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f94cec6447
pg_tables already includes partitioned tables, so for consistency pg_indexes should show partitioned indexes. Author: Suraj Kharage Reviewed-by: Amit Langote, Michael Paquier Discussion: https://postgr.es/m/CAF1DzPVrYo4XNTEnc=PqVp6aLJc7LFYpYR4rX=_5pV=wJ2KdZg@mail.gmail.com
758 lines
36 KiB
SQL
758 lines
36 KiB
SQL
-- Creating an index on a partitioned table makes the partitions
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-- automatically get the index
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create table idxpart (a int, b int, c text) partition by range (a);
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-- relhassubclass of a partitioned index is false before creating any partition.
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-- It will be set after the first partition is created.
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create index idxpart_idx on idxpart (a);
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select relhassubclass from pg_class where relname = 'idxpart_idx';
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-- Check that partitioned indexes are present in pg_indexes.
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select indexdef from pg_indexes where indexname like 'idxpart_idx%';
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drop index idxpart_idx;
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create table idxpart1 partition of idxpart for values from (0) to (10);
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create table idxpart2 partition of idxpart for values from (10) to (100)
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partition by range (b);
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create table idxpart21 partition of idxpart2 for values from (0) to (100);
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-- Even with partitions, relhassubclass should not be set if a partitioned
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-- index is created only on the parent.
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create index idxpart_idx on only idxpart(a);
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select relhassubclass from pg_class where relname = 'idxpart_idx';
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drop index idxpart_idx;
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create index on idxpart (a);
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select relname, relkind, relhassubclass, inhparent::regclass
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from pg_class left join pg_index ix on (indexrelid = oid)
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left join pg_inherits on (ix.indexrelid = inhrelid)
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where relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- Some unsupported features
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create table idxpart (a int, b int, c text) partition by range (a);
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create table idxpart1 partition of idxpart for values from (0) to (10);
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create index concurrently on idxpart (a);
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drop table idxpart;
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-- Verify bugfix with query on indexed partitioned table with no partitions
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-- https://postgr.es/m/20180124162006.pmapfiznhgngwtjf@alvherre.pgsql
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CREATE TABLE idxpart (col1 INT) PARTITION BY RANGE (col1);
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CREATE INDEX ON idxpart (col1);
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CREATE TABLE idxpart_two (col2 INT);
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SELECT col2 FROM idxpart_two fk LEFT OUTER JOIN idxpart pk ON (col1 = col2);
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DROP table idxpart, idxpart_two;
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-- Verify bugfix with index rewrite on ALTER TABLE / SET DATA TYPE
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-- https://postgr.es/m/CAKcux6mxNCGsgATwf5CGMF8g4WSupCXicCVMeKUTuWbyxHOMsQ@mail.gmail.com
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CREATE TABLE idxpart (a INT, b TEXT, c INT) PARTITION BY RANGE(a);
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CREATE TABLE idxpart1 PARTITION OF idxpart FOR VALUES FROM (MINVALUE) TO (MAXVALUE);
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CREATE INDEX partidx_abc_idx ON idxpart (a, b, c);
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INSERT INTO idxpart (a, b, c) SELECT i, i, i FROM generate_series(1, 50) i;
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ALTER TABLE idxpart ALTER COLUMN c TYPE numeric;
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DROP TABLE idxpart;
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-- If a table without index is attached as partition to a table with
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-- an index, the index is automatically created
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create table idxpart (a int, b int, c text) partition by range (a);
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create index idxparti on idxpart (a);
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create index idxparti2 on idxpart (b, c);
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create table idxpart1 (like idxpart);
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\d idxpart1
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alter table idxpart attach partition idxpart1 for values from (0) to (10);
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\d idxpart1
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\d+ idxpart1_a_idx
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\d+ idxpart1_b_c_idx
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drop table idxpart;
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-- If a partition already has an index, don't create a duplicative one
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create table idxpart (a int, b int) partition by range (a, b);
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create table idxpart1 partition of idxpart for values from (0, 0) to (10, 10);
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create index on idxpart1 (a, b);
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create index on idxpart (a, b);
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\d idxpart1
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select relname, relkind, relhassubclass, inhparent::regclass
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from pg_class left join pg_index ix on (indexrelid = oid)
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left join pg_inherits on (ix.indexrelid = inhrelid)
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where relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- DROP behavior for partitioned indexes
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create table idxpart (a int) partition by range (a);
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create index on idxpart (a);
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create table idxpart1 partition of idxpart for values from (0) to (10);
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drop index idxpart1_a_idx; -- no way
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drop index idxpart_a_idx; -- both indexes go away
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select relname, relkind from pg_class
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where relname like 'idxpart%' order by relname;
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create index on idxpart (a);
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drop table idxpart1; -- the index on partition goes away too
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select relname, relkind from pg_class
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where relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- ALTER INDEX .. ATTACH, error cases
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create table idxpart (a int, b int) partition by range (a, b);
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create table idxpart1 partition of idxpart for values from (0, 0) to (10, 10);
