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ca2e4472ba
There was talk about adding units all the way up to yottabytes but it seems quite far-fetched that anyone would need those. Since such large units are not exactly commonplace, it seems unlikely that having pg_size_pretty outputting unit any larger than petabytes would actually be helpful to anyone. Since petabytes are on the horizon, let's just add those only. Maybe one day we'll get to add additional units, but it will likely be a while before we'll need to think beyond petabytes in regards to the size of a database. Author: David Christensen Discussion: https://postgr.es/m/CAOxo6XKmHc_WZip-x5QwaOqFEiCq_SVD0B7sbTZQk+qqcn2qaw@mail.gmail.com
69 lines
2.9 KiB
SQL
69 lines
2.9 KiB
SQL
SELECT size, pg_size_pretty(size), pg_size_pretty(-1 * size) FROM
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(VALUES (10::bigint), (1000::bigint), (1000000::bigint),
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(1000000000::bigint), (1000000000000::bigint),
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(1000000000000000::bigint)) x(size);
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SELECT size, pg_size_pretty(size), pg_size_pretty(-1 * size) FROM
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(VALUES (10::numeric), (1000::numeric), (1000000::numeric),
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(1000000000::numeric), (1000000000000::numeric),
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(1000000000000000::numeric),
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(10.5::numeric), (1000.5::numeric), (1000000.5::numeric),
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(1000000000.5::numeric), (1000000000000.5::numeric),
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(1000000000000000.5::numeric)) x(size);
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-- test where units change up
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SELECT size, pg_size_pretty(size), pg_size_pretty(-1 * size) FROM
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(VALUES (10239::bigint), (10240::bigint),
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(10485247::bigint), (10485248::bigint),
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(10736893951::bigint), (10736893952::bigint),
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(10994579406847::bigint), (10994579406848::bigint),
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(11258449312612351::bigint), (11258449312612352::bigint)) x(size);
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SELECT size, pg_size_pretty(size), pg_size_pretty(-1 * size) FROM
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(VALUES (10239::numeric), (10240::numeric),
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(10485247::numeric), (10485248::numeric),
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(10736893951::numeric), (10736893952::numeric),
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(10994579406847::numeric), (10994579406848::numeric),
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(11258449312612351::numeric), (11258449312612352::numeric),
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(11528652096115048447::numeric), (11528652096115048448::numeric)) x(size);
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-- pg_size_bytes() tests
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SELECT size, pg_size_bytes(size) FROM
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(VALUES ('1'), ('123bytes'), ('1kB'), ('1MB'), (' 1 GB'), ('1.5 GB '),
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('1TB'), ('3000 TB'), ('1e6 MB'), ('99 PB')) x(size);
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-- case-insensitive units are supported
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SELECT size, pg_size_bytes(size) FROM
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(VALUES ('1'), ('123bYteS'), ('1kb'), ('1mb'), (' 1 Gb'), ('1.5 gB '),
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('1tb'), ('3000 tb'), ('1e6 mb'), ('99 pb')) x(size);
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-- negative numbers are supported
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SELECT size, pg_size_bytes(size) FROM
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(VALUES ('-1'), ('-123bytes'), ('-1kb'), ('-1mb'), (' -1 Gb'), ('-1.5 gB '),
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('-1tb'), ('-3000 TB'), ('-10e-1 MB'), ('-99 PB')) x(size);
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-- different cases with allowed points
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SELECT size, pg_size_bytes(size) FROM
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(VALUES ('-1.'), ('-1.kb'), ('-1. kb'), ('-0. gb'),
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('-.1'), ('-.1kb'), ('-.1 kb'), ('-.0 gb')) x(size);
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-- invalid inputs
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SELECT pg_size_bytes('1 AB');
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SELECT pg_size_bytes('1 AB A');
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SELECT pg_size_bytes('1 AB A ');
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SELECT pg_size_bytes('9223372036854775807.9');
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SELECT pg_size_bytes('1e100');
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SELECT pg_size_bytes('1e1000000000000000000');
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SELECT pg_size_bytes('1 byte'); -- the singular "byte" is not supported
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SELECT pg_size_bytes('');
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SELECT pg_size_bytes('kb');
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SELECT pg_size_bytes('..');
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SELECT pg_size_bytes('-.');
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SELECT pg_size_bytes('-.kb');
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SELECT pg_size_bytes('-. kb');
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SELECT pg_size_bytes('.+912');
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SELECT pg_size_bytes('+912+ kB');
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SELECT pg_size_bytes('++123 kB');
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