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db7edfed17
MDEV-10134 Add full support for DEFAULT - Added support for using tables with MySQL 5.7 virtual fields, including MySQL 5.7 syntax - Better error messages also for old cases - CREATE ... SELECT now also updates timestamp columns - Blob can now have default values - Added new system variable "check_constraint_checks", to turn of CHECK constraint checking if needed. - Removed some engine independent tests in suite vcol to only test myisam - Moved some tests from 'include' to 't'. Should some day be done for all tests. - FRM version increased to 11 if one uses virtual fields or constraints - Changed to use a bitmap to check if a field has got a value, instead of setting HAS_EXPLICIT_VALUE bit in field flags - Expressions can now be up to 65K in total - Ensure we are not refering to uninitialized fields when handling virtual fields or defaults - Changed check_vcol_func_processor() to return a bitmap of used types - Had to change some functions that calculated cached value in fix_fields to do this in val() or getdate() instead. - store_now_in_TIME() now takes a THD argument - fill_record() now updates default values - Add a lookahead for NOT NULL, to be able to handle DEFAULT 1+1 NOT NULL - Automatically generate a name for constraints that doesn't have a name - Added support for ALTER TABLE DROP CONSTRAINT - Ensure that partition functions register virtual fields used. This fixes some bugs when using virtual fields in a partitioning function
83 lines
2.3 KiB
Text
83 lines
2.3 KiB
Text
SET @@session.storage_engine = 'InnoDB';
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drop table if exists t1;
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# Case 1. Partitioning by RANGE based on a non-stored virtual column.
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CREATE TABLE t1 (
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a DATE NOT NULL,
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b int as (year(a))
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)
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PARTITION BY RANGE( b ) (
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PARTITION p0 VALUES LESS THAN (2006),
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PARTITION p2 VALUES LESS THAN (2008)
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);
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insert into t1 values ('2006-01-01',default);
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insert into t1 values ('2007-01-01',default);
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insert into t1 values ('2005-01-01',default);
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insert into t1 (a) values ('2007-01-02');
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select * from t1;
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a b
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2005-01-01 2005
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2006-01-01 2006
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2007-01-01 2007
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2007-01-02 2007
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 1 16384
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p2 3 16384
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# Modify the expression of virtual column b
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ALTER TABLE t1 modify b int as (year(a)-1);
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select * from t1;
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a b
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2005-01-01 2004
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2006-01-01 2005
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2007-01-01 2006
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2007-01-02 2006
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 2 16384
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p2 2 16384
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drop table t1;
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# Case 2. Partitioning by LIST based on a stored virtual column.
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CREATE TABLE t1 (a int, b int as (a % 3 ) persistent)
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PARTITION BY LIST (a+1)
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(PARTITION p1 VALUES IN (1), PARTITION p2 VALUES IN (2));
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insert into t1 values (1,default);
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p1 0 16384
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p2 1 16384
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select * from t1;
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a b
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1 1
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select * from t1;
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a b
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1 1
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drop table t1;
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# Case 3. Partitioning by HASH based on a non-stored virtual column.
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CREATE TABLE t1 (
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a DATE NOT NULL,
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b int as (year(a))
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)
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PARTITION BY HASH( b % 3 ) PARTITIONS 3;
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insert into t1 values ('2005-01-01',default);
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insert into t1 values ('2006-01-01',default);
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select * from t1;
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a b
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2005-01-01 2005
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2006-01-01 2006
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 0 16384
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p1 1 16384
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p2 1 16384
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# Modify the expression of virtual column b
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ALTER TABLE t1 modify b int as (year(a)-1);
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select * from t1;
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a b
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2005-01-01 2004
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2006-01-01 2005
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 1 16384
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p1 1 16384
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p2 0 16384
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drop table t1;
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