151 lines
4.8 KiB
SQL
151 lines
4.8 KiB
SQL
--
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-- Test GiST indexes.
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--
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-- There are other tests to test different GiST opclasses. This is for
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-- testing GiST code itself. Vacuuming in particular.
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create table gist_point_tbl(id int4, p point);
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create index gist_pointidx on gist_point_tbl using gist(p);
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-- Verify the fillfactor and buffering options
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create index gist_pointidx2 on gist_point_tbl using gist(p) with (buffering = on, fillfactor=50);
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create index gist_pointidx3 on gist_point_tbl using gist(p) with (buffering = off);
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create index gist_pointidx4 on gist_point_tbl using gist(p) with (buffering = auto);
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drop index gist_pointidx2, gist_pointidx3, gist_pointidx4;
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-- Make sure bad values are refused
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create index gist_pointidx5 on gist_point_tbl using gist(p) with (buffering = invalid_value);
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create index gist_pointidx5 on gist_point_tbl using gist(p) with (fillfactor=9);
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create index gist_pointidx5 on gist_point_tbl using gist(p) with (fillfactor=101);
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-- Insert enough data to create a tree that's a couple of levels deep.
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insert into gist_point_tbl (id, p)
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select g, point(g*10, g*10) from generate_series(1, 10000) g;
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insert into gist_point_tbl (id, p)
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select g+100000, point(g*10+1, g*10+1) from generate_series(1, 10000) g;
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-- To test vacuum, delete some entries from all over the index.
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delete from gist_point_tbl where id % 2 = 1;
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-- And also delete some concentration of values.
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delete from gist_point_tbl where id > 5000;
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vacuum analyze gist_point_tbl;
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-- rebuild the index with a different fillfactor
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alter index gist_pointidx SET (fillfactor = 40);
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reindex index gist_pointidx;
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--
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-- Test Index-only plans on GiST indexes
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--
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create table gist_tbl (b box, p point, c circle);
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insert into gist_tbl
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select box(point(0.05*i, 0.05*i), point(0.05*i, 0.05*i)),
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point(0.05*i, 0.05*i),
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circle(point(0.05*i, 0.05*i), 1.0)
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from generate_series(0,10000) as i;
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vacuum analyze gist_tbl;
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set enable_seqscan=off;
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set enable_bitmapscan=off;
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set enable_indexonlyscan=on;
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-- Test index-only scan with point opclass
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create index gist_tbl_point_index on gist_tbl using gist (p);
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-- check that the planner chooses an index-only scan
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explain (costs off)
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select p from gist_tbl where p <@ box(point(0,0), point(0.5, 0.5));
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-- execute the same
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select p from gist_tbl where p <@ box(point(0,0), point(0.5, 0.5));
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-- Also test an index-only knn-search
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explain (costs off)
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select p from gist_tbl where p <@ box(point(0,0), point(0.5, 0.5))
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order by p <-> point(0.201, 0.201);
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select p from gist_tbl where p <@ box(point(0,0), point(0.5, 0.5))
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order by p <-> point(0.201, 0.201);
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-- Check commuted case as well
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explain (costs off)
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select p from gist_tbl where p <@ box(point(0,0), point(0.5, 0.5))
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order by point(0.101, 0.101) <-> p;
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select p from gist_tbl where p <@ box(point(0,0), point(0.5, 0.5))
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order by point(0.101, 0.101) <-> p;
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-- Check case with multiple rescans (bug #14641)
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explain (costs off)
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select p from
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(values (box(point(0,0), point(0.5,0.5))),
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(box(point(0.5,0.5), point(0.75,0.75))),
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(box(point(0.8,0.8), point(1.0,1.0)))) as v(bb)
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cross join lateral
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(select p from gist_tbl where p <@ bb order by p <-> bb[0] limit 2) ss;
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select p from
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(values (box(point(0,0), point(0.5,0.5))),
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(box(point(0.5,0.5), point(0.75,0.75))),
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(box(point(0.8,0.8), point(1.0,1.0)))) as v(bb)
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cross join lateral
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(select p from gist_tbl where p <@ bb order by p <-> bb[0] limit 2) ss;
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drop index gist_tbl_point_index;
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-- Test index-only scan with box opclass
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create index gist_tbl_box_index on gist_tbl using gist (b);
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-- check that the planner chooses an index-only scan
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explain (costs off)
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select b from gist_tbl where b <@ box(point(5,5), point(6,6));
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-- execute the same
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select b from gist_tbl where b <@ box(point(5,5), point(6,6));
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-- Also test an index-only knn-search
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explain (costs off)
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select b from gist_tbl where b <@ box(point(5,5), point(6,6))
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order by b <-> point(5.2, 5.91);
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select b from gist_tbl where b <@ box(point(5,5), point(6,6))
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order by b <-> point(5.2, 5.91);
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-- Check commuted case as well
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explain (costs off)
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select b from gist_tbl where b <@ box(point(5,5), point(6,6))
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order by point(5.2, 5.91) <-> b;
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select b from gist_tbl where b <@ box(point(5,5), point(6,6))
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order by point(5.2, 5.91) <-> b;
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drop index gist_tbl_box_index;
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-- Test that an index-only scan is not chosen, when the query involves the
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-- circle column (the circle opclass does not support index-only scans).
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create index gist_tbl_multi_index on gist_tbl using gist (p, c);
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explain (costs off)
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select p, c from gist_tbl
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where p <@ box(point(5,5), point(6, 6));
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-- execute the same
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select b, p from gist_tbl
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where b <@ box(point(4.5, 4.5), point(5.5, 5.5))
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and p <@ box(point(5,5), point(6, 6));
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drop index gist_tbl_multi_index;
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-- Clean up
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reset enable_seqscan;
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reset enable_bitmapscan;
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reset enable_indexonlyscan;
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drop table gist_tbl;
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