mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-05-02 19:24:47 +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.
33 lines
1.2 KiB
Plaintext
33 lines
1.2 KiB
Plaintext
--source ../include/have_columnstore.inc
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--disable_warnings
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DROP DATABASE IF EXISTS regr_fe_conv;
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--enable_warnings
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CREATE DATABASE regr_fe_conv;
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USE regr_fe_conv;
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--disable_query_log
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--source ../include/regression_create_dtypes.inc
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--enable_query_log
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select conv(dt, -10, -8) from dtypes where conv(dt, -10, -8) > 3731;
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select dtm from dtypes where conv(dtm, -10, -8) > 3731 order by dtm, conv(dtm, 10, 8);
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select conv(db, 10, 16), conv(ti, 8,16), conv(si, 16, 8), conv(i, 4, 8), conv(bi, 10, 8) from dtypes;
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select conv (c1, 5, 10), conv(substr(c8,2,4), 8, 10), conv(concat(vc1, vc2), 10,8) from dtypes;
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select substr(vc255,2,3), conv(substr(vc255,2,3),16,10) from dtypes where id < 50 ;
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#select conv(max(d182), 10, 20) from dtypes;
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#select conv(bi, 10, 24) from dtypes where id < 20;
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select conv (c1, 5, 2), conv(substr(c8,2,4), 8, 2), conv(concat(vc1, vc2), 10, 2) from dtypes;
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--disable_warnings
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drop table if exists bug3509;
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--enable_warnings
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create table bug3509 (cookie varchar(32), d_datekey date) engine=columnstore;
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insert into bug3509 values ('f48d2dce907ce3c54a9c12855754c0b5', 19980404);
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select conv(substr(cookie,1,12),16,10), conv(substr(cookie,1,16),16,10), conv(substr(cookie,1,16),18,10) from bug3509;
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drop table bug3509;
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DROP DATABASE regr_fe_conv;
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