mirror of
https://github.com/MariaDB/server.git
synced 2025-05-28 13:01:41 +03:00
206 lines
5.2 KiB
Plaintext
206 lines
5.2 KiB
Plaintext
set default_storage_engine=innodb;
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create or replace table dept (
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dept_id int(10) primary key,
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name varchar(100)
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)
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with system versioning;
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create or replace table emp (
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emp_id int(10) primary key,
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dept_id int(10),
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name varchar(100),
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salary int(10),
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constraint `dept-emp-fk`
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foreign key (dept_id) references dept (dept_id)
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on delete restrict
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on update restrict
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)
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with system versioning;
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select now() into @ts_0;
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insert into dept (dept_id, name) values (10, "accounting");
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commit;
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select row_start into @ts_1 from dept where dept_id=10;
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insert into emp (emp_id, name, salary, dept_id) values (1, "bill", 1000, 10);
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commit;
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select row_start into @ts_2 from emp where name="bill";
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select * from emp;
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emp_id dept_id name salary
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1 10 bill 1000
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update emp set salary=2000 where name="bill";
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commit;
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select row_start into @ts_3 from emp where name="bill";
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select * from emp;
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emp_id dept_id name salary
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1 10 bill 2000
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select * from emp for system_time as of timestamp @ts_2;
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emp_id dept_id name salary
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1 10 bill 1000
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select * from emp for system_time as of timestamp @ts_3;
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emp_id dept_id name salary
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1 10 bill 2000
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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1 10 bill 2000 10 accounting
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select * from
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emp for system_time from timestamp @ts_1 to timestamp @ts_2 e,
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dept for system_time from timestamp @ts_1 to timestamp @ts_2 d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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set statement system_versioning_asof=@ts_0 for
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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set statement system_versioning_asof=@ts_1 for
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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set statement system_versioning_asof=@ts_2 for
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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1 10 bill 1000 10 accounting
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set statement system_versioning_asof=@ts_3 for
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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1 10 bill 2000 10 accounting
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drop table emp, dept;
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create table t1 (
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a timestamp(6),
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b timestamp(6) generated always as (a + interval 1 day),
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c timestamp(6) generated always as (a + interval 1 month) stored,
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d timestamp(6) generated always as row start,
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e timestamp(6) generated always as row end,
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period for system_time(d,e)
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) with system versioning;
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show columns from t1;
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Field Type Null Key Default Extra
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a timestamp(6) NO current_timestamp(6) on update current_timestamp(6)
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b timestamp(6) YES NULL VIRTUAL GENERATED
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c timestamp(6) YES NULL STORED GENERATED
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d timestamp(6) NO NULL STORED GENERATED
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e timestamp(6) NO NULL STORED GENERATED
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select *,'---' from information_schema.columns where table_name='t1';
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TABLE_CATALOG def
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TABLE_SCHEMA test
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TABLE_NAME t1
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COLUMN_NAME a
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ORDINAL_POSITION 1
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COLUMN_DEFAULT current_timestamp(6)
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IS_NULLABLE NO
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DATA_TYPE timestamp
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CHARACTER_MAXIMUM_LENGTH NULL
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CHARACTER_OCTET_LENGTH NULL
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NUMERIC_PRECISION NULL
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NUMERIC_SCALE NULL
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DATETIME_PRECISION 6
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CHARACTER_SET_NAME NULL
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COLLATION_NAME NULL
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COLUMN_TYPE timestamp(6)
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COLUMN_KEY
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EXTRA on update current_timestamp(6)
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PRIVILEGES select,insert,update,references
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COLUMN_COMMENT
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IS_GENERATED NEVER
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GENERATION_EXPRESSION NULL
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--- ---
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TABLE_CATALOG def
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TABLE_SCHEMA test
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TABLE_NAME t1
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COLUMN_NAME b
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ORDINAL_POSITION 2
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COLUMN_DEFAULT NULL
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IS_NULLABLE YES
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DATA_TYPE timestamp
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CHARACTER_MAXIMUM_LENGTH NULL
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CHARACTER_OCTET_LENGTH NULL
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NUMERIC_PRECISION NULL
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NUMERIC_SCALE NULL
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DATETIME_PRECISION 6
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CHARACTER_SET_NAME NULL
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COLLATION_NAME NULL
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COLUMN_TYPE timestamp(6)
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COLUMN_KEY
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EXTRA VIRTUAL GENERATED
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PRIVILEGES select,insert,update,references
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COLUMN_COMMENT
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IS_GENERATED ALWAYS
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GENERATION_EXPRESSION `a` + interval 1 day
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--- ---
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TABLE_CATALOG def
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TABLE_SCHEMA test
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TABLE_NAME t1
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COLUMN_NAME c
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ORDINAL_POSITION 3
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COLUMN_DEFAULT NULL
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IS_NULLABLE YES
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DATA_TYPE timestamp
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CHARACTER_MAXIMUM_LENGTH NULL
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CHARACTER_OCTET_LENGTH NULL
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NUMERIC_PRECISION NULL
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NUMERIC_SCALE NULL
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DATETIME_PRECISION 6
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CHARACTER_SET_NAME NULL
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COLLATION_NAME NULL
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COLUMN_TYPE timestamp(6)
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COLUMN_KEY
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EXTRA STORED GENERATED
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PRIVILEGES select,insert,update,references
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COLUMN_COMMENT
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IS_GENERATED ALWAYS
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GENERATION_EXPRESSION `a` + interval 1 month
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--- ---
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TABLE_CATALOG def
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TABLE_SCHEMA test
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TABLE_NAME t1
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COLUMN_NAME d
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ORDINAL_POSITION 4
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COLUMN_DEFAULT NULL
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IS_NULLABLE NO
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DATA_TYPE timestamp
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CHARACTER_MAXIMUM_LENGTH NULL
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CHARACTER_OCTET_LENGTH NULL
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NUMERIC_PRECISION NULL
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NUMERIC_SCALE NULL
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DATETIME_PRECISION 6
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CHARACTER_SET_NAME NULL
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COLLATION_NAME NULL
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COLUMN_TYPE timestamp(6)
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COLUMN_KEY
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EXTRA STORED GENERATED
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PRIVILEGES select,insert,update,references
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COLUMN_COMMENT
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IS_GENERATED ALWAYS
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GENERATION_EXPRESSION ROW START
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--- ---
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TABLE_CATALOG def
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TABLE_SCHEMA test
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TABLE_NAME t1
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COLUMN_NAME e
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ORDINAL_POSITION 5
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COLUMN_DEFAULT NULL
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IS_NULLABLE NO
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DATA_TYPE timestamp
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CHARACTER_MAXIMUM_LENGTH NULL
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CHARACTER_OCTET_LENGTH NULL
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NUMERIC_PRECISION NULL
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NUMERIC_SCALE NULL
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DATETIME_PRECISION 6
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CHARACTER_SET_NAME NULL
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COLLATION_NAME NULL
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COLUMN_TYPE timestamp(6)
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COLUMN_KEY
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EXTRA STORED GENERATED
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PRIVILEGES select,insert,update,references
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COLUMN_COMMENT
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IS_GENERATED ALWAYS
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GENERATION_EXPRESSION ROW END
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--- ---
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drop table t1;
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