZSTD(1))", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH, DBMS_DEFAULT_MAX_PARSER_BACKTRACKS),
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"Event time."
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},
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{
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"metric",
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std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>()),
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parseQuery(codec_parser, "(ZSTD(1))", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH, DBMS_DEFAULT_MAX_PARSER_BACKTRACKS),
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"Metric name."
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},
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{
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"value",
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std::make_shared<DataTypeFloat64>(),
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parseQuery(codec_parser, "(ZSTD(3))", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH, DBMS_DEFAULT_MAX_PARSER_BACKTRACKS),
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"Metric value."
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}
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};
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}
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void AsynchronousMetricLogElement::appendToBlock(MutableColumns & columns) const
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{
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size_t column_idx = 0;
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columns[column_idx++]->insert(getFQDNOrHostName());
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columns[column_idx++]->insert(event_date);
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columns[column_idx++]->insert(event_time);
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columns[column_idx++]->insert(metric_name);
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columns[column_idx++]->insert(value);
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}
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void AsynchronousMetricLog::addValues(const AsynchronousMetricValues & values)
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{
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AsynchronousMetricLogElement element;
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element.event_time = time(nullptr);
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element.event_date = DateLUT::instance().toDayNum(element.event_time);
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/// We will round the values to make them compress better in the table.
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/// Note: as an alternative we can also use fixed point Decimal data type,
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/// but we need to store up to UINT64_MAX sometimes.
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static constexpr double precision = 1000.0;
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for (const auto & [key, value] : values)
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{
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element.metric_name = key;
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element.value = round(value.value * precision) / precision;
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add(element);
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}
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}
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}
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