mirror of
https://github.com/ClickHouse/ClickHouse.git
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183 lines
3.9 KiB
Plaintext
183 lines
3.9 KiB
Plaintext
-- { echo }
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DROP TABLE IF EXISTS t_sparse;
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DROP TABLE IF EXISTS t_sparse_1;
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CREATE TABLE t_sparse (id UInt64, u UInt64, s String, arr1 Array(String), arr2 Array(UInt64))
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ENGINE = MergeTree ORDER BY tuple()
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SETTINGS ratio_of_defaults_for_sparse_serialization = 0.1;
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INSERT INTO t_sparse SELECT
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number,
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if (number % 10 = 0, number, 0),
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if (number % 5 = 0, toString(number), ''),
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if (number % 7 = 0, arrayMap(x -> toString(x), range(number % 10)), []),
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if (number % 12 = 0, range(number % 10), [])
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FROM numbers (200);
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SELECT column, serialization_kind FROM system.parts_columns
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WHERE table = 't_sparse' AND database = currentDatabase()
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ORDER BY column;
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arr1 Default
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arr2 Default
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id Default
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s Sparse
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u Sparse
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SELECT * FROM t_sparse WHERE u != 0 ORDER BY id;
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10 10 10 [] []
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20 20 20 [] []
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30 30 30 [] []
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40 40 40 [] []
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50 50 50 [] []
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60 60 60 [] []
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70 70 70 [] []
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80 80 80 [] []
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90 90 90 [] []
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100 100 100 [] []
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110 110 110 [] []
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120 120 120 [] []
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130 130 130 [] []
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140 140 140 [] []
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150 150 150 [] []
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160 160 160 [] []
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170 170 170 [] []
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180 180 180 [] []
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190 190 190 [] []
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SELECT * FROM t_sparse WHERE s != '' ORDER BY id;
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0 0 0 [] []
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5 0 5 [] []
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10 10 10 [] []
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15 0 15 [] []
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20 20 20 [] []
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25 0 25 [] []
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30 30 30 [] []
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35 0 35 ['0','1','2','3','4'] []
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40 40 40 [] []
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45 0 45 [] []
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50 50 50 [] []
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55 0 55 [] []
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60 60 60 [] []
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65 0 65 [] []
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70 70 70 [] []
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75 0 75 [] []
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80 80 80 [] []
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85 0 85 [] []
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90 90 90 [] []
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95 0 95 [] []
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100 100 100 [] []
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105 0 105 ['0','1','2','3','4'] []
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110 110 110 [] []
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115 0 115 [] []
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120 120 120 [] []
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125 0 125 [] []
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130 130 130 [] []
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135 0 135 [] []
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140 140 140 [] []
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145 0 145 [] []
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150 150 150 [] []
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155 0 155 [] []
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160 160 160 [] []
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165 0 165 [] []
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170 170 170 [] []
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175 0 175 ['0','1','2','3','4'] []
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180 180 180 [] []
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185 0 185 [] []
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190 190 190 [] []
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195 0 195 [] []
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SELECT * FROM t_sparse WHERE arr1 != [] ORDER BY id;
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7 0 ['0','1','2','3','4','5','6'] []
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14 0 ['0','1','2','3'] []
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21 0 ['0'] []
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28 0 ['0','1','2','3','4','5','6','7'] []
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35 0 35 ['0','1','2','3','4'] []
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42 0 ['0','1'] []
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49 0 ['0','1','2','3','4','5','6','7','8'] []
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56 0 ['0','1','2','3','4','5'] []
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63 0 ['0','1','2'] []
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77 0 ['0','1','2','3','4','5','6'] []
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84 0 ['0','1','2','3'] [0,1,2,3]
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91 0 ['0'] []
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98 0 ['0','1','2','3','4','5','6','7'] []
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105 0 105 ['0','1','2','3','4'] []
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112 0 ['0','1'] []
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119 0 ['0','1','2','3','4','5','6','7','8'] []
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126 0 ['0','1','2','3','4','5'] []
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133 0 ['0','1','2'] []
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147 0 ['0','1','2','3','4','5','6'] []
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154 0 ['0','1','2','3'] []
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161 0 ['0'] []
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168 0 ['0','1','2','3','4','5','6','7'] [0,1,2,3,4,5,6,7]
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175 0 175 ['0','1','2','3','4'] []
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182 0 ['0','1'] []
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189 0 ['0','1','2','3','4','5','6','7','8'] []
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196 0 ['0','1','2','3','4','5'] []
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SELECT * FROM t_sparse WHERE arr2 != [] ORDER BY id;
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12 0 [] [0,1]
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24 0 [] [0,1,2,3]
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36 0 [] [0,1,2,3,4,5]
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48 0 [] [0,1,2,3,4,5,6,7]
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72 0 [] [0,1]
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84 0 ['0','1','2','3'] [0,1,2,3]
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96 0 [] [0,1,2,3,4,5]
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108 0 [] [0,1,2,3,4,5,6,7]
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132 0 [] [0,1]
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144 0 [] [0,1,2,3]
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156 0 [] [0,1,2,3,4,5]
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168 0 ['0','1','2','3','4','5','6','7'] [0,1,2,3,4,5,6,7]
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192 0 [] [0,1]
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SELECT sum(u) FROM t_sparse;
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1900
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SELECT id % 7, sum(u) FROM t_sparse GROUP BY id % 7 ORDER BY id % 7;
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0 210
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1 360
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2 300
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3 240
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4 190
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5 330
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6 270
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SELECT arrayFilter(x -> x % 2 = 1, arr2) FROM t_sparse WHERE arr2 != [] LIMIT 5;
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[1]
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[1,3]
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[1,3,5]
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[1,3,5,7]
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[1]
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CREATE TABLE t_sparse_1 (id UInt64, v Int64)
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ENGINE = MergeTree ORDER BY tuple()
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SETTINGS ratio_of_defaults_for_sparse_serialization = 0;
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INSERT INTO t_sparse_1 VALUES (1, 6), (2, 1), (3, 0), (4, -1), (5, 0), (6, 0), (7, -2), (8, 0), (9, 0), (10, 4), (11, 0);
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SELECT * FROM t_sparse_1 ORDER BY v, id;
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7 -2
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4 -1
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3 0
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5 0
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6 0
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8 0
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9 0
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11 0
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2 1
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10 4
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1 6
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SELECT * FROM t_sparse_1 ORDER BY v DESC, id;
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1 6
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10 4
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2 1
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3 0
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5 0
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6 0
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8 0
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9 0
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11 0
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4 -1
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7 -2
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SELECT * FROM t_sparse_1 ORDER BY v, id LIMIT 5;
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7 -2
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4 -1
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3 0
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5 0
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6 0
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SELECT * FROM t_sparse_1 ORDER BY v DESC, id LIMIT 5;
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1 6
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10 4
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2 1
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3 0
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5 0
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DROP TABLE t_sparse;
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DROP TABLE t_sparse_1;
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