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117 lines
3.1 KiB
SQL
117 lines
3.1 KiB
SQL
SELECT 'ReplacingMergeTree';
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DROP TABLE IF EXISTS tp;
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CREATE TABLE tp
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(
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`type` Int32,
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`eventcnt` UInt64,
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PROJECTION p
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(
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SELECT type,sum(eventcnt)
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GROUP BY type
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)
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)
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ENGINE = ReplacingMergeTree
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ORDER BY type
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SETTINGS deduplicate_merge_projection_mode = 'rebuild';
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INSERT INTO tp SELECT number%3, 1 FROM numbers(3);
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INSERT INTO tp SELECT number%3, 2 FROM numbers(3);
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OPTIMIZE TABLE tp FINAL;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 0, force_optimize_projection = 0;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 1, force_optimize_projection = 1;
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SELECT 'CollapsingMergeTree';
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DROP TABLE IF EXISTS tp;
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CREATE TABLE tp
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(
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`type` Int32,
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`eventcnt` UInt64,
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`sign` Int8,
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PROJECTION p
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(
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SELECT type,sum(eventcnt)
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GROUP BY type
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)
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)
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ENGINE = CollapsingMergeTree(sign)
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ORDER BY type
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SETTINGS deduplicate_merge_projection_mode = 'rebuild';
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INSERT INTO tp SELECT number % 3, 1, 1 FROM numbers(3);
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INSERT INTO tp SELECT number % 3, 1, -1 FROM numbers(3);
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INSERT INTO tp SELECT number % 3, 2, 1 FROM numbers(3);
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OPTIMIZE TABLE tp FINAL;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 0, force_optimize_projection = 0;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 1, force_optimize_projection = 1;
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-- Actually we don't need to test all 3 engines Replacing/Collapsing/VersionedCollapsing,
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-- Because they share the same logic of 'reduce number of rows during merges'
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SELECT 'VersionedCollapsingMergeTree';
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DROP TABLE IF EXISTS tp;
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CREATE TABLE tp
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(
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`type` Int32,
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`eventcnt` UInt64,
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`sign` Int8,
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`version` UInt8,
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PROJECTION p
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(
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SELECT type,sum(eventcnt)
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GROUP BY type
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)
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)
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ENGINE = VersionedCollapsingMergeTree(sign,version)
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ORDER BY type
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SETTINGS deduplicate_merge_projection_mode = 'rebuild';
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INSERT INTO tp SELECT number % 3, 1, -1, 0 FROM numbers(3);
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INSERT INTO tp SELECT number % 3, 2, 1, 1 FROM numbers(3);
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INSERT INTO tp SELECT number % 3, 1, 1, 0 FROM numbers(3);
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OPTIMIZE TABLE tp FINAL;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 0, force_optimize_projection = 0;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 1, force_optimize_projection = 1;
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SELECT 'DEDUPLICATE ON MergeTree';
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DROP TABLE IF EXISTS tp;
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CREATE TABLE tp
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(
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`type` Int32,
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`eventcnt` UInt64,
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PROJECTION p
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(
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SELECT type,sum(eventcnt)
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GROUP BY type
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)
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)
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ENGINE = MergeTree
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ORDER BY type
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SETTINGS deduplicate_merge_projection_mode = 'rebuild';
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INSERT INTO tp SELECT number % 3, 1 FROM numbers(3);
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INSERT INTO tp SELECT number % 3, 2 FROM numbers(3);
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OPTIMIZE TABLE tp FINAL DEDUPLICATE BY type;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 0, force_optimize_projection = 0;
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SELECT type,sum(eventcnt) FROM tp GROUP BY type ORDER BY type
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SETTINGS optimize_use_projections = 1, force_optimize_projection = 1;
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