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create index idxpart_a_b_idx on only idxpart (a, b);
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create index idxpart1_a_b_idx on idxpart1 (a, b);
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create index idxpart1_tst1 on idxpart1 (b, a);
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create index idxpart1_tst2 on idxpart1 using hash (a);
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create index idxpart1_tst3 on idxpart1 (a, b) where a > 10;
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alter index idxpart attach partition idxpart1;
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alter index idxpart_a_b_idx attach partition idxpart1;
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alter index idxpart_a_b_idx attach partition idxpart_a_b_idx;
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alter index idxpart_a_b_idx attach partition idxpart1_b_idx;
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alter index idxpart_a_b_idx attach partition idxpart1_tst1;
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alter index idxpart_a_b_idx attach partition idxpart1_tst2;
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alter index idxpart_a_b_idx attach partition idxpart1_tst3;
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-- OK
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alter index idxpart_a_b_idx attach partition idxpart1_a_b_idx;
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alter index idxpart_a_b_idx attach partition idxpart1_a_b_idx; -- quiet
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-- reject dupe
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create index idxpart1_2_a_b on idxpart1 (a, b);
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alter index idxpart_a_b_idx attach partition idxpart1_2_a_b;
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drop table idxpart;
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-- make sure everything's gone
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select indexrelid::regclass, indrelid::regclass
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from pg_index where indexrelid::regclass::text like 'idxpart%';
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-- Don't auto-attach incompatible indexes
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create table idxpart (a int, b int) partition by range (a);
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create table idxpart1 (a int, b int);
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create index on idxpart1 using hash (a);
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create index on idxpart1 (a) where b > 1;
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create index on idxpart1 ((a + 0));
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create index on idxpart1 (a, a);
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create index on idxpart (a);
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alter table idxpart attach partition idxpart1 for values from (0) to (1000);
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\d idxpart1
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drop table idxpart;
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-- If CREATE INDEX ONLY, don't create indexes on partitions; and existing
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-- indexes on partitions don't change parent. ALTER INDEX ATTACH can change
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-- the parent after the fact.
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create table idxpart (a int) partition by range (a);
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create table idxpart1 partition of idxpart for values from (0) to (100);
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create table idxpart2 partition of idxpart for values from (100) to (1000)
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partition by range (a);
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create table idxpart21 partition of idxpart2 for values from (100) to (200);
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create table idxpart22 partition of idxpart2 for values from (200) to (300);
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create index on idxpart22 (a);
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create index on only idxpart2 (a);
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create index on idxpart (a);
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-- Here we expect that idxpart1 and idxpart2 have a new index, but idxpart21
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-- does not; also, idxpart22 is not attached.
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\d idxpart1
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\d idxpart2
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\d idxpart21
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select indexrelid::regclass, indrelid::regclass, inhparent::regclass
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from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
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where indexrelid::regclass::text like 'idxpart%'
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order by indexrelid::regclass::text collate "C";
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alter index idxpart2_a_idx attach partition idxpart22_a_idx;
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select indexrelid::regclass, indrelid::regclass, inhparent::regclass
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from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
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where indexrelid::regclass::text like 'idxpart%'
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order by indexrelid::regclass::text collate "C";
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-- attaching idxpart22 is not enough to set idxpart22_a_idx valid ...
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alter index idxpart2_a_idx attach partition idxpart22_a_idx;
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\d idxpart2
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-- ... but this one is.
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create index on idxpart21 (a);
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alter index idxpart2_a_idx attach partition idxpart21_a_idx;
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\d idxpart2
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drop table idxpart;
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-- When a table is attached a partition and it already has an index, a
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-- duplicate index should not get created, but rather the index becomes
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-- attached to the parent's index.
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create table idxpart (a int, b int, c text) partition by range (a);
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create index idxparti on idxpart (a);
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create index idxparti2 on idxpart (b, c);
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create table idxpart1 (like idxpart including indexes);
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\d idxpart1
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select relname, relkind, inhparent::regclass
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from pg_class left join pg_index ix on (indexrelid = oid)
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left join pg_inherits on (ix.indexrelid = inhrelid)
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where relname like 'idxpart%' order by relname;
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alter table idxpart attach partition idxpart1 for values from (0) to (10);
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\d idxpart1
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select relname, relkind, inhparent::regclass
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from pg_class left join pg_index ix on (indexrelid = oid)
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left join pg_inherits on (ix.indexrelid = inhrelid)
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where relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- Verify that attaching an invalid index does not mark the parent index valid.
