----- Group of very similar simple tests ------ DROP TABLE IF EXISTS zero_rows_per_granule; CREATE TABLE zero_rows_per_granule ( p Date, k UInt64, v1 UInt64, v2 Int64, Sign Int8, Version UInt8 ) ENGINE VersionedCollapsingMergeTree(Sign, Version) PARTITION BY toYYYYMM(p) ORDER BY k SETTINGS index_granularity_bytes=20, write_final_mark = 0, enable_vertical_merge_algorithm=1, vertical_merge_algorithm_min_rows_to_activate=0, vertical_merge_algorithm_min_columns_to_activate=0; INSERT INTO zero_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 1, 1000, 2000, 1, 1), ('2018-05-16', 2, 3000, 4000, 1, 1), ('2018-05-17', 3, 5000, 6000, 1, 1), ('2018-05-18', 4, 7000, 8000, 1, 1); SELECT COUNT(*) FROM zero_rows_per_granule; SELECT distinct(marks) from system.parts WHERE table = 'zero_rows_per_granule' and database=currentDatabase() and active=1; INSERT INTO zero_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 5, 1000, 2000, 1, 1), ('2018-05-16', 6, 3000, 4000, 1, 1), ('2018-05-17', 7, 5000, 6000, 1, 1), ('2018-05-19', 8, 7000, 8000, 1, 1); OPTIMIZE TABLE zero_rows_per_granule FINAL; SELECT COUNT(*) FROM zero_rows_per_granule FINAL; SELECT sum(marks) from system.parts WHERE table = 'zero_rows_per_granule' and database=currentDatabase() and active=1; DROP TABLE IF EXISTS zero_rows_per_granule; SELECT '-----'; DROP TABLE IF EXISTS four_rows_per_granule; CREATE TABLE four_rows_per_granule ( p Date, k UInt64, v1 UInt64, v2 Int64, Sign Int8, Version UInt8 ) ENGINE VersionedCollapsingMergeTree(Sign, Version) PARTITION BY toYYYYMM(p) ORDER BY k SETTINGS index_granularity_bytes=120, write_final_mark = 0, enable_vertical_merge_algorithm=1, vertical_merge_algorithm_min_rows_to_activate=0, vertical_merge_algorithm_min_columns_to_activate=0; INSERT INTO four_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 1, 1000, 2000, 1, 1), ('2018-05-16', 2, 3000, 4000, 1, 1), ('2018-05-17', 3, 5000, 6000, 1, 1), ('2018-05-18', 4, 7000, 8000, 1, 1); SELECT COUNT(*) FROM four_rows_per_granule; SELECT distinct(marks) from system.parts WHERE table = 'four_rows_per_granule' and database=currentDatabase() and active=1; INSERT INTO four_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 1, 1000, 2000, -1, 1), ('2018-05-16', 2, 3000, 4000, -1, 1), ('2018-05-17', 3, 5000, 6000, -1, 1), ('2018-05-18', 4, 7000, 8000, -1, 1); OPTIMIZE TABLE four_rows_per_granule FINAL; SELECT COUNT(*) FROM four_rows_per_granule; SELECT distinct(marks) from system.parts WHERE table = 'four_rows_per_granule' and database=currentDatabase() and active=1; INSERT INTO four_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 1, 1000, 2000, 1, 1), ('2018-05-16', 2, 3000, 4000, 1, 1), ('2018-05-17', 3, 5000, 6000, 1, 1), ('2018-05-18', 4, 7000, 8000, 1, 1); INSERT INTO four_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 5, 1000, 2000, 1, 1), ('2018-05-16', 6, 3000, 4000, 1, 1), ('2018-05-17', 7, 5000, 6000, 1, 1), ('2018-05-18', 8, 7000, 8000, 1, 1); INSERT INTO four_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 5, 1000, 2000, -1, 1), ('2018-05-17', 7, 5000, 6000, -1, 1); OPTIMIZE TABLE four_rows_per_granule FINAL; SELECT COUNT(*) FROM four_rows_per_granule; SELECT distinct(marks) from system.parts WHERE table = 'four_rows_per_granule' and database=currentDatabase() and active=1; DROP TABLE IF EXISTS four_rows_per_granule; SELECT '-----'; DROP TABLE IF EXISTS six_rows_per_granule; CREATE TABLE six_rows_per_granule ( p Date, k UInt64, v1 UInt64, v2 Int64, Sign Int8, Version UInt8 ) ENGINE VersionedCollapsingMergeTree(Sign, Version) PARTITION BY toYYYYMM(p) ORDER BY k SETTINGS index_granularity_bytes=170, write_final_mark = 0, enable_vertical_merge_algorithm=1, vertical_merge_algorithm_min_rows_to_activate=0, vertical_merge_algorithm_min_columns_to_activate=0; INSERT INTO six_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 1, 1000, 2000, 1, 1), ('2018-05-16', 1, 1000, 2000, -1, 2); INSERT INTO six_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 2, 1000, 2000, 1, 1), ('2018-05-16', 2, 1000, 2000, -1, 2); INSERT INTO six_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 3, 1000, 2000, 1, 1), ('2018-05-16', 3, 1000, 2000, -1, 2); OPTIMIZE TABLE six_rows_per_granule FINAL; SELECT COUNT(*) FROM six_rows_per_granule; SELECT distinct(marks) from system.parts WHERE table = 'six_rows_per_granule' and database=currentDatabase() and active=1; INSERT INTO six_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 1, 1000, 2000, -1, 1), ('2018-05-16', 1, 1000, 2000, 1, 2); INSERT INTO six_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 2, 1000, 2000, -1, 1), ('2018-05-16', 2, 1000, 2000, 1, 2); INSERT INTO six_rows_per_granule (p, k, v1, v2, Sign, Version) VALUES ('2018-05-15', 3, 1000, 2000, -1, 1), ('2018-05-16', 3, 1000, 2000, 1, 2); OPTIMIZE TABLE six_rows_per_granule FINAL; SELECT COUNT(*) FROM six_rows_per_granule; SELECT distinct(marks) from system.parts WHERE table = 'six_rows_per_granule' and database=currentDatabase() and active=1; DROP TABLE IF EXISTS six_rows_per_granule;