238 lines
10 KiB
PL/PgSQL
238 lines
10 KiB
PL/PgSQL
set datestyle = 'ISO, MDY';
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create materialized view pg_partition_before_truncate as
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select oid, relname, reloptions, parentid, boundaries
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from pg_partition where parentid = (
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select oid from pg_class where relname like 'tg_%'
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);
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create view check_truncate_results as
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select pg_class.relname tablename,
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bef.relname relname,
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bef.oid < aft.oid oid_changed,
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bef.parentid = aft.parentid parentid_ok,
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bef.boundaries = aft.boundaries boundaries_ok
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from pg_partition_before_truncate bef, pg_partition aft, pg_class
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where bef.relname = aft.relname
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and bef.parentid = aft.parentid
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and bef.parentid = pg_class.oid
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order by bef.oid;
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-- range
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create table tg_range(a date, b int)
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partition by range(a)
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(
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partition p1 values less than ('2022-01-31 00:00:00'),
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partition p2 values less than ('2022-02-28 00:00:00'),
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partition p3 values less than ('2022-03-31 00:00:00')
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);
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create index i_tg_range_global_b on tg_range(b) global;
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create index i_tg_range_global_a_b on tg_range(a,b) global;
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create index i_tg_range_local_a on tg_range(a) local;
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insert into tg_range select '2022-1-5'::date+n1*'1 month'::interval+10*n2*'1 day'::interval, 10*(n1+1)+(n2+1) from generate_series(0,2) t1(n1), generate_series(0,2) t2(n2);
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refresh materialized view pg_partition_before_truncate;
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begin;
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alter table tg_range truncate partition p1 update global index;
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alter table tg_range truncate partition p2 update global index;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_range') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_range') order by oid;
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select * from check_truncate_results where tablename = 'tg_range';
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select * from tg_range;
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explain(costs off) select /*+ indexscan(tg_range i_tg_range_global_b) */ * from tg_range where b < 40;
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select /*+ indexscan(tg_range i_tg_range_global_b) */ * from tg_range where b < 40;
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explain(costs off) select /*+ indexscan(tg_range i_tg_range_local_a) */ * from tg_range where a < '2022-03-31 00:00:00';
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select /*+ indexscan(tg_range i_tg_range_local_a) */ * from tg_range where a < '2022-03-31 00:00:00';
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rollback;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_range') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_range') order by oid;
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select * from check_truncate_results where tablename = 'tg_range';
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select * from tg_range;
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explain(costs off) select /*+ indexscan(tg_range i_tg_range_global_b) */ * from tg_range where b < 40;
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select /*+ indexscan(tg_range i_tg_range_global_b) */ * from tg_range where b < 40;
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explain(costs off) select /*+ indexscan(tg_range i_tg_range_local_a) */ * from tg_range where a < '2022-03-31 00:00:00';
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select /*+ indexscan(tg_range i_tg_range_local_a) */ * from tg_range where a < '2022-03-31 00:00:00';
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drop table tg_range;
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-- range without gpi
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create table tg_range_no_gpi(a date, b int)
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partition by range(a)
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(
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partition p1 values less than ('2022-01-31 00:00:00'),
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partition p2 values less than ('2022-02-28 00:00:00'),
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partition p3 values less than ('2022-03-31 00:00:00')
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);
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insert into tg_range_no_gpi select '2022-1-5'::date+n1*'1 month'::interval+10*n2*'1 day'::interval, 10*(n1+1)+(n2+1) from generate_series(0,2) t1(n1), generate_series(0,2) t2(n2);
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refresh materialized view pg_partition_before_truncate;
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alter table tg_range_no_gpi truncate partition p1 update global index;
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alter table tg_range_no_gpi truncate partition p2 update global index;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_range_no_gpi') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_range_no_gpi') order by oid;
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select * from check_truncate_results where tablename = 'tg_range_no_gpi';
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select * from tg_range_no_gpi;
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drop table tg_range_no_gpi;
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-- list
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create table tg_list(a int, b int)
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partition by list(a)
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(
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partition p1 values (0,3,6),
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partition p2 values (1,4,7),
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partition p3 values (default)
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);
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create index i_tg_list_global_b on tg_list(b) global;
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create index i_tg_list_global_a_b on tg_list(a,b) global;
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create index i_tg_list_local_a on tg_list(a) local;
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insert into tg_list select a,b from generate_series(0,8) t1(a), generate_series(0,8) t2(b);
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refresh materialized view pg_partition_before_truncate;
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begin;
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alter table tg_list truncate partition p1 update global index;
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alter table tg_list truncate partition p2 update global index;
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alter table tg_list truncate partition p3 update global index;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_list') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_list') order by oid;
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select * from check_truncate_results where tablename = 'tg_list';
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select * from tg_list;
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explain(costs off) select /*+ indexscan(tg_list i_tg_list_global_b) */ * from tg_list where b < 9;
