Commit 84073bc

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Rinat Mukhtarov

committed

fibonacci_bytea fix table

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experiments
- delta_encode.md

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`‎experiments/delta_encode.md‎`

Lines changed: 7 additions & 7 deletions

Original file line number	Diff line number	Diff line change
`@@ -47,7 +47,7 @@ with t (t) as (`
`47`	`47`	`)`
`48`	`48`	`select * from b;`
`49`	`49`
`50`		`-select 'fib_bytea' as storage_type,`
	`50`	`+select 'fibonacci_bytea' as storage_type,`
`51`	`51`	`pg_column_size(a_fib) as orig_compressed_size,`
`52`	`52`	`pg_column_size(ad_fib) as delta_compressed_size,`
`53`	`53`	`pg_column_size(a_fib::text::bytea) as orig_uncompressed_size,`
`@@ -76,12 +76,12 @@ select 'jsonb_int_array',`
`76`	`76`	`from test.delta;`
`77`	`77`	```
`78`	`78`
`79`		`-\| storage\_type \| orig\_compressed\_size \| delta\_compressed\_size \| orig\_uncompressed\_size \| delta\_uncompressed\_size \|`
`80`		`-\|:---\| :---\| :---\| :---\| :---\|`
`81`		`-\| fib\_int\_array \|887 \| 773 \| 887 \| 773 \|`
`82`		`-\| pg\_int\_array \|1392 \| 1392 \| 1396 \| 1396 \|`
`83`		`-\| json\_int\_array \|2376 \| 1578 \| 2679 \| 1717 \|`
`84`		`-\| jsonb\_int\_array \| 2130 \| 2044 \| 5490 \| 4496 \|`
	`79`	`+\| storage\_type \| orig\_compressed\_size \| delta\_compressed\_size \| orig\_uncompressed\_size \| delta\_uncompressed\_size \|`
	`80`	`+\|:------------------\|-----------------------:\|------------------------:\|-------------------------:\|--------------------------:\|`
	`81`	`+\| fibonacci\_bytea \|887 \| 773 \| 887 \| 773 \|`
	`82`	`+\| pg\_int\_array \|1392 \| 1392 \| 1396 \| 1396 \|`
	`83`	`+\| json\_int\_array \|2376 \| 1578 \| 2679 \| 1717 \|`
	`84`	`+\| jsonb\_int\_array \| 2130 \| 2044 \| 5490 \| 4496 \|`
`85`	`85`
`86`	`86`	`Отсортированный список чисел (например список идентификаторов) с дельта + Фибоначчи кодированием`
`87`	`87`	и хранением в `bytea` занимает почти 2 раза меньше места, чем в обычном массиве `int[]`.

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`‎experiments/delta_encode.md‎`

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