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-- On the other hand, attaching a valid index marks not only its direct
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-- ancestor valid, but also any indirect ancestor that was only missing the one
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-- that was just made valid
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create table idxpart (a int, b int) partition by range (a);
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create table idxpart1 partition of idxpart for values from (1) to (1000) partition by range (a);
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create table idxpart11 partition of idxpart1 for values from (1) to (100);
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create index on only idxpart1 (a);
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create index on only idxpart (a);
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-- this results in two invalid indexes:
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select relname, indisvalid from pg_class join pg_index on indexrelid = oid
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where relname like 'idxpart%' order by relname;
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-- idxpart1_a_idx is not valid, so idxpart_a_idx should not become valid:
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alter index idxpart_a_idx attach partition idxpart1_a_idx;
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select relname, indisvalid from pg_class join pg_index on indexrelid = oid
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where relname like 'idxpart%' order by relname;
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-- after creating and attaching this, both idxpart1_a_idx and idxpart_a_idx
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-- should become valid
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create index on idxpart11 (a);
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alter index idxpart1_a_idx attach partition idxpart11_a_idx;
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select relname, indisvalid from pg_class join pg_index on indexrelid = oid
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where relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- verify dependency handling during ALTER TABLE DETACH PARTITION
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create table idxpart (a int) partition by range (a);
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create table idxpart1 (like idxpart);
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create index on idxpart1 (a);
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create index on idxpart (a);
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create table idxpart2 (like idxpart);
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alter table idxpart attach partition idxpart1 for values from (0000) to (1000);
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alter table idxpart attach partition idxpart2 for values from (1000) to (2000);
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create table idxpart3 partition of idxpart for values from (2000) to (3000);
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select relname, relkind from pg_class where relname like 'idxpart%' order by relname;
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-- a) after detaching partitions, the indexes can be dropped independently
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alter table idxpart detach partition idxpart1;
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alter table idxpart detach partition idxpart2;
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alter table idxpart detach partition idxpart3;
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drop index idxpart1_a_idx;
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drop index idxpart2_a_idx;
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drop index idxpart3_a_idx;
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select relname, relkind from pg_class where relname like 'idxpart%' order by relname;
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drop table idxpart, idxpart1, idxpart2, idxpart3;
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select relname, relkind from pg_class where relname like 'idxpart%' order by relname;
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create table idxpart (a int) partition by range (a);
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create table idxpart1 (like idxpart);
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create index on idxpart1 (a);
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create index on idxpart (a);
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create table idxpart2 (like idxpart);
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alter table idxpart attach partition idxpart1 for values from (0000) to (1000);
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alter table idxpart attach partition idxpart2 for values from (1000) to (2000);
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create table idxpart3 partition of idxpart for values from (2000) to (3000);
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-- b) after detaching, dropping the index on parent does not remove the others
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select relname, relkind from pg_class where relname like 'idxpart%' order by relname;
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alter table idxpart detach partition idxpart1;
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alter table idxpart detach partition idxpart2;
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alter table idxpart detach partition idxpart3;
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drop index idxpart_a_idx;
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select relname, relkind from pg_class where relname like 'idxpart%' order by relname;
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drop table idxpart, idxpart1, idxpart2, idxpart3;
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select relname, relkind from pg_class where relname like 'idxpart%' order by relname;
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-- Verify that expression indexes inherit correctly
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create table idxpart (a int, b int) partition by range (a);
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create table idxpart1 (like idxpart);
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create index on idxpart1 ((a + b));
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create index on idxpart ((a + b));
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create table idxpart2 (like idxpart);
