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Discussão:Código Natural/Representação interna (ver código-fonte)
Edição das 13h56min de 9 de agosto de 2023
, 9 de agosto de 2023→Geração dos exemplos
(Criou página com ' == Geração dos exemplos == <syntaxhighlight lang="sql"> select len, count(*) n from (select len, bitstring, hbig as hbig_dec, '0 '||((hbig-len)>>4)::bit(11)::text ||' ' ||len::bit(4)::text internal_16bits, hbig>>4 as value_dec, len as len_dec from (SELECT row_number() over() AS count, bitstring, -- x as hbig, natcod.vBit_to_hSml( bitstring ) as hbig, length(bitstring) as len, natcod.vbit_to_hiddenBig( bitstring ) as hidd, natcod.vbit_to_b...') |
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| Linha 3: | Linha 3: | ||
<syntaxhighlight lang="sql"> | <syntaxhighlight lang="sql"> | ||
create view wiki_print1 AS | |||
SELECT len, | |||
bitstring, | |||
hbig as hbig_dec, | |||
'0 '||((hbig-len)>>4)::bit(11)::text ||' ' ||len::bit(4)::text internal_16bits, | |||
hbig>>4 as value_dec, | |||
len as len_dec | |||
FROM ( | |||
SELECT row_number() over() AS count, bitstring, | |||
-- x as hbig, | -- x as hbig, | ||
natcod.vBit_to_hSml( bitstring ) as hbig, length(bitstring) as len, | natcod.vBit_to_hSml( bitstring ) as hbig, length(bitstring) as len, | ||
| Linha 9: | Linha 17: | ||
natcod.vbit_to_baseh(bitstring,4,true) as b4h, | natcod.vbit_to_baseh(bitstring,4,true) as b4h, | ||
natcod.vbit_to_baseh(bitstring,16,true) as b16h | natcod.vbit_to_baseh(bitstring,16,true) as b16h | ||
FROM ( | FROM ( | ||
SELECT bitstring, natcod.vbit_to_hbig(bitstring) x | |||
FROM natcod.generate_vbit_series(11) t(bitstring) | |||
) t2 | ) t1 | ||
) t2; | |||
</syntaxhighlight> | </syntaxhighlight> | ||
<pre> | |||
len | bitstring | hbig_dec | internal_16bits | value_dec | len_dec | |||
-----+-------------+----------+--------------------+-----------+--------- | |||
1 | 0 | 1 | 0 00000000000 0001 | 0 | 1 | |||
2 | 00 | 2 | 0 00000000000 0010 | 0 | 2 | |||
3 | 000 | 3 | 0 00000000000 0011 | 0 | 3 | |||
4 | 0000 | 4 | 0 00000000000 0100 | 0 | 4 | |||
5 | 00000 | 5 | 0 00000000000 0101 | 0 | 5 | |||
6 | 000000 | 6 | 0 00000000000 0110 | 0 | 6 | |||
7 | 0000000 | 7 | 0 00000000000 0111 | 0 | 7 | |||
8 | 00000000 | 8 | 0 00000000000 1000 | 0 | 8 | |||
9 | 000000000 | 9 | 0 00000000000 1001 | 0 | 9 | |||
10 | 0000000000 | 10 | 0 00000000000 1010 | 0 | 10 | |||
11 | 00000000000 | 11 | 0 00000000000 1011 | 0 | 11 | |||
11 | 00000000001 | 27 | 0 00000000001 1011 | 1 | 11 | |||
10 | 0000000001 | 42 | 0 00000000010 1010 | 2 | 10 | |||
... | |||
</pre> | |||
=== Exemplo de comprimento 11 === | === Exemplo de comprimento 11 === | ||
Distribuição dos comprimentos: | Distribuição dos comprimentos: | ||
<pre> | <pre> | ||
select len, count(*) n from wiki_print1 group by 1 order by 2 desc, 1; | |||
len | n | len | n | ||
-----+------ | -----+------ | ||
| Linha 36: | Linha 63: | ||
Distribuição dos valores sem diferenciador cache-length: | Distribuição dos valores sem diferenciador cache-length: | ||
<pre> | <pre> | ||
select value_dec, count(*) n from wiki_print1 group by 1 order by 2 desc, 1; | |||
value_dec | n | value_dec | n | ||
-----------+---- | -----------+---- | ||