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ClickHouse® is a real-time analytics DBMS
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The function is rewritten to avoid allocations on every insert with Field deserialising each array. The key type is now specialized, so it can be accessed directly. The value type is variant type, but only individual values are deserialised (which is cheap, since they're PODs). The function also support summing of multiple columns by the same key. The SummingSortedBlockInputStream uses the function in case of Nested structure with one numeric key and many values to sum. |
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| dbms | ||
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| libs | ||
| utils | ||
| website | ||
| .clang-format | ||
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| .gitattributes | ||
| .gitignore | ||
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| AUTHORS | ||
| CHANGELOG_RU.md | ||
| CHANGELOG.md | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| copy_headers.sh | ||
| docker-compose.yml | ||
| format_sources | ||
| format.sh | ||
| LICENSE | ||
| MacOS.md | ||
| README.md | ||
| release | ||
| release_lib.sh | ||
| release_test | ||
ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.
ClickHouse Community Meetup in Palo Alto on October 25, 2017