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alter table idxpart attach partition idxpart1 for values from (0000) to (1000);
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alter table idxpart attach partition idxpart2 for values from (1000) to (2000);
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create table idxpart3 partition of idxpart for values from (2000) to (3000);
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select relname as child, inhparent::regclass as parent, pg_get_indexdef as childdef
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from pg_class join pg_inherits on inhrelid = oid,
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lateral pg_get_indexdef(pg_class.oid)
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where relkind in ('i', 'I') and relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- Verify behavior for collation (mis)matches
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create table idxpart (a text) partition by range (a);
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create table idxpart1 (like idxpart);
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create table idxpart2 (like idxpart);
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create index on idxpart2 (a collate "POSIX");
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create index on idxpart2 (a);
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create index on idxpart2 (a collate "C");
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alter table idxpart attach partition idxpart1 for values from ('aaa') to ('bbb');
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alter table idxpart attach partition idxpart2 for values from ('bbb') to ('ccc');
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create table idxpart3 partition of idxpart for values from ('ccc') to ('ddd');
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create index on idxpart (a collate "C");
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create table idxpart4 partition of idxpart for values from ('ddd') to ('eee');
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select relname as child, inhparent::regclass as parent, pg_get_indexdef as childdef
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from pg_class left join pg_inherits on inhrelid = oid,
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lateral pg_get_indexdef(pg_class.oid)
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where relkind in ('i', 'I') and relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- Verify behavior for opclass (mis)matches
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create table idxpart (a text) partition by range (a);
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create table idxpart1 (like idxpart);
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create table idxpart2 (like idxpart);
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create index on idxpart2 (a);
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alter table idxpart attach partition idxpart1 for values from ('aaa') to ('bbb');
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alter table idxpart attach partition idxpart2 for values from ('bbb') to ('ccc');
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create table idxpart3 partition of idxpart for values from ('ccc') to ('ddd');
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create index on idxpart (a text_pattern_ops);
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create table idxpart4 partition of idxpart for values from ('ddd') to ('eee');
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-- must *not* have attached the index we created on idxpart2
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select relname as child, inhparent::regclass as parent, pg_get_indexdef as childdef
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from pg_class left join pg_inherits on inhrelid = oid,
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lateral pg_get_indexdef(pg_class.oid)
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where relkind in ('i', 'I') and relname like 'idxpart%' order by relname;
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drop index idxpart_a_idx;
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create index on only idxpart (a text_pattern_ops);
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-- must reject
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alter index idxpart_a_idx attach partition idxpart2_a_idx;
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drop table idxpart;
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-- Verify that attaching indexes maps attribute numbers correctly
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create table idxpart (col1 int, a int, col2 int, b int) partition by range (a);
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create table idxpart1 (b int, col1 int, col2 int, col3 int, a int);
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alter table idxpart drop column col1, drop column col2;
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alter table idxpart1 drop column col1, drop column col2, drop column col3;
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alter table idxpart attach partition idxpart1 for values from (0) to (1000);
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create index idxpart_1_idx on only idxpart (b, a);
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create index idxpart1_1_idx on idxpart1 (b, a);
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create index idxpart1_1b_idx on idxpart1 (b);
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-- test expressions and partial-index predicate, too
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create index idxpart_2_idx on only idxpart ((b + a)) where a > 1;
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create index idxpart1_2_idx on idxpart1 ((b + a)) where a > 1;
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create index idxpart1_2b_idx on idxpart1 ((a + b)) where a > 1;
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create index idxpart1_2c_idx on idxpart1 ((b + a)) where b > 1;
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alter index idxpart_1_idx attach partition idxpart1_1b_idx; -- fail
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alter index idxpart_1_idx attach partition idxpart1_1_idx;
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alter index idxpart_2_idx attach partition idxpart1_2b_idx; -- fail
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alter index idxpart_2_idx attach partition idxpart1_2c_idx; -- fail
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alter index idxpart_2_idx attach partition idxpart1_2_idx; -- ok
