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DROP TABLE IF EXISTS t1;
FLUSH STATUS;
CREATE TABLE t1 (id INT PRIMARY KEY, a VARCHAR(100), b INT,
INDEX b(b)) ENGINE=rocksdb;
INSERT INTO t1 (id,a,b) VALUES (1,'foobar',100),(2,'z',0),(3,'bar',50);
SHOW SESSION STATUS LIKE 'Handler_write%';
Variable_name Value
Handler_write 3
UPDATE t1 SET b=1000 WHERE id=1;
SHOW SESSION STATUS LIKE 'Handler_update%';
Variable_name Value
Handler_update 1
DELETE FROM t1 WHERE id=2;
SHOW SESSION STATUS LIKE 'Handler_delete%';
Variable_name Value
Handler_delete 1
INSERT INTO t1 (id,b) VALUES(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(10,10);
SHOW SESSION STATUS LIKE 'Handler_write%';
Variable_name Value
Handler_write 10
FLUSH STATUS;
SELECT * FROM t1 WHERE id=8;
id a b
8 NULL 8
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
FLUSH STATUS;
SET GLOBAL rocksdb_force_flush_memtable_and_lzero_now=1;
SELECT * FROM t1 WHERE b=6;
id a b
6 NULL 6
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 1
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM t1;
id a b
1 foobar 1000
10 NULL 10
3 bar 50
4 NULL 4
5 NULL 5
6 NULL 6
7 NULL 7
8 NULL 8
9 NULL 9
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 0
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 10
FLUSH STATUS;
SELECT * FROM t1 FORCE INDEX(b) WHERE b <=5 ORDER BY b;
id a b
4 NULL 4
5 NULL 5
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 2
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM t1 WHERE id >=8 ORDER BY id;
id a b
8 NULL 8
9 NULL 9
10 NULL 10
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 3
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
FLUSH STATUS;
SELECT * FROM t1 WHERE id < 8 ORDER BY id;
id a b
1 foobar 1000
3 bar 50
4 NULL 4
5 NULL 5
6 NULL 6
7 NULL 7
SHOW SESSION STATUS LIKE 'Handler_read%';
Variable_name Value
Handler_read_first 1
Handler_read_key 0
Handler_read_last 0
Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
DROP TABLE t1;
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