mirror of
https://github.com/pgvector/pgvector.git
synced 2026-06-06 05:51:21 +08:00
55 lines
1.5 KiB
Perl
55 lines
1.5 KiB
Perl
use strict;
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use warnings FATAL => 'all';
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use PostgreSQL::Test::Cluster;
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use PostgreSQL::Test::Utils;
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use Test::More;
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my $dim = 3;
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my $array_sql = join(",", ('random()') x $dim);
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# Initialize node
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my $node = PostgreSQL::Test::Cluster->new('node');
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$node->init;
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$node->start;
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# Create table
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$node->safe_psql("postgres", "CREATE EXTENSION vector;");
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$node->safe_psql("postgres", "CREATE TABLE tst (i int4 PRIMARY KEY, v vector($dim));");
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$node->safe_psql("postgres",
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"INSERT INTO tst SELECT i, ARRAY[$array_sql] FROM generate_series(1, 100000) i;"
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);
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$node->safe_psql("postgres", "CREATE INDEX ON tst USING ivfflat (v vector_l2_ops);");
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my $count = $node->safe_psql("postgres", qq(
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SET enable_seqscan = off;
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SET ivfflat.probes = 10;
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SET ivfflat.iterative_scan = relaxed_order;
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SELECT COUNT(*) FROM (SELECT v FROM tst WHERE i % 10000 = 0 ORDER BY v <-> (SELECT v FROM tst LIMIT 1) LIMIT 11) t;
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));
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is($count, 10);
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foreach ((30, 50, 70))
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{
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my $max_probes = $_;
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my $expected = $max_probes / 10;
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my $sum = 0;
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for my $i (1 .. 20)
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{
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$count = $node->safe_psql("postgres", qq(
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SET enable_seqscan = off;
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SET ivfflat.probes = 10;
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SET ivfflat.iterative_scan = relaxed_order;
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SET ivfflat.max_probes = $max_probes;
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SELECT COUNT(*) FROM (SELECT v FROM tst WHERE i % 10000 = 0 ORDER BY v <-> (SELECT v FROM tst WHERE i = $i) LIMIT 11) t;
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));
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$sum += $count;
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}
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my $avg = $sum / 20;
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cmp_ok($avg, '>', $expected - 2);
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cmp_ok($avg, '<', $expected + 2);
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}
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done_testing();
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