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select relname as child, inhparent::regclass as parent, pg_get_indexdef as childdef
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from pg_class left join pg_inherits on inhrelid = oid,
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lateral pg_get_indexdef(pg_class.oid)
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where relkind in ('i', 'I') and relname like 'idxpart%' order by relname;
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drop table idxpart;
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-- Make sure the partition columns are mapped correctly
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create table idxpart (a int, b int, c text) partition by range (a);
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create index idxparti on idxpart (a);
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create index idxparti2 on idxpart (c, b);
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create table idxpart1 (c text, a int, b int);
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alter table idxpart attach partition idxpart1 for values from (0) to (10);
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create table idxpart2 (c text, a int, b int);
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create index on idxpart2 (a);
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create index on idxpart2 (c, b);
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alter table idxpart attach partition idxpart2 for values from (10) to (20);
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select c.relname, pg_get_indexdef(indexrelid)
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from pg_class c join pg_index i on c.oid = i.indexrelid
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where indrelid::regclass::text like 'idxpart%'
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order by indexrelid::regclass::text collate "C";
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drop table idxpart;
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-- Verify that columns are mapped correctly in expression indexes
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create table idxpart (col1 int, col2 int, a int, b int) partition by range (a);
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create table idxpart1 (col2 int, b int, col1 int, a int);
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create table idxpart2 (col1 int, col2 int, b int, a int);
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alter table idxpart drop column col1, drop column col2;
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alter table idxpart1 drop column col1, drop column col2;
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alter table idxpart2 drop column col1, drop column col2;
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create index on idxpart2 (abs(b));
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alter table idxpart attach partition idxpart2 for values from (0) to (1);
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create index on idxpart (abs(b));
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create index on idxpart ((b + 1));
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alter table idxpart attach partition idxpart1 for values from (1) to (2);
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select c.relname, pg_get_indexdef(indexrelid)
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from pg_class c join pg_index i on c.oid = i.indexrelid
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where indrelid::regclass::text like 'idxpart%'
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order by indexrelid::regclass::text collate "C";
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drop table idxpart;
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-- Verify that columns are mapped correctly for WHERE in a partial index
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create table idxpart (col1 int, a int, col3 int, b int) partition by range (a);
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alter table idxpart drop column col1, drop column col3;
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create table idxpart1 (col1 int, col2 int, col3 int, col4 int, b int, a int);
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alter table idxpart1 drop column col1, drop column col2, drop column col3, drop column col4;
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alter table idxpart attach partition idxpart1 for values from (0) to (1000);
|
|
create table idxpart2 (col1 int, col2 int, b int, a int);
|
|
create index on idxpart2 (a) where b > 1000;
|
|
alter table idxpart2 drop column col1, drop column col2;
|
|
alter table idxpart attach partition idxpart2 for values from (1000) to (2000);
|
|
create index on idxpart (a) where b > 1000;
|
|
select c.relname, pg_get_indexdef(indexrelid)
|
|
from pg_class c join pg_index i on c.oid = i.indexrelid
|
|
where indrelid::regclass::text like 'idxpart%'
|
|
order by indexrelid::regclass::text collate "C";
|
|
drop table idxpart;
|
|
|
|
-- Column number mapping: dropped columns in the partition
|
|
create table idxpart1 (drop_1 int, drop_2 int, col_keep int, drop_3 int);
|
|
alter table idxpart1 drop column drop_1;
|
|
alter table idxpart1 drop column drop_2;
|
|
alter table idxpart1 drop column drop_3;
|
|
create index on idxpart1 (col_keep);
|
|
create table idxpart (col_keep int) partition by range (col_keep);
|
|
create index on idxpart (col_keep);
|
|
alter table idxpart attach partition idxpart1 for values from (0) to (1000);
|
|
\d idxpart
|
|
\d idxpart1
|
|
select attrelid::regclass, attname, attnum from pg_attribute
|
|
where attrelid::regclass::text like 'idxpart%' and attnum > 0
|
|
order by attrelid::regclass, attnum;
|
|
drop table idxpart;
|
|
|
|
-- Column number mapping: dropped columns in the parent table
|
|
create table idxpart(drop_1 int, drop_2 int, col_keep int, drop_3 int) partition by range (col_keep);
|
|
alter table idxpart drop column drop_1;
|
|
alter table idxpart drop column drop_2;
|
|
alter table idxpart drop column drop_3;
|
|
create table idxpart1 (col_keep int);
|
|
create index on idxpart1 (col_keep);
|
|
create index on idxpart (col_keep);
|
|
alter table idxpart attach partition idxpart1 for values from (0) to (1000);
|
|
\d idxpart
|
|
\d idxpart1
|
|
select attrelid::regclass, attname, attnum from pg_attribute
|
|
where attrelid::regclass::text like 'idxpart%' and attnum > 0
|
|
order by attrelid::regclass, attnum;
|
|
drop table idxpart;
|
|
|
|
--
|
|
-- Constraint-related indexes
|
|
--
|
|
|
|
-- Verify that it works to add primary key / unique to partitioned tables
|
|
create table idxpart (a int primary key, b int) partition by range (a);
|
|
\d idxpart
|
|
-- multiple primary key on child should fail
|
|
