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54 lines
1.3 KiB
SQL
54 lines
1.3 KiB
SQL
DROP TABLE IF EXISTS collapsing_table;
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SET optimize_on_insert = 0;
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CREATE TABLE collapsing_table
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(
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key UInt64,
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value UInt64,
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Sign Int8
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)
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ENGINE = CollapsingMergeTree(Sign)
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ORDER BY key
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SETTINGS
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vertical_merge_algorithm_min_rows_to_activate=0,
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vertical_merge_algorithm_min_columns_to_activate=0,
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min_bytes_for_wide_part = 0;
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INSERT INTO collapsing_table SELECT if(number == 8192, 8191, number), 1, if(number == 8192, +1, -1) FROM numbers(8193);
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SELECT sum(Sign), count() from collapsing_table;
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OPTIMIZE TABLE collapsing_table FINAL;
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SELECT sum(Sign), count() from collapsing_table;
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DROP TABLE IF EXISTS collapsing_table;
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DROP TABLE IF EXISTS collapsing_suspicious_granularity;
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CREATE TABLE collapsing_suspicious_granularity
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(
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key UInt64,
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value UInt64,
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Sign Int8
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)
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ENGINE = CollapsingMergeTree(Sign)
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ORDER BY key
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SETTINGS
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vertical_merge_algorithm_min_rows_to_activate=0,
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vertical_merge_algorithm_min_columns_to_activate=0,
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min_bytes_for_wide_part = 0,
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index_granularity = 1;
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INSERT INTO collapsing_suspicious_granularity VALUES (1, 1, -1) (1, 1, 1);
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SELECT sum(Sign), count() from collapsing_suspicious_granularity;
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OPTIMIZE TABLE collapsing_suspicious_granularity FINAL;
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SELECT sum(Sign), count() from collapsing_suspicious_granularity;
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DROP TABLE IF EXISTS collapsing_suspicious_granularity;
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