mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-05-28 13:01:26 +03:00
89 lines
2.2 KiB
Plaintext
89 lines
2.2 KiB
Plaintext
DROP DATABASE IF EXISTS mcol_4222_db;
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CREATE DATABASE mcol_4222_db;
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USE mcol_4222_db;
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CREATE TABLE t1_i (
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`C_` varchar(100) DEFAULT NULL
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) ENGINE=innodb DEFAULT CHARSET=utf8 ;
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CREATE TABLE t1_cs (
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`C_` varchar(100) DEFAULT NULL
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) ENGINE=columnstore DEFAULT CHARSET=utf8 ;
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CREATE PROCEDURE generate_data()
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BEGIN NOT ATOMIC
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DECLARE i INT DEFAULT 0;
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TRUNCATE TABLE t1_i;
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TRUNCATE TABLE t1_cs;
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START TRANSACTION;
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WHILE i < 70000 DO
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INSERT INTO t1_i VALUES (i);
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SET i = i + 1;
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END WHILE;
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COMMIT;
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END//
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CALL generate_data();
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INSERT INTO t1_cs SELECT * FROM t1_i;
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SELECT COUNT(*), SUM(t1_i.C_ IS NULL) FROM t1_i;
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COUNT(*) SUM(t1_i.C_ IS NULL)
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70000 0
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SELECT COUNT(*), SUM(t1_cs.C_ IS NULL) FROM t1_cs;
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COUNT(*) SUM(t1_cs.C_ IS NULL)
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70000 0
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CREATE TABLE t2 LIKE t1_i;
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INSERT INTO t2 SELECT * FROM (SELECT * FROM t1_cs) derived;
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SELECT COUNT(*), SUM(C_ IS NULL) FROM t2;
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COUNT(*) SUM(C_ IS NULL)
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70000 0
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DROP TABLE t2;
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CREATE TABLE t2 LIKE t1_cs;
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INSERT INTO t2 SELECT * FROM (SELECT * FROM t1_i) derived;
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SELECT COUNT(*), SUM(C_ IS NULL) FROM t2;
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COUNT(*) SUM(C_ IS NULL)
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70000 0
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DROP TABLE t2;
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CREATE TABLE t2 LIKE t1_cs;
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INSERT INTO t2 SELECT * FROM (SELECT * FROM t1_cs) derived;
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SELECT COUNT(*), SUM(C_ IS NULL) FROM t2;
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COUNT(*) SUM(C_ IS NULL)
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70000 0
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DROP TABLE t2;
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DROP TABLE IF EXISTS t1_i;
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DROP TABLE IF EXISTS t1_cs;
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CREATE TABLE t1_i (
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`C_` varchar(100) NOT NULL DEFAULT 123
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) ENGINE=innodb DEFAULT CHARSET=utf8 ;
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CREATE TABLE t1_cs (
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`C_` varchar(100) NOT NULL DEFAULT 123
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) ENGINE=columnstore DEFAULT CHARSET=utf8 ;
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CALL generate_data();
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INSERT INTO t1_cs SELECT * FROM t1_i;
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SELECT COUNT(*), SUM(t1_i.C_ IS NULL) FROM t1_i;
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COUNT(*) SUM(t1_i.C_ IS NULL)
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70000 0
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SELECT COUNT(*), SUM(t1_cs.C_ IS NULL) FROM t1_cs;
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COUNT(*) SUM(t1_cs.C_ IS NULL)
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70000 0
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CREATE TABLE t2 LIKE t1_i;
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INSERT INTO t2 SELECT * FROM (SELECT * FROM t1_cs) derived;
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SELECT * FROM t2 LIMIT 3;
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C_
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0
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1
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2
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DROP TABLE t2;
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CREATE TABLE t2 LIKE t1_cs;
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INSERT INTO t2 SELECT * FROM (SELECT * FROM t1_i) derived;
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SELECT * FROM t2 LIMIT 3;
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C_
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0
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1
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2
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DROP TABLE t2;
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CREATE TABLE t2 LIKE t1_cs;
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INSERT INTO t2 SELECT * FROM (SELECT * FROM t1_cs) derived;
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SELECT * FROM t2 LIMIT 3;
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C_
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0
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1
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2
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DROP TABLE t2;
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DROP DATABASE mcol_4222_db;
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