create table failpart partition of idxpart (b primary key) for values from (0) to (100);
|
|
drop table idxpart;
|
|
-- primary key on child is okay if there's no PK in the parent, though
|
|
create table idxpart (a int) partition by range (a);
|
|
create table idxpart1pk partition of idxpart (a primary key) for values from (0) to (100);
|
|
\d idxpart1pk
|
|
drop table idxpart;
|
|
|
|
-- Failing to use the full partition key is not allowed
|
|
create table idxpart (a int unique, b int) partition by range (a, b);
|
|
create table idxpart (a int, b int unique) partition by range (a, b);
|
|
create table idxpart (a int primary key, b int) partition by range (b, a);
|
|
create table idxpart (a int, b int primary key) partition by range (b, a);
|
|
|
|
-- OK if you use them in some other order
|
|
create table idxpart (a int, b int, c text, primary key (a, b, c)) partition by range (b, c, a);
|
|
drop table idxpart;
|
|
|
|
-- not other types of index-based constraints
|
|
create table idxpart (a int, exclude (a with = )) partition by range (a);
|
|
|
|
-- no expressions in partition key for PK/UNIQUE
|
|
create table idxpart (a int primary key, b int) partition by range ((b + a));
|
|
create table idxpart (a int unique, b int) partition by range ((b + a));
|
|
|
|
-- use ALTER TABLE to add a primary key
|
|
create table idxpart (a int, b int, c text) partition by range (a, b);
|
|
alter table idxpart add primary key (a); -- not an incomplete one though
|
|
alter table idxpart add primary key (a, b); -- this works
|
|
\d idxpart
|
|
create table idxpart1 partition of idxpart for values from (0, 0) to (1000, 1000);
|
|
\d idxpart1
|
|
drop table idxpart;
|
|
|
|
-- use ALTER TABLE to add a unique constraint
|
|
create table idxpart (a int, b int) partition by range (a, b);
|
|
alter table idxpart add unique (a); -- not an incomplete one though
|
|
alter table idxpart add unique (b, a); -- this works
|
|
\d idxpart
|
|
drop table idxpart;
|
|
|
|
-- Exclusion constraints cannot be added
|
|
create table idxpart (a int, b int) partition by range (a);
|
|
alter table idxpart add exclude (a with =);
|
|
drop table idxpart;
|
|
|
|
-- When (sub)partitions are created, they also contain the constraint
|
|
create table idxpart (a int, b int, primary key (a, b)) partition by range (a, b);
|
|
create table idxpart1 partition of idxpart for values from (1, 1) to (10, 10);
|
|
create table idxpart2 partition of idxpart for values from (10, 10) to (20, 20)
|
|
partition by range (b);
|
|
create table idxpart21 partition of idxpart2 for values from (10) to (15);
|
|
create table idxpart22 partition of idxpart2 for values from (15) to (20);
|
|
create table idxpart3 (b int not null, a int not null);
|
|
alter table idxpart attach partition idxpart3 for values from (20, 20) to (30, 30);
|
|
select conname, contype, conrelid::regclass, conindid::regclass, conkey
|
|
from pg_constraint where conrelid::regclass::text like 'idxpart%'
|
|
order by conname;
|
|
drop table idxpart;
|
|
|
|
-- Verify that multi-layer partitioning honors the requirement that all
|
|
-- columns in the partition key must appear in primary/unique key
|
|
create table idxpart (a int, b int, primary key (a)) partition by range (a);
|
|
create table idxpart2 partition of idxpart
|
|
for values from (0) to (1000) partition by range (b); -- fail
|
|
drop table idxpart;
|
|
|
|
-- Ditto for the ATTACH PARTITION case
|
|
create table idxpart (a int unique, b int) partition by range (a);
|
|
create table idxpart1 (a int not null, b int, unique (a, b))
|
|
partition by range (a, b);
|
|
alter table idxpart attach partition idxpart1 for values from (1) to (1000);
|
|
DROP TABLE idxpart, idxpart1;
|
|
|
|
-- Multi-layer partitioning works correctly in this case:
|
|
create table idxpart (a int, b int, primary key (a, b)) partition by range (a);
|
|
create table idxpart2 partition of idxpart for values from (0) to (1000) partition by range (b);
|
|
create table idxpart21 partition of idxpart2 for values from (0) to (1000);
|
|
select conname, contype, conrelid::regclass, conindid::regclass, conkey
|
|
from pg_constraint where conrelid::regclass::text like 'idxpart%'
|
|
order by conname;
|
|
drop table idxpart;
|
|
|
|
-- If a partitioned table has a unique/PK constraint, then it's not possible
|
|
-- to drop the corresponding constraint in the children; nor it's possible
|
|
-- to drop the indexes individually. Dropping the constraint in the parent
|
|
-- gets rid of the lot.
|
|
create table idxpart (i int) partition by hash (i);
|
|
create table idxpart0 partition of idxpart (i) for values with (modulus 2, remainder 0);
|
|
create table idxpart1 partition of idxpart (i) for values with (modulus 2, remainder 1);
|
|
alter table idxpart0 add primary key(i);
|
|
alter table idxpart add primary key(i);
|
|
select indrelid::regclass, indexrelid::regclass, inhparent::regclass, indisvalid,
|
|
conname, conislocal, coninhcount, connoinherit, convalidated
|
|
from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
|
|
left join pg_constraint con on (idx.indexrelid = con.conindid)
|
|
where indrelid::regclass::text like 'idxpart%'
|
|
order by indexrelid::regclass::text collate "C";
|
|
drop index idxpart0_pkey; -- fail
|
|
drop index idxpart1_pkey; -- fail
|
|
alter table idxpart0 drop constraint idxpart0_pkey; -- fail
|
|
alter table idxpart1 drop constraint idxpart1_pkey; -- fail
|
|
alter table idxpart drop constraint idxpart_pkey; -- ok
|
|
select indrelid::regclass, indexrelid::regclass, inhparent::regclass, indisvalid,
|
|
conname, conislocal, coninhcount, connoinherit, convalidated
|
|
from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
|
|
left join pg_constraint con on (idx.indexrelid = con.conindid)
|
|
where indrelid::regclass::text like 'idxpart%'
|
|
order by indexrelid::regclass::text collate "C";
|
|
drop table idxpart;
|
|
|
|
-- If the partition to be attached already has a primary key, fail if
|
|
-- it doesn't match the parent's PK.
|
|
CREATE TABLE idxpart (c1 INT PRIMARY KEY, c2 INT, c3 VARCHAR(10)) PARTITION BY RANGE(c1);
|
|
CREATE TABLE idxpart1 (LIKE idxpart);
|
|
ALTER TABLE idxpart1 ADD PRIMARY KEY (c1, c2);
|
|
ALTER TABLE idxpart ATTACH PARTITION idxpart1 FOR VALUES FROM (100) TO (200);
|
|
DROP TABLE idxpart, idxpart1;
|
|
|
|
-- Ditto if there is some distance between the PKs (subpartitioning)
|
|
create table idxpart (a int, b int, primary key (a)) partition by range (a);
|
|
create table idxpart1 (a int not null, b int) partition by range (a);
|
|
create table idxpart11 (a int not null, b int primary key);
|
|
alter table idxpart1 attach partition idxpart11 for values from (0) to (1000);
|
|
alter table idxpart attach partition idxpart1 for values from (0) to (10000);
|
|
drop table idxpart, idxpart1, idxpart11;
|
|
|
|
-- If a partitioned table has a constraint whose index is not valid,
|
|
-- attaching a missing partition makes it valid.
