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6294516a56
* implicit period constraint is hidden and cannot be dropped independently * create...like and create...select support
175 lines
6.3 KiB
Plaintext
175 lines
6.3 KiB
Plaintext
set @s= '1992-01-01';
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set @e= '1999-12-31';
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create or replace table t (s date, e date);
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# period start/end columns are implicit NOT NULL
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alter table t add period for a(s, e);
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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PERIOD FOR `a` (`s`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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create or replace table t (s date, e date);
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alter table t change s s date, add period for a(s, e);
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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PERIOD FOR `a` (`s`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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alter table t add id int;
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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`id` int(11) DEFAULT NULL,
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PERIOD FOR `a` (`s`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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alter table t drop id;
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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PERIOD FOR `a` (`s`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert t values(@e, @s);
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ERROR 23000: CONSTRAINT `a` failed for `test`.`t`
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alter table t drop constraint a;
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ERROR HY000: Can't DROP CONSTRAINT `a`. Use DROP PERIOD `a` for this
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# no-op
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alter table t drop period if exists for b;
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Warnings:
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Note 1091 Can't DROP PERIOD `b`; check that it exists
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# no-op
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alter table t add period if not exists for a(e, s);
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Warnings:
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Note 1060 Duplicate column name 'a'
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alter table t drop period if exists for a;
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# no-op
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alter table t drop period if exists for a;
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Warnings:
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Note 1091 Can't DROP PERIOD `a`; check that it exists
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alter table t add period for a(s, e), add period if not exists for a(e, s);
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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PERIOD FOR `a` (`s`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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alter table t drop period for a;
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# Constraint is dropped
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insert t values(@e, @s);
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alter table t drop period for a;
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ERROR 42000: Can't DROP PERIOD `a`; check that it exists
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alter table t add period for a(s, e), drop period for a;
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ERROR 42000: Can't DROP PERIOD `a`; check that it exists
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truncate t;
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alter table t add period for a(s, e);
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insert t values(@e, @s);
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ERROR 23000: CONSTRAINT `a` failed for `test`.`t`
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alter table t add period for a(s, e), drop period for a;
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insert t values(@e, @s);
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ERROR 23000: CONSTRAINT `a` failed for `test`.`t`
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alter table t add s1 date not null, add period for b(s1, e), drop period for a;
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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`s1` date NOT NULL,
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PERIOD FOR `b` (`s1`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert t(s, s1, e) values(@e, @s, @e);
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insert t(s, s1, e) values(@e, @e, @s);
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ERROR 23000: CONSTRAINT `b` failed for `test`.`t`
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create table t1 like t;
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`s` date NOT NULL,
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`e` date NOT NULL,
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`s1` date NOT NULL,
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PERIOD FOR `b` (`s1`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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create table t2 (period for b(s,e)) select * from t;
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ERROR 23000: CONSTRAINT `b` failed for `test`.`t2`
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create table t2 (period for b(s1,e)) select * from t;
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# SQL16 11.27 <add table period definition>, Syntax Rules, 5)g)
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# The declared type of BC1 shall be either DATE or a timestamp type
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# and shall be equivalent to the declared type of BC2.
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create or replace table t (s timestamp not null, e timestamp(6) not null);
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alter table t add period for a(s, e);
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ERROR HY000: Fields of PERIOD FOR `a` have different types
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# SQL16 11.27 <add table period definition>, Syntax Rules, 5)c)
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# No column of T shall have a column name that is equivalent to ATPN.
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create or replace table t (a int, s date, e date);
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alter table t add period for a(s, e);
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ERROR 42S21: Duplicate column name 'a'
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# SQL16 11.27 <add table period definition>, Syntax Rules, 5)i)
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# Neither BC1 nor BC2 shall be an identity column, a generated column,
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# a system-time period start column, or a system-time period end column.
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create or replace table t (id int primary key,
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s date,
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e date generated always as (s+1));
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alter table t add period for a(s, e);
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ERROR HY000: Period field `e` cannot be GENERATED ALWAYS AS
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create or replace table t (id int primary key,
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s date,
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e date as (s+1) VIRTUAL);
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alter table t add period for a(s, e);
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ERROR HY000: Period field `e` cannot be GENERATED ALWAYS AS
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create or replace table t (id int primary key, s timestamp(6), e timestamp(6),
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st timestamp(6) as row start,
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en timestamp(6) as row end,
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period for system_time (st, en)) with system versioning;
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alter table t add period for a(s, en);
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ERROR HY000: Period field `en` cannot be GENERATED ALWAYS AS
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# SQL16 11.27 <add table period definition>, Syntax Rules, 5)b)
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# The table descriptor of T shall not include a period descriptor other
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# than a system-time period descriptor.
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alter table t add period for a(s, e);
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alter table t add period for b(s, e);
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ERROR HY000: Cannot specify more than one application-time period
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# SQL16, Part 2, 11.3 <table definition>, Syntax Rules, 2)e)v)2)B)
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# Let S be the schema identified by the explicit or implicit
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# <schema name> of TN. Let IDCN be an implementation-dependent
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# <constraint name> that is not equivalent to the <constraint name> of
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# any table constraint descriptor included in S. The following
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# <table constraint definition> is implicit:
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# CONSTRAINT IDCN CHECK ( CN1 < CN2 )
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#
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# Due to the above standard limitation, the constraint name can't always
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# match the period name. So it matches when possible; and when not, it
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# is unique not taken name prefixed with period name.
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create or replace table t (x int, s date, e date,
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period for mytime(s, e));
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`x` int(11) DEFAULT NULL,
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`s` date NOT NULL,
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`e` date NOT NULL,
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PERIOD FOR `mytime` (`s`, `e`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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alter table t add constraint mytime check (x > 1);
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`x` int(11) DEFAULT NULL,
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`s` date NOT NULL,
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`e` date NOT NULL,
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PERIOD FOR `mytime` (`s`, `e`),
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CONSTRAINT `mytime` CHECK (`x` > 1)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert t values (2, @e, @s);
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ERROR 23000: CONSTRAINT `mytime_1` failed for `test`.`t`
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alter table t add constraint mytime_1 check (x > 2);
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insert t values (3, @e, @s);
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ERROR 23000: CONSTRAINT `mytime_2` failed for `test`.`t`
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create or replace database test;
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