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select /*+ indexscan(tg_list i_tg_list_global_b) */ * from tg_list where b < 9;
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explain(costs off) select /*+ indexscan(tg_list i_tg_list_local_a) */ * from tg_list where a < 9;
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select /*+ indexscan(tg_list i_tg_list_local_a) */ * from tg_list where a << 9;
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rollback;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_list') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_list') order by oid;
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select * from check_truncate_results where tablename = 'tg_list';
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select * from tg_list;
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explain(costs off) select /*+ indexscan(tg_list i_tg_list_global_b) */ * from tg_list where b < 9;
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select /*+ indexscan(tg_list i_tg_list_global_b) */ * from tg_list where b < 9;
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explain(costs off) select /*+ indexscan(tg_list i_tg_list_local_a) */ * from tg_list where a < 9;
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select /*+ indexscan(tg_list i_tg_list_local_a) */ * from tg_list where a < 9;
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drop table tg_list;
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-- hash
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create table tg_hash(a int, b int)
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partition by hash(a)
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(
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partition p1,
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partition p2,
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partition p3
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);
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create index i_tg_hash_global_b on tg_hash(b) global;
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create index i_tg_hash_global_a_b on tg_hash(a,b) global;
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create index i_tg_hash_local_a on tg_hash(a) local;
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insert into tg_hash select a,b from generate_series(0,8) t1(a), generate_series(0,8) t2(b);
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refresh materialized view pg_partition_before_truncate;
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begin;
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alter table tg_hash truncate partition p1 update global index;
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alter table tg_hash truncate partition p2 update global index;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_hash') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_hash') order by oid;
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select * from check_truncate_results where tablename = 'tg_hash';
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select * from tg_hash;
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explain(costs off) select /*+ indexscan(tg_hash i_tg_hash_global_b) */ * from tg_hash where b < 9;
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select /*+ indexscan(tg_hash i_tg_hash_global_b) */ * from tg_hash where b < 9;
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explain(costs off) select /*+ indexscan(tg_hash i_tg_hash_local_a) */ * from tg_hash where a < 9;
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select /*+ indexscan(tg_hash i_tg_hash_local_a) */ * from tg_hash where a << 9;
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rollback;
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select relname, reloptions, boundaries from pg_partition_before_truncate
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where parentid = (select oid from pg_class where relname = 'tg_hash') order by oid;
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select relname, reloptions, boundaries from pg_partition
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where parentid = (select oid from pg_class where relname = 'tg_hash') order by oid;
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select * from check_truncate_results where tablename = 'tg_hash';
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select * from tg_hash;
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explain(costs off) select /*+ indexscan(tg_hash i_tg_hash_global_b) */ * from tg_hash where b < 9;
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select /*+ indexscan(tg_hash i_tg_hash_global_b) */ * from tg_hash where b < 9;
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explain(costs off) select /*+ indexscan(tg_hash i_tg_hash_local_a) */ * from tg_hash where a < 9;
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select /*+ indexscan(tg_hash i_tg_hash_local_a) */ * from tg_hash where a < 9;
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drop table tg_hash;
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drop table if exists test_ugi_045;
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create table test_ugi_045
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(
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c_id integer not null,
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c_date DATE,
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c_info varchar(20) not null
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)
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partition by range(c_date)
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interval('2 day')
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(
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partition p1 values less than ('2021-06-01 00:00:00'),
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partition p2 values less than ('2021-06-03 00:00:00'),
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partition p3 values less than ('2021-06-05 00:00:00'),
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partition p4 values less than ('2021-06-07 00:00:00'),
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partition p5 values less than ('2021-06-09 00:00:00')
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);
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insert into test_ugi_045(c_id, c_date, c_info) values(1, '2021-05-30 00:00:00', '1-1');
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insert into test_ugi_045(c_id, c_date, c_info) values(2, '2021-05-31 00:00:00', '1-1');
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insert into test_ugi_045(c_id, c_date, c_info) values(3, '2021-06-01 00:00:00', '1-1');
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insert into test_ugi_045(c_id, c_date, c_info) values(4, '2021-06-02 00:00:00', '1-2');
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insert into test_ugi_045(c_id, c_date, c_info) values(5, '2021-06-03 00:00:00', '1-2');
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insert into test_ugi_045(c_id, c_date, c_info) values(6, '2021-06-04 00:00:00', '1-3');
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insert into test_ugi_045(c_id, c_date, c_info) values(7, '2021-06-05 00:00:00', '1-3');
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insert into test_ugi_045(c_id, c_date, c_info) values(8, '2021-06-06 00:00:00', '1-4');
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insert into test_ugi_045(c_id, c_date, c_info) values(9, '2021-06-07 00:00:00', '1-4');
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insert into test_ugi_045(c_id, c_date, c_info) values(10, '2021-06-08 00:00:00', '1-5');
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create index global_index_id_045 on test_ugi_045(c_date) global;
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create index global_index_info_045 on test_ugi_045(c_info) global;
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select *from test_ugi_045;
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alter table test_ugi_045 truncate partition p3 update global index;
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set enable_seqscan = off;
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set enable_bitmapscan = off;
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select *from test_ugi_045;
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select *from test_ugi_045 where c_info = '1-2';
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drop table if exists test_ugi_045;
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-- 清理过程
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drop view check_truncate_results;
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drop materialized view pg_partition_before_truncate;
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