|
|
create table idxpart (a int) partition by range (a);
|
|
create table idxpart0 (like idxpart);
|
|
alter table idxpart0 add primary key (a);
|
|
alter table idxpart attach partition idxpart0 for values from (0) to (1000);
|
|
alter table only idxpart add primary key (a);
|
|
select indrelid::regclass, indexrelid::regclass, inhparent::regclass, indisvalid,
|
|
conname, conislocal, coninhcount, connoinherit, convalidated
|
|
from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
|
|
left join pg_constraint con on (idx.indexrelid = con.conindid)
|
|
where indrelid::regclass::text like 'idxpart%'
|
|
order by indexrelid::regclass::text collate "C";
|
|
alter index idxpart_pkey attach partition idxpart0_pkey;
|
|
select indrelid::regclass, indexrelid::regclass, inhparent::regclass, indisvalid,
|
|
conname, conislocal, coninhcount, connoinherit, convalidated
|
|
from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
|
|
left join pg_constraint con on (idx.indexrelid = con.conindid)
|
|
where indrelid::regclass::text like 'idxpart%'
|
|
order by indexrelid::regclass::text collate "C";
|
|
drop table idxpart;
|
|
|
|
-- if a partition has a unique index without a constraint, does not attach
|
|
-- automatically; creates a new index instead.
|
|
create table idxpart (a int, b int) partition by range (a);
|
|
create table idxpart1 (a int not null, b int);
|
|
create unique index on idxpart1 (a);
|
|
alter table idxpart add primary key (a);
|
|
alter table idxpart attach partition idxpart1 for values from (1) to (1000);
|
|
select indrelid::regclass, indexrelid::regclass, inhparent::regclass, indisvalid,
|
|
conname, conislocal, coninhcount, connoinherit, convalidated
|
|
from pg_index idx left join pg_inherits inh on (idx.indexrelid = inh.inhrelid)
|
|
left join pg_constraint con on (idx.indexrelid = con.conindid)
|
|
where indrelid::regclass::text like 'idxpart%'
|
|
order by indexrelid::regclass::text collate "C";
|
|
drop table idxpart;
|
|
|
|
-- Can't attach an index without a corresponding constraint
|
|
create table idxpart (a int, b int) partition by range (a);
|
|
create table idxpart1 (a int not null, b int);
|
|
create unique index on idxpart1 (a);
|
|
alter table idxpart attach partition idxpart1 for values from (1) to (1000);
|
|
alter table only idxpart add primary key (a);
|
|
alter index idxpart_pkey attach partition idxpart1_a_idx; -- fail
|
|
drop table idxpart;
|
|
|
|
-- Test that unique constraints are working
|
|
create table idxpart (a int, b text, primary key (a, b)) partition by range (a);
|
|
create table idxpart1 partition of idxpart for values from (0) to (100000);
|
|
create table idxpart2 (c int, like idxpart);
|
|
insert into idxpart2 (c, a, b) values (42, 572814, 'inserted first');
|
|
alter table idxpart2 drop column c;
|
|
create unique index on idxpart (a);
|
|
alter table idxpart attach partition idxpart2 for values from (100000) to (1000000);
|
|
insert into idxpart values (0, 'zero'), (42, 'life'), (2^16, 'sixteen');
|
|
insert into idxpart select 2^g, format('two to power of %s', g) from generate_series(15, 17) g;
|
|
insert into idxpart values (16, 'sixteen');
|
|
insert into idxpart (b, a) values ('one', 142857), ('two', 285714);
|
|
insert into idxpart select a * 2, b || b from idxpart where a between 2^16 and 2^19;
|
|
insert into idxpart values (572814, 'five');
|
|
insert into idxpart values (857142, 'six');
|
|
select tableoid::regclass, * from idxpart order by a;
|
|
drop table idxpart;
|
|
|
|
-- test fastpath mechanism for index insertion
|
|
create table fastpath (a int, b text, c numeric);
|
|
create unique index fpindex1 on fastpath(a);
|
|
|
|
insert into fastpath values (1, 'b1', 100.00);
|
|
insert into fastpath values (1, 'b1', 100.00); -- unique key check
|
|
|
|
truncate fastpath;
|
|
insert into fastpath select generate_series(1,10000), 'b', 100;
|
|
|
|
-- vacuum the table so as to improve chances of index-only scans. we can't
|
|
-- guarantee if index-only scans will be picked up in all cases or not, but
|
|
-- that fuzziness actually helps the test.
