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--
-- Tests to exercise the plan caching/invalidation mechanism
--
CREATE TEMP TABLE foo AS SELECT * FROM int8_tbl;
-- create and use a cached plan
PREPARE prepstmt AS SELECT * FROM foo;
EXECUTE prepstmt;
-- and one with parameters
PREPARE prepstmt2(bigint) AS SELECT * FROM foo WHERE q1 = $1;
EXECUTE prepstmt2(123);
-- invalidate the plans and see what happens
DROP TABLE foo;
EXECUTE prepstmt;
EXECUTE prepstmt2(123);
-- recreate the temp table (this demonstrates that the raw plan is
-- purely textual and doesn't depend on OIDs, for instance)
CREATE TEMP TABLE foo AS SELECT * FROM int8_tbl ORDER BY 2;
EXECUTE prepstmt;
EXECUTE prepstmt2(123);
-- prepared statements should prevent change in output tupdesc,
-- since clients probably aren't expecting that to change on the fly
ALTER TABLE foo ADD COLUMN q3 bigint;
EXECUTE prepstmt;
EXECUTE prepstmt2(123);
-- but we're nice guys and will let you undo your mistake
ALTER TABLE foo DROP COLUMN q3;
EXECUTE prepstmt;
EXECUTE prepstmt2(123);
-- Try it with a view, which isn't directly used in the resulting plan
-- but should trigger invalidation anyway
CREATE TEMP VIEW voo AS SELECT * FROM foo;
PREPARE vprep AS SELECT * FROM voo;
EXECUTE vprep;
CREATE OR REPLACE TEMP VIEW voo AS SELECT q1, q2/2 AS q2 FROM foo;
EXECUTE vprep;
-- Check basic SPI plan invalidation
create function cache_test(int) returns int as $$
declare total int;
begin
create temp table t1(f1 int);
insert into t1 values($1);
insert into t1 values(11);
insert into t1 values(12);
insert into t1 values(13);
select sum(f1) into total from t1;
drop table t1;
return total;
end
$$ language plpgsql;
select cache_test(1);
select cache_test(2);
select cache_test(3);
-- Check invalidation of plpgsql "simple expression"
create temp view v1 as
select 2+2 as f1;
create function cache_test_2() returns int as $$
begin
return f1 from v1;
end$$ language plpgsql;
select cache_test_2();
create or replace temp view v1 as
select 2+2+4 as f1;
select cache_test_2();
create or replace temp view v1 as
select 2+2+4+(select max(unique1) from tenk1) as f1;
select cache_test_2();
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