175 lines
8.4 KiB
Plaintext
175 lines
8.4 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, '$.city'))) STORED,
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KEY (city)
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);
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EXPLAIN SELECT name, id FROM person WHERE city = 'Beijing';
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id count task operator info
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Projection_4 10.00 root test.person.name, test.person.id
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└─IndexLookUp_10 10.00 root
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├─IndexScan_8 10.00 cop[tikv] table:person, index:city, range:["Beijing","Beijing"], keep order:false, stats:pseudo
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└─TableScan_9 10.00 cop[tikv] table:person, keep order:false, stats:pseudo
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DROP TABLE IF EXISTS `sgc`;
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CREATE TABLE `sgc` (
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`j1` JSON DEFAULT NULL,
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`j2` JSON DEFAULT NULL,
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`a` int(11) GENERATED ALWAYS AS (JSON_EXTRACT(`j1`, "$.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[tikv] 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[tikv] 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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IndexReader_13 3323.33 root index:Selection_12
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└─Selection_12 3323.33 cop[tikv] lt(test.sgc.b, 3)
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└─IndexScan_11 10000.00 cop[tikv] table:sgc, index:a, b, range:[NULL,+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[tikv] lt(test.sgc.b, 3)
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└─IndexScan_9 3323.33 cop[tikv] 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_26 5.00 root inner join, inner:IndexLookUp_25, outer key:test.sgc2.a, inner key:test.sgc1.a
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├─IndexLookUp_25 5.00 root
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│ ├─Selection_24 5.00 cop[tikv] not(isnull(test.sgc1.a))
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│ │ └─IndexScan_22 5.00 cop[tikv] table:sgc1, index:a, range: decided by [eq(test.sgc1.a, test.sgc2.a)], keep order:false
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│ └─TableScan_23 5.00 cop[tikv] table:sgc1, keep order:false
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└─TableReader_38 1.00 root data:Selection_37
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└─Selection_37 1.00 cop[tikv] not(isnull(test.sgc2.a))
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└─TableScan_36 1.00 cop[tikv] 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_24 5.00 root inner join, inner:TableReader_43, equal:[eq(test.sgc2.a, test.sgc1.a)]
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├─TableReader_43 1.00 root data:Selection_42
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│ └─Selection_42 1.00 cop[tikv] not(isnull(test.sgc2.a))
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│ └─TableScan_41 1.00 cop[tikv] table:sgc2, range:[-inf,+inf], keep order:false
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└─TableReader_52 5.00 root data:Selection_51
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└─Selection_51 5.00 cop[tikv] not(isnull(test.sgc1.a))
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└─TableScan_50 5.00 cop[tikv] 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[tikv] le(test.sgc3.a, 1)
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│ └─TableScan_9 10000.00 cop[tikv] 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[tikv] le(test.sgc3.a, 1)
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└─TableScan_12 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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│ └─TableScan_14 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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│ └─TableScan_17 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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│ └─TableScan_20 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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│ └─TableScan_23 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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│ └─TableScan_26 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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│ └─TableScan_29 10000.00 cop[tikv] 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[tikv] lt(test.sgc3.a, 7)
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└─TableScan_32 10000.00 cop[tikv] table:sgc3, partition:max, range:[-inf,+inf], keep order:false, stats:pseudo
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1(a INT, b INT AS (a+1) VIRTUAL, c INT AS (b+1) VIRTUAL, d INT AS (c+1) VIRTUAL, KEY(b), INDEX IDX(c, d));
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INSERT INTO t1 (a) VALUES (0);
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EXPLAIN SELECT b FROM t1 WHERE b=1;
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id count task operator info
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IndexReader_6 10.00 root index:IndexScan_5
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└─IndexScan_5 10.00 cop[tikv] table:t1, index:b, range:[1,1], keep order:false, stats:pseudo
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EXPLAIN SELECT b, c, d FROM t1 WHERE b=1;
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id count task operator info
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Projection_4 10.00 root test.t1.b, test.t1.c, test.t1.d
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└─IndexLookUp_10 10.00 root
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├─IndexScan_8 10.00 cop[tikv] table:t1, index:b, range:[1,1], keep order:false, stats:pseudo
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└─TableScan_9 10.00 cop[tikv] table:t1, keep order:false, stats:pseudo
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EXPLAIN SELECT * FROM t1 WHERE b=1;
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id count task operator info
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IndexLookUp_10 10.00 root
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├─IndexScan_8 10.00 cop[tikv] table:t1, index:b, range:[1,1], keep order:false, stats:pseudo
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└─TableScan_9 10.00 cop[tikv] table:t1, keep order:false, stats:pseudo
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EXPLAIN SELECT c FROM t1 WHERE c=2 AND d=3;
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id count task operator info
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Projection_4 0.10 root test.t1.c
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└─IndexReader_6 0.10 root index:IndexScan_5
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└─IndexScan_5 0.10 cop[tikv] table:t1, index:c, d, range:[2 3,2 3], keep order:false, stats:pseudo
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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_no INT AS (JSON_EXTRACT(address_info, '$.city_no')) VIRTUAL,
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KEY(city_no));
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INSERT INTO person (name, address_info) VALUES ("John", CAST('{"city_no": 1}' AS JSON));
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EXPLAIN SELECT name FROM person where city_no=1;
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id count task operator info
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Projection_4 10.00 root test.person.name
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└─IndexLookUp_10 10.00 root
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├─IndexScan_8 10.00 cop[tikv] table:person, index:city_no, range:[1,1], keep order:false, stats:pseudo
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└─TableScan_9 10.00 cop[tikv] table:person, keep order:false, stats:pseudo
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