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https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-20 09:07:44 +03:00
b53c231ca6
This patch improves handling of NULLs in textual fields in ColumnStore. Previously empty strings were considered NULLs and it could be a problem if data scheme allows for empty strings. It was also one of major reasons of behavior difference between ColumnStore and other engines in MariaDB family. Also, this patch fixes some other bugs and incorrect behavior, for example, incorrect comparison for "column <= ''" which evaluates to constant True for all purposes before this patch.
30 lines
907 B
Plaintext
30 lines
907 B
Plaintext
#
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# Test IF function
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# Author: Bharath, bharath.bokka@mariadb.com
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#
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-- source ../include/have_columnstore.inc
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--disable_warnings
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DROP DATABASE IF EXISTS mcs176_db;
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--enable_warnings
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CREATE DATABASE mcs176_db;
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USE mcs176_db;
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SET default_storage_engine=Columnstore;
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CREATE TABLE t1 (a CHAR(1), b INT, c DATETIME, d DOUBLE);
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INSERT INTO t1 VALUES (NULL, NULL, '0-0-0', NULL),('a', 12, '1212-12-12', 1.19691E+100),('b', 13, '1313-3-13 13:13:13', 2.1961E+18),('c', 14, '1414-4-14', 0.16191),('d', 15, '2015-5-15 15:15:15', 1.971917);
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--replace_regex /( COLLATE=latin1_swedish_ci)//
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SHOW CREATE TABLE t1;
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SELECT IF(10<20, 1, 2);
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SELECT IF(STRCMP("hello","hi") = 0, "YES", "NO");
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SELECT a, IF(a='b', 10, 20) AS result FROM t1;
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SELECT b, IF(b<=13, 'Less than or equal to 13', 'Greater than 13') AS result FROM t1;
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SELECT c, IF(c>0, 'date', 'zero date') AS result FROM t1;
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# Clean UP
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DROP DATABASE mcs176_db;
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