138 lines
6.3 KiB
Plaintext
138 lines
6.3 KiB
Plaintext
DROP TABLE IF EXISTS person;
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CREATE TABLE person (
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id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
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name VARCHAR(255) NOT NULL,
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address_info JSON,
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city VARCHAR(64) AS (JSON_UNQUOTE(JSON_EXTRACT(address_info, '$.city'))) STORED,
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KEY (city)
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);
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EXPLAIN SELECT name, id FROM person WHERE city = 'Beijing';
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id count task operator info
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Projection_4 10.00 root test.person.name, test.person.id
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└─IndexLookUp_10 10.00 root
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├─IndexScan_8 10.00 cop table:person, index:city, range:["Beijing","Beijing"], keep order:false, stats:pseudo
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└─TableScan_9 10.00 cop table:person, keep order:false, stats:pseudo
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DROP TABLE IF EXISTS `sgc`;
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CREATE TABLE `sgc` (
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`j1` JSON DEFAULT NULL,
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`j2` JSON DEFAULT NULL,
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`a` int(11) GENERATED ALWAYS AS (JSON_EXTRACT(`j1`, "$.a")) STORED,
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`b` int(2) GENERATED ALWAYS AS (JSON_CONTAINS(j2, '1')) STORED,
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KEY `idx_a` (`a`),
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KEY `idx_b` (`b`),
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KEY `idx_a_b` (`a`,`b`)
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);
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EXPLAIN SELECT a FROM sgc where a < 3;
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id count task operator info
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IndexReader_6 3323.33 root index:IndexScan_5
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└─IndexScan_5 3323.33 cop table:sgc, index:a, range:[-inf,3), keep order:false, stats:pseudo
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EXPLAIN SELECT a, b FROM sgc where a < 3;
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id count task operator info
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IndexReader_6 3323.33 root index:IndexScan_5
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└─IndexScan_5 3323.33 cop table:sgc, index:a, b, range:[-inf,3), keep order:false, stats:pseudo
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EXPLAIN SELECT a, b from sgc where b < 3;
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id count task operator info
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TableReader_7 3323.33 root data:Selection_6
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└─Selection_6 3323.33 cop lt(test.sgc.b, 3)
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└─TableScan_5 10000.00 cop table:sgc, range:[-inf,+inf], keep order:false, stats:pseudo
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EXPLAIN SELECT a, b from sgc where a < 3 and b < 3;
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id count task operator info
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IndexReader_11 1104.45 root index:Selection_10
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└─Selection_10 1104.45 cop lt(test.sgc.b, 3)
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└─IndexScan_9 3323.33 cop table:sgc, index:a, b, range:[-inf,3), keep order:false, stats:pseudo
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DROP TABLE IF EXISTS sgc1,
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sgc2;
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CREATE TABLE `sgc1` (
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`j1` JSON,
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`j2` JSON,
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`a` INT AS (JSON_EXTRACT(j1, "$.a")) STORED,
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`b` VARCHAR(20) AS (JSON_KEYS(j2)) STORED,
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KEY `idx_a` (`a`),
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KEY `idx_b` (`b`),
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KEY `idx_a_b` (`a`, `b`)
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);
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CREATE TABLE `sgc2` (
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`j1` JSON,
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`j2` JSON,
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`a` INT AS (JSON_EXTRACT(j1, "$.a")) STORED,
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`b` VARCHAR(20) AS (JSON_KEYS(j2)) STORED,
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KEY `idx_a` (`a`),
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KEY `idx_b` (`b`),
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KEY `idx_a_b` (`a`, `b`)
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);
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INSERT INTO sgc1(j1, j2)
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VALUES ('{"a": 1}', '{"1": "1"}'),
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('{"a": 1}', '{"1": "1"}'),
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('{"a": 1}', '{"1": "1"}'),
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('{"a": 1}', '{"1": "1"}'),
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('{"a": 1}', '{"1": "1"}');
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INSERT INTO sgc2(j1, j2)
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VALUES ('{"a": 1}', '{"1": "1"}');
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ANALYZE TABLE sgc1, sgc2;
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EXPLAIN SELECT /*+ TIDB_INLJ(sgc1, sgc2) */ * from sgc1 join sgc2 on sgc1.a=sgc2.a;
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id count task operator info
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IndexJoin_17 5.00 root inner join, inner:IndexLookUp_16, outer key:test.sgc2.a, inner key:test.sgc1.a
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├─IndexLookUp_16 5.00 root
