mirror of
https://github.com/MariaDB/server.git
synced 2025-11-10 23:02:54 +03:00
e36c5ec0a5
Lots of changes: * calculate the current history partition in ::external_lock(), not in ::write_row() or ::update_row() * remove dynamically collected per-partition row_end stats * no full table scan in open_table_from_share to calculate these stats, no manual MDL/thr_locks in open_table_from_share * no shared stats in TABLE_SHARE = no mutexes or condition waits when calculating current history partition * always compare timestamps, don't convert them to MYSQL_TIME (avoid DST ambiguity, and it's faster too) * correct interval handling, 1 month = 1 month, not 30 * 24 * 3600 seconds * save/restore first partition start time, and count intervals from there * only allow to drop first partitions if INTERVAL * when adding new history partitions, split the data in the last history parition, if it was overflowed * show partition boundaries in INFORMATION_SCHEMA.PARTITIONS
79 lines
1.9 KiB
Plaintext
79 lines
1.9 KiB
Plaintext
create table t (a int);
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delete history from t before system_time now();
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ERROR HY000: Table `t` is not system-versioned
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create or replace table t (a int) with system versioning;
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insert into t values (1);
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update t set a=2;
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set @test = 'correct';
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create trigger trg_before before delete on t for each row set @test = 'incorrect';
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create trigger trg_after after delete on t for each row set @test = 'incorrect';
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delete history from t;
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select @test from t;
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@test
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correct
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drop table t;
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create table t (a int) with system versioning;
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insert into t values (1), (2);
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update t set a=11 where a=1;
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set @ts1=now(6);
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update t set a=22 where a=2;
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select * from t for system_time all;
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a
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11
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22
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1
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2
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delete history from t before system_time timestamp @ts1;
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select * from t for system_time all;
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a
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11
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22
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2
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prepare stmt from 'delete history from t';
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execute stmt;
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drop prepare stmt;
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select * from t for system_time all;
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a
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11
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22
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delete from t;
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create or replace procedure truncate_sp()
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begin
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delete history from t before system_time timestamp now(6);
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end~~
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call truncate_sp;
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select * from t for system_time all;
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a
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drop procedure truncate_sp;
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# Truncate partitioned
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create or replace table t (a int)
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with system versioning
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engine myisam
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partition by system_time limit 1 (
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partition p0 history,
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partition p1 history,
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partition pn current);
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insert into t values (1);
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update t set a= 2;
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update t set a= 3;
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delete history from t;
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select * from t for system_time all;
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a
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3
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# VIEW
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create or replace table t (i int) with system versioning;
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delete history from t;
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create or replace view v as select * from t;
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delete history from v;
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ERROR HY000: DELETE HISTORY from VIEW is prohibited
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create or replace table t (i int);
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delete history from t;
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ERROR HY000: Table `t` is not system-versioned
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create or replace view v as select * from t;
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delete history from v;
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ERROR HY000: DELETE HISTORY from VIEW is prohibited
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prepare stmt from 'delete history from t';
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ERROR HY000: Table `t` is not system-versioned
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drop table t;
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drop view v;
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