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https://github.com/GreptimeTeam/greptimedb.git
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dennis zhuang
def0c2ec5c
* fix: only push down aggregates grouped by the partition columns themselves Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: keep grouping sets on the frontend for partitioned tables Signed-off-by: Dennis Zhuang <killme2008@gmail.com> --------- Signed-off-by: Dennis Zhuang <killme2008@gmail.com>
65 lines
2.0 KiB
SQL
65 lines
2.0 KiB
SQL
create table t (
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ts timestamp time index,
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val double,
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host string,
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idc string,
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primary key (host, idc),
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)
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partition on columns (host) (
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host < '1024',
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host >= '1024'
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);
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-- SQLNESS REPLACE (metrics.*) REDACTED
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-- SQLNESS REPLACE (RoundRobinBatch.*) REDACTED
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-- SQLNESS REPLACE (Hash.*) REDACTED
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-- SQLNESS REPLACE (-+) -
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-- SQLNESS REPLACE (\s\s+) _
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-- SQLNESS REPLACE (peers.*) REDACTED
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-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
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-- might write to different partitions
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-- SQLNESS REPLACE "partition_count":\{(.*?)\} "partition_count":REDACTED
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explain analyze
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select sum(val) from t group by host;
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-- SQLNESS REPLACE (metrics.*) REDACTED
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-- SQLNESS REPLACE (RoundRobinBatch.*) REDACTED
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-- SQLNESS REPLACE (-+) -
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-- SQLNESS REPLACE (\s\s+) _
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-- SQLNESS REPLACE (peers.*) REDACTED
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-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
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-- might write to different partitions
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-- SQLNESS REPLACE "partition_count":\{(.*?)\} "partition_count":REDACTED
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explain analyze
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select sum(val) from t;
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-- SQLNESS REPLACE (metrics.*) REDACTED
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-- SQLNESS REPLACE (RoundRobinBatch.*) REDACTED
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-- SQLNESS REPLACE (Hash.*) REDACTED
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-- SQLNESS REPLACE (-+) -
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-- SQLNESS REPLACE (\s\s+) _
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-- SQLNESS REPLACE (peers.*) REDACTED
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-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
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-- might write to different partitions
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-- SQLNESS REPLACE "partition_count":\{(.*?)\} "partition_count":REDACTED
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explain analyze
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select sum(val) from t group by idc;
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insert into t values
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(1000, 1, '1000-x', 'a'),
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(1000, 2, '1000-y', 'a'),
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(1000, 3, '2000-x', 'a'),
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(1000, 4, '2000-y', 'a');
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-- group keys derived from the partition column span regions
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select substr(host, 6, 1) as g, count(*), sum(val) from t group by g order by g;
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-- grouping sets are computed on the frontend, only the PostgreSQL dialect parses them
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-- SQLNESS PROTOCOL POSTGRES
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select host, idc, sum(val) from t group by grouping sets ((host, idc), (host)) order by host, idc;
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-- SQLNESS PROTOCOL POSTGRES
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select host, sum(val) from t group by rollup(host) order by host;
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drop table t;
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