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Any tuples that don't route to any other partition will route to the default partition. Jeevan Ladhe, Beena Emerson, Ashutosh Bapat, Rahila Syed, and Robert Haas, with review and testing at various stages by (at least) Rushabh Lathia, Keith Fiske, Amit Langote, Amul Sul, Rajkumar Raghuanshi, Sven Kunze, Kyotaro Horiguchi, Thom Brown, Rafia Sabih, and Dilip Kumar. Discussion: http://postgr.es/m/CAH2L28tbN4SYyhS7YV1YBWcitkqbhSWfQCy0G=apRcC_PEO-bg@mail.gmail.com Discussion: http://postgr.es/m/CAOG9ApEYj34fWMcvBMBQ-YtqR9fTdXhdN82QEKG0SVZ6zeL1xg@mail.gmail.com
179 lines
4.2 KiB
PL/PgSQL
179 lines
4.2 KiB
PL/PgSQL
--
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-- Tests to exercise the plan caching/invalidation mechanism
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--
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CREATE TEMP TABLE pcachetest AS SELECT * FROM int8_tbl;
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-- create and use a cached plan
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PREPARE prepstmt AS SELECT * FROM pcachetest;
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EXECUTE prepstmt;
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-- and one with parameters
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PREPARE prepstmt2(bigint) AS SELECT * FROM pcachetest WHERE q1 = $1;
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EXECUTE prepstmt2(123);
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-- invalidate the plans and see what happens
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DROP TABLE pcachetest;
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EXECUTE prepstmt;
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EXECUTE prepstmt2(123);
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-- recreate the temp table (this demonstrates that the raw plan is
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-- purely textual and doesn't depend on OIDs, for instance)
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CREATE TEMP TABLE pcachetest AS SELECT * FROM int8_tbl ORDER BY 2;
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EXECUTE prepstmt;
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EXECUTE prepstmt2(123);
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-- prepared statements should prevent change in output tupdesc,
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-- since clients probably aren't expecting that to change on the fly
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ALTER TABLE pcachetest ADD COLUMN q3 bigint;
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EXECUTE prepstmt;
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EXECUTE prepstmt2(123);
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-- but we're nice guys and will let you undo your mistake
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ALTER TABLE pcachetest DROP COLUMN q3;
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EXECUTE prepstmt;
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EXECUTE prepstmt2(123);
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-- Try it with a view, which isn't directly used in the resulting plan
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-- but should trigger invalidation anyway
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CREATE TEMP VIEW pcacheview AS
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SELECT * FROM pcachetest;
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PREPARE vprep AS SELECT * FROM pcacheview;
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EXECUTE vprep;
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CREATE OR REPLACE TEMP VIEW pcacheview AS
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SELECT q1, q2/2 AS q2 FROM pcachetest;
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EXECUTE vprep;
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-- Check basic SPI plan invalidation
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create function cache_test(int) returns int as $$
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declare total int;
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begin
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create temp table t1(f1 int);
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insert into t1 values($1);
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insert into t1 values(11);
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insert into t1 values(12);
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insert into t1 values(13);
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select sum(f1) into total from t1;
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drop table t1;
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return total;
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end
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$$ language plpgsql;
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select cache_test(1);
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select cache_test(2);
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select cache_test(3);
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-- Check invalidation of plpgsql "simple expression"
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create temp view v1 as
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select 2+2 as f1;
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create function cache_test_2() returns int as $$
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begin
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return f1 from v1;
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end$$ language plpgsql;
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select cache_test_2();
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create or replace temp view v1 as
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select 2+2+4 as f1;
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select cache_test_2();
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create or replace temp view v1 as
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select 2+2+4+(select max(unique1) from tenk1) as f1;
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select cache_test_2();
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--- Check that change of search_path is honored when re-using cached plan
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create schema s1
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create table abc (f1 int);
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create schema s2
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create table abc (f1 int);
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insert into s1.abc values(123);
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insert into s2.abc values(456);
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set search_path = s1;
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prepare p1 as select f1 from abc;
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execute p1;
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set search_path = s2;
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select f1 from abc;
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execute p1;
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alter table s1.abc add column f2 float8; -- force replan
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execute p1;
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drop schema s1 cascade;
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drop schema s2 cascade;
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reset search_path;
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-- Check that invalidation deals with regclass constants
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create temp sequence seq;
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prepare p2 as select nextval('seq');
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execute p2;
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drop sequence seq;
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create temp sequence seq;
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execute p2;
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-- Check DDL via SPI, immediately followed by SPI plan re-use
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-- (bug in original coding)
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create function cachebug() returns void as $$
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declare r int;
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begin
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drop table if exists temptable cascade;
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create temp table temptable as select * from generate_series(1,3) as f1;
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create temp view vv as select * from temptable;
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for r in select * from vv loop
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raise notice '%', r;
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end loop;
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end$$ language plpgsql;
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select cachebug();
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select cachebug();
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-- Check that addition or removal of any partition is correctly dealt with by
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-- default partition table when it is being used in prepared statement.
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create table list_parted (a int) partition by list(a);
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create table list_part_null partition of list_parted for values in (null);
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create table list_part_1 partition of list_parted for values in (1);
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create table list_part_def partition of list_parted default;
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prepare pstmt_def_insert (int) as insert into list_part_def values($1);
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-- should fail
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execute pstmt_def_insert(null);
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execute pstmt_def_insert(1);
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create table list_part_2 partition of list_parted for values in (2);
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execute pstmt_def_insert(2);
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alter table list_parted detach partition list_part_null;
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-- should be ok
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execute pstmt_def_insert(null);
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drop table list_part_1;
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-- should be ok
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execute pstmt_def_insert(1);
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drop table list_parted, list_part_null;
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deallocate pstmt_def_insert;
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