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7ce9b7c0d8
proposal for eventually deprecating OIDs on user tables that I posted earlier to pgsql-hackers. pg_dump now always specifies WITH OIDS or WITHOUT OIDS when dumping a table. The documentation has been updated. Neil Conway
35 lines
1.3 KiB
SQL
35 lines
1.3 KiB
SQL
--
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-- WITHOUT OID
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--
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CREATE TABLE wi (i INT) WITH OIDS;
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CREATE TABLE wo (i 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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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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DROP TABLE wi;
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DROP TABLE wo;
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