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PARTITION BY SYSTEM_TIME INTERVAL ...

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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
This commit is contained in:
Sergei Golubchik
2018-02-21 15:16:19 +01:00
parent 7961bc4b89
commit e36c5ec0a5
16 changed files with 463 additions and 974 deletions
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72
mysql-test/suite/versioning/t/partition.test
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@@ -139,10 +139,6 @@ prepare select_pn from @str;
execute select_p0;
execute select_pn;
--echo ## pruning check
--replace_regex /\d/N/ /ALL/system/ /Using where//
explain partitions select * from t1;
set @str= concat('select row_start from t1 partition (pn) into @ts0');
prepare stmt from @str; execute stmt; drop prepare stmt;
@@ -212,14 +208,14 @@ show create table t1;
--error ER_DROP_PARTITION_NON_EXISTENT
alter table t1 drop partition non_existent;
insert into t1 values (1), (2), (3);
insert into t1 values (1), (2), (3), (4), (5), (6);
select * from t1 partition (pn);
--echo ### warn about partition switching
delete from t1 where x < 4;
delete from t1;
select * from t1 partition (p0);
select * from t1 partition (p1);
insert into t1 values (4), (5);
insert into t1 values (7), (8);
--echo ### warn about full partition
delete from t1;
select * from t1 partition (p1) order by x;
@@ -241,6 +237,14 @@ partition by system_time interval 0 second (
partition p1 history,
partition pn current);
--error ER_PARSE_ERROR
create or replace table t1 (x int)
with system versioning
partition by system_time interval 1 second starts 12345 (
partition p0 history,
partition p1 history,
partition pn current);
--echo ### ha_partition::update_row() check
create or replace table t1 (x int)
with system versioning
@@ -288,7 +292,9 @@ insert into t1 (x) values (1), (2), (3), (4), (5);
select * from t1 partition (pnsp0);
select * from t1 partition (pnsp1);
--echo ### warn about partition switching and about full partition
--echo ### warn about full partition
delete from t1 where x < 3;
delete from t1;
delete from t1;
select * from t1 partition (p0sp0);
select * from t1 partition (p0sp1);
@@ -384,6 +390,56 @@ alter table t1 add partition (partition p1 history);
insert into t1 values (1);
unlock tables;
--error ER_DATA_OUT_OF_RANGE
create or replace table t1 (pk int) with system versioning
partition by system_time interval 10 year (
partition p1 history,
partition p2 history,
partition pn current
);
# INTERVAL and ALTER TABLE
create or replace table t1 (i int) with system versioning
partition by system_time interval 1 hour (
partition p0 history, partition pn current);
set @ts=(select partition_description from information_schema.partitions
where table_schema='test' and table_name='t1' and partition_name='p0');
alter table t1 add column b int;
select partition_name,partition_ordinal_position,partition_method,timediff(partition_description, @ts) from information_schema.partitions where table_schema='test' and table_name='t1';
alter table t1 add partition (partition p1 history, partition p2 history);
select partition_name,partition_ordinal_position,partition_method,timediff(partition_description, @ts) from information_schema.partitions where table_schema='test' and table_name='t1';
alter table t1 drop partition p0;
select partition_name,partition_ordinal_position,partition_method,timediff(partition_description, @ts) from information_schema.partitions where table_schema='test' and table_name='t1';
--error ER_VERS_DROP_PARTITION_INTERVAL
alter table t1 drop partition p2;
select partition_name,partition_ordinal_position,partition_method,timediff(partition_description, @ts) from information_schema.partitions where table_schema='test' and table_name='t1';
create or replace table t1 (i int) with system versioning
partition by system_time interval 1 second
subpartition by key (i) subpartitions 2
(partition p1 history, partition pn current);
insert t1 values (1); delete from t1;
sleep 1;
insert t1 values (2); delete from t1;
alter table t1 add partition (partition p0 history, partition p2 history);
select subpartition_name,table_rows from information_schema.partitions where table_schema='test' and table_name='t1';
--echo ## pruning check
set @ts=(select partition_description from information_schema.partitions
where table_schema='test' and table_name='t1' and partition_name='p0' limit 1);
insert into t1 values (4),(5);
--sorted_result
select * from t1;
explain partitions select * from t1;
--replace_column 10 #
explain partitions select * from t1 for system_time as of from_unixtime(@ts);
set @ts=(select row_end from t1 for system_time all where i=1);
select * from t1 for system_time all where row_end = @ts;
--replace_column 5 # 10 # 11 #
explain partitions select * from t1 for system_time all where row_end = @ts;
--echo # Test cleanup
drop database test;
create database test;