mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-20 09:07:44 +03:00
46 lines
1.0 KiB
Plaintext
46 lines
1.0 KiB
Plaintext
DROP DATABASE IF EXISTS mcs286_db;
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CREATE DATABASE mcs286_db;
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USE mcs286_db;
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CREATE TABLE t1 (a INT, b CHAR(15))ENGINE=Columnstore;
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INSERT INTO t1 VALUES (NULL, ''),(1, 'mariadb'),(2, 'columnstore'),(3, 'Innodb');
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SELECT LEFT('mariadb cs', 7) FROM t1 LIMIT 1;
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LEFT('mariadb cs', 7)
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mariadb
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SELECT LEFT('mariadb cs', 8) FROM t1 LIMIT 1;
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LEFT('mariadb cs', 8)
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mariadb
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SELECT LEFT('mariadb cs', 9) FROM t1 LIMIT 1;
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LEFT('mariadb cs', 9)
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mariadb c
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SELECT b, LEFT(b, 0) FROM t1 ORDER BY 1;
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b LEFT(b, 0)
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NULL NULL
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columnstore NULL
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Innodb NULL
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mariadb NULL
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SELECT b, LEFT(b, -1) FROM t1 ORDER BY 1;
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b LEFT(b, -1)
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NULL NULL
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columnstore
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Innodb
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mariadb
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SELECT b, LEFT(b, 6) FROM t1 ORDER BY 1;
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b LEFT(b, 6)
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NULL NULL
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columnstore column
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Innodb Innodb
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mariadb mariad
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SELECT b, LEFT(b, 9) FROM t1 ORDER BY 1;
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b LEFT(b, 9)
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NULL NULL
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columnstore columnsto
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Innodb Innodb
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mariadb mariadb
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SELECT b, LEFT(concat('mmm_', b), 10) FROM t1 ORDER BY 1;
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b LEFT(concat('mmm_', b), 10)
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NULL NULL
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columnstore mmm_column
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Innodb mmm_Innodb
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mariadb mmm_mariad
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DROP DATABASE mcs286_db;
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