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│ ├─Selection_15 5.00 cop not(isnull(test.sgc1.a))
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│ │ └─IndexScan_13 5.00 cop table:sgc1, index:a, range: decided by [eq(test.sgc1.a, test.sgc2.a)], keep order:false
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│ └─TableScan_14 5.00 cop table:sgc1, keep order:false
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└─TableReader_20 1.00 root data:Selection_19
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└─Selection_19 1.00 cop not(isnull(test.sgc2.a))
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└─TableScan_18 1.00 cop table:sgc2, range:[-inf,+inf], keep order:false
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EXPLAIN SELECT * from sgc1 join sgc2 on sgc1.a=sgc2.a;
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id count task operator info
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Projection_6 5.00 root test.sgc1.j1, test.sgc1.j2, test.sgc1.a, test.sgc1.b, test.sgc2.j1, test.sgc2.j2, test.sgc2.a, test.sgc2.b
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└─HashRightJoin_20 5.00 root inner join, inner:TableReader_39, equal:[eq(test.sgc2.a, test.sgc1.a)]
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├─TableReader_39 1.00 root data:Selection_38
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│ └─Selection_38 1.00 cop not(isnull(test.sgc2.a))
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│ └─TableScan_37 1.00 cop table:sgc2, range:[-inf,+inf], keep order:false
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└─TableReader_48 5.00 root data:Selection_47
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└─Selection_47 5.00 cop not(isnull(test.sgc1.a))
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└─TableScan_46 5.00 cop table:sgc1, range:[-inf,+inf], keep order:false
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DROP TABLE IF EXISTS sgc3;
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CREATE TABLE sgc3 (
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j JSON,
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a INT AS (JSON_EXTRACT(j, "$.a")) STORED
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)
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PARTITION BY RANGE (a) (
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PARTITION p0 VALUES LESS THAN (1),
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PARTITION p1 VALUES LESS THAN (2),
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PARTITION p2 VALUES LESS THAN (3),
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PARTITION p3 VALUES LESS THAN (4),
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PARTITION p4 VALUES LESS THAN (5),
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PARTITION p5 VALUES LESS THAN (6),
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PARTITION max VALUES LESS THAN MAXVALUE);
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EXPLAIN SELECT * FROM sgc3 WHERE a <= 1;
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id count task operator info
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Union_8 6646.67 root
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├─TableReader_11 3323.33 root data:Selection_10
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│ └─Selection_10 3323.33 cop le(test.sgc3.a, 1)
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│ └─TableScan_9 10000.00 cop table:sgc3, partition:p0, range:[-inf,+inf], keep order:false, stats:pseudo
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└─TableReader_14 3323.33 root data:Selection_13
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└─Selection_13 3323.33 cop le(test.sgc3.a, 1)
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└─TableScan_12 10000.00 cop table:sgc3, partition:p1, range:[-inf,+inf], keep order:false, stats:pseudo
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EXPLAIN SELECT * FROM sgc3 WHERE a < 7;
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id count task operator info
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Union_13 23263.33 root
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├─TableReader_16 3323.33 root data:Selection_15
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│ └─Selection_15 3323.33 cop lt(test.sgc3.a, 7)
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│ └─TableScan_14 10000.00 cop table:sgc3, partition:p0, range:[-inf,+inf], keep order:false, stats:pseudo
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├─TableReader_19 3323.33 root data:Selection_18
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│ └─Selection_18 3323.33 cop lt(test.sgc3.a, 7)
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│ └─TableScan_17 10000.00 cop table:sgc3, partition:p1, range:[-inf,+inf], keep order:false, stats:pseudo
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├─TableReader_22 3323.33 root data:Selection_21
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│ └─Selection_21 3323.33 cop lt(test.sgc3.a, 7)
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│ └─TableScan_20 10000.00 cop table:sgc3, partition:p2, range:[-inf,+inf], keep order:false, stats:pseudo
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├─TableReader_25 3323.33 root data:Selection_24
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│ └─Selection_24 3323.33 cop lt(test.sgc3.a, 7)
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│ └─TableScan_23 10000.00 cop table:sgc3, partition:p3, range:[-inf,+inf], keep order:false, stats:pseudo
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├─TableReader_28 3323.33 root data:Selection_27
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│ └─Selection_27 3323.33 cop lt(test.sgc3.a, 7)
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│ └─TableScan_26 10000.00 cop table:sgc3, partition:p4, range:[-inf,+inf], keep order:false, stats:pseudo
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├─TableReader_31 3323.33 root data:Selection_30
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│ └─Selection_30 3323.33 cop lt(test.sgc3.a, 7)
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│ └─TableScan_29 10000.00 cop table:sgc3, partition:p5, range:[-inf,+inf], keep order:false, stats:pseudo
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└─TableReader_34 3323.33 root data:Selection_33
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└─Selection_33 3323.33 cop lt(test.sgc3.a, 7)
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└─TableScan_32 10000.00 cop table:sgc3, partition:max, range:[-inf,+inf], keep order:false, stats:pseudo
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