|
|
vacuum fastpath;
|
|
|
|
set enable_seqscan to false;
|
|
set enable_bitmapscan to false;
|
|
|
|
select sum(a) from fastpath where a = 6456;
|
|
select sum(a) from fastpath where a >= 5000 and a < 5700;
|
|
|
|
-- drop the only index on the table and compute hashes for
|
|
-- a few queries which orders the results in various different ways.
|
|
drop index fpindex1;
|
|
truncate fastpath;
|
|
insert into fastpath select y.x, 'b' || (y.x/10)::text, 100 from (select generate_series(1,10000) as x) y;
|
|
select md5(string_agg(a::text, b order by a, b asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by a desc, b desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
|
|
-- now create a multi-column index with both column asc
|
|
create index fpindex2 on fastpath(a, b);
|
|
truncate fastpath;
|
|
insert into fastpath select y.x, 'b' || (y.x/10)::text, 100 from (select generate_series(1,10000) as x) y;
|
|
-- again, vacuum here either forces index-only scans or creates fuzziness
|
|
vacuum fastpath;
|
|
select md5(string_agg(a::text, b order by a, b asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by a desc, b desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
|
|
-- same queries with a different kind of index now. the final result must not
|
|
-- change irrespective of what kind of index we have.
|
|
drop index fpindex2;
|
|
create index fpindex3 on fastpath(a desc, b asc);
|
|
truncate fastpath;
|
|
insert into fastpath select y.x, 'b' || (y.x/10)::text, 100 from (select generate_series(1,10000) as x) y;
|
|
vacuum fastpath;
|
|
select md5(string_agg(a::text, b order by a, b asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by a desc, b desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
|
|
-- repeat again
|
|
drop index fpindex3;
|
|
create index fpindex4 on fastpath(a asc, b desc);
|
|
truncate fastpath;
|
|
insert into fastpath select y.x, 'b' || (y.x/10)::text, 100 from (select generate_series(1,10000) as x) y;
|
|
vacuum fastpath;
|
|
select md5(string_agg(a::text, b order by a, b asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by a desc, b desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
|
|
-- and again, this time indexing by (b, a). Note that column "b" has non-unique
|
|
-- values.
|
|
drop index fpindex4;
|
|
create index fpindex5 on fastpath(b asc, a desc);
|
|
truncate fastpath;
|
|
insert into fastpath select y.x, 'b' || (y.x/10)::text, 100 from (select generate_series(1,10000) as x) y;
|
|
vacuum fastpath;
|
|
select md5(string_agg(a::text, b order by a, b asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by a desc, b desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
|
|
-- one last time
|
|
drop index fpindex5;
|
|
create index fpindex6 on fastpath(b desc, a desc);
|
|
truncate fastpath;
|
|
insert into fastpath select y.x, 'b' || (y.x/10)::text, 100 from (select generate_series(1,10000) as x) y;
|
|
vacuum fastpath;
|
|
select md5(string_agg(a::text, b order by a, b asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by a desc, b desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a desc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
select md5(string_agg(a::text, b order by b, a asc)) from fastpath
|
|
where a >= 1000 and a < 2000 and b > 'b1' and b < 'b3';
|
|
|
|
drop table fastpath;
|
|
|
|
-- intentionally leave some objects around
|
|
create table idxpart (a int) partition by range (a);
|
|
create table idxpart1 partition of idxpart for values from (0) to (100);
|
|
create table idxpart2 partition of idxpart for values from (100) to (1000)
|
|
partition by range (a);
|
|
create table idxpart21 partition of idxpart2 for values from (100) to (200);
|
|
create table idxpart22 partition of idxpart2 for values from (200) to (300);
|
|
create index on idxpart22 (a);
|
|
create index on only idxpart2 (a);
|
|
alter index idxpart2_a_idx attach partition idxpart22_a_idx;
|
|
create index on idxpart (a);
|
|
create table idxpart_another (a int, b int, primary key (a, b)) partition by range (a);
|
|
create table idxpart_another_1 partition of idxpart_another for values from (0) to (100);
|
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-- Test that covering partitioned indexes work in various cases
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create table covidxpart (a int, b int) partition by list (a);
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create unique index on covidxpart (a) include (b);
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create table covidxpart1 partition of covidxpart for values in (1);
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create table covidxpart2 partition of covidxpart for values in (2);
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insert into covidxpart values (1, 1);
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insert into covidxpart values (1, 1);
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create table covidxpart3 (b int, c int, a int);
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alter table covidxpart3 drop c;
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alter table covidxpart attach partition covidxpart3 for values in (3);
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insert into covidxpart values (3, 1);
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insert into covidxpart values (3, 1);
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create table covidxpart4 (b int, a int);
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create unique index on covidxpart4 (a) include (b);
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create unique index on covidxpart4 (a);
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alter table covidxpart attach partition covidxpart4 for values in (4);
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insert into covidxpart values (4, 1);
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insert into covidxpart values (4, 1);
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