104 lines
3.2 KiB
Plaintext
104 lines
3.2 KiB
Plaintext
--
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-- WITHOUT OID
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--
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--
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-- This test tries to verify that WITHOUT OIDS actually saves space.
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-- On machines where MAXALIGN is 8, WITHOUT OIDS may or may not save any
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-- space, depending on the size of the tuple header + null bitmap.
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-- As of 8.3 we need a null bitmap of 8 or less bits for the difference
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-- to appear.
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--
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CREATE TABLE wi (i INT,
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n1 int, n2 int, n3 int, n4 int,
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n5 int, n6 int, n7 int) WITH OIDS;
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CREATE TABLE wo (i INT,
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n1 int, n2 int, n3 int, n4 int,
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n5 int, n6 int, n7 int) WITHOUT OIDS;
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INSERT INTO wi VALUES (1); -- 1
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INSERT INTO wo SELECT i FROM wi; -- 1
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INSERT INTO wo SELECT i+1 FROM wi; -- 1+1=2
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INSERT INTO wi SELECT i+1 FROM wo; -- 1+2=3
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INSERT INTO wi SELECT i+3 FROM wi; -- 3+3=6
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INSERT INTO wo SELECT i+2 FROM wi; -- 2+6=8
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INSERT INTO wo SELECT i+8 FROM wo; -- 8+8=16
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INSERT INTO wi SELECT i+6 FROM wo; -- 6+16=22
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INSERT INTO wi SELECT i+22 FROM wi; -- 22+22=44
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INSERT INTO wo SELECT i+16 FROM wi; -- 16+44=60
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INSERT INTO wo SELECT i+60 FROM wo; -- 60+60=120
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INSERT INTO wi SELECT i+44 FROM wo; -- 44+120=164
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INSERT INTO wi SELECT i+164 FROM wi; -- 164+164=328
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INSERT INTO wo SELECT i+120 FROM wi; -- 120+328=448
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INSERT INTO wo SELECT i+448 FROM wo; -- 448+448=896
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INSERT INTO wi SELECT i+328 FROM wo; -- 328+896=1224
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INSERT INTO wi SELECT i+1224 FROM wi; -- 1224+1224=2448
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INSERT INTO wo SELECT i+896 FROM wi; -- 896+2448=3344
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INSERT INTO wo SELECT i+3344 FROM wo; -- 3344+3344=6688
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INSERT INTO wi SELECT i+2448 FROM wo; -- 2448+6688=9136
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INSERT INTO wo SELECT i+6688 FROM wi WHERE i<=2448; -- 6688+2448=9136
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SELECT count(oid) FROM wi;
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count
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-------
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9136
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(1 row)
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-- should fail
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SELECT count(oid) FROM wo;
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ERROR: column "oid" does not exist
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LINE 1: SELECT count(oid) FROM wo;
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^
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VACUUM ANALYZE wi;
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VACUUM ANALYZE wo;
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SELECT min(relpages) < max(relpages), min(reltuples) - max(reltuples)
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FROM pg_class
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WHERE relname IN ('wi', 'wo');
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?column? | ?column?
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----------+----------
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t | 0
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(1 row)
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DROP TABLE wi;
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DROP TABLE wo;
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--
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-- WITH / WITHOUT OIDS in CREATE TABLE AS
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--
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CREATE TABLE create_table_test (
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a int,
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b int
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);
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COPY create_table_test FROM stdin;
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CREATE TABLE create_table_test2 WITH OIDS AS
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SELECT a + b AS c1, a - b AS c2 FROM create_table_test;
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CREATE TABLE create_table_test3 WITHOUT OIDS AS
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SELECT a + b AS c1, a - b AS c2 FROM create_table_test;
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SELECT count(oid) FROM create_table_test2;
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count
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-------
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2
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(1 row)
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-- should fail
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SELECT count(oid) FROM create_table_test3;
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ERROR: column "oid" does not exist
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LINE 1: SELECT count(oid) FROM create_table_test3;
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^
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PREPARE table_source(int) AS
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SELECT a + b AS c1, a - b AS c2, $1 AS c3 FROM create_table_test;
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CREATE TABLE execute_with WITH OIDS AS EXECUTE table_source(1);
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CREATE TABLE execute_without WITHOUT OIDS AS EXECUTE table_source(2);
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SELECT count(oid) FROM execute_with;
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count
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-------
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2
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(1 row)
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-- should fail
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SELECT count(oid) FROM execute_without;
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ERROR: column "oid" does not exist
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LINE 1: SELECT count(oid) FROM execute_without;
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^
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DROP TABLE create_table_test;
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DROP TABLE create_table_test2;
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DROP TABLE create_table_test3;
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DROP TABLE execute_with;
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DROP TABLE execute_without;
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