Postgresql 在Postgres 13中，tsrange字段需要多少字节？（俄罗斯方块专栏）
当我在一张大桌子上玩俄罗斯方块列时，我试图找出tsrange字段的字节要求 我没有在手册中找到详细说明，所以我尝试了pg_类型： 根据这些结果：Postgresql 在Postgres 13中，tsrange字段需要多少字节？（俄罗斯方块专栏）,postgresql,range,Postgresql,Range,当我在一张大桌子上玩俄罗斯方块列时，我试图找出tsrange字段的字节要求 我没有在手册中找到详细说明，所以我尝试了pg_类型： 根据这些结果： typlen typalign typname 8 d timestamp -1 d tsrange 文档解释说，d的typealign表示许多机器上的双对齐8字节，但决不是全部。一个-1的typelen表示一个“varlena”类型，它有一个长单词 如果我读对了，那么tsrange是可
typlen typalign typname
8 d timestamp
-1 d tsrange
fixed length types, from largest to smallest: uuid-bigint-integer, etc.
variable length types, with tsrange first
fixed length types, from largest to smallest: uuid-bigint-integer, etc.
variable length types, with tsrange first
DROP TABLE IF EXISTS ascendco.edge CASCADE;
CREATE TABLE IF NOT EXISTS ascendco.edge (
id uuid NOT NULL DEFAULT NULL,
inv_id uuid NOT NULL DEFAULT NULL,
from_scan_at_facility_id uuid NOT NULL DEFAULT NULL,
from_associated_to_id uuid NOT NULL DEFAULT NULL,
to_associated_to_id uuid NOT NULL DEFAULT NULL,
from_web_user_id uuid NOT NULL DEFAULT NULL,
from_assembly_id uuid NOT NULL DEFAULT NULL,
from_scan_id uuid NOT NULL DEFAULT NULL,
from_sterilizer_load_id uuid NOT NULL DEFAULT NULL,
from_facility_location_id uuid NOT NULL DEFAULT NULL,
from_facility_id uuid NOT NULL DEFAULT NULL,
from_washer_load_id uuid NOT NULL DEFAULT NULL,
from_scase_id uuid NOT NULL DEFAULT NULL,
from_clinic_id uuid NOT NULL DEFAULT NULL,
from_facility_department_id uuid NOT NULL DEFAULT NULL,
hsys_id uuid NOT NULL DEFAULT NULL,
to_scan_id uuid NOT NULL DEFAULT NULL,
to_scan_at_facility_id uuid NOT NULL DEFAULT NULL,
to_web_user_id uuid NOT NULL DEFAULT NULL,
to_facility_location_id uuid NOT NULL DEFAULT NULL,
to_sterilizer_load_id uuid NOT NULL DEFAULT NULL,
to_washer_load_id uuid NOT NULL DEFAULT NULL,
to_facility_id uuid NOT NULL DEFAULT NULL,
to_scase_id uuid NOT NULL DEFAULT NULL,
to_clinic_id uuid NOT NULL DEFAULT NULL,
to_facility_department_id uuid NOT NULL DEFAULT NULL,
to_assembly_id uuid NOT NULL DEFAULT NULL,
num_inst integer NOT NULL DEFAULT 0,
seconds integer NOT NULL DEFAULT 0,
from_node_dts timestamp NOT NULL DEFAULT NULL,
to_node_dts timestamp NOT NULL DEFAULT NULL,
created_dts timestamp NOT NULL DEFAULT NULL,
updated_dts timestamp NOT NULL DEFAULT NULL,
from_to_range tsrange GENERATED ALWAYS AS (tsrange(from_node_dts, to_node_dts)) STORED,
sequence_ citext NOT NULL DEFAULT NULL,
from_node citext NOT NULL DEFAULT NULL,
to_node citext NOT NULL DEFAULT NULL,
from_to_node citext NOT NULL DEFAULT NULL,
from_associated_to citext NOT NULL DEFAULT NULL,
to_associated_to citext NOT NULL DEFAULT NULL,
from_user_name citext NOT NULL DEFAULT NULL,
source_ citext NOT NULL DEFAULT NULL,
is_fake citext NOT NULL DEFAULT NULL,
to_user_name citext NOT NULL DEFAULT NULL,
CONSTRAINT edge_id_pkey
PRIMARY KEY (id),
CONSTRAINT finishes_after_starts
CHECK (from_node_dts <= to_node_dts) -- Make sure that we don't end up with *any* records with a start time later than the end time. = is fine.
);
/*
Table_in is a 'regclass'. It's a way of avoiding SQL injection problems,
not that there is a chance of that here. (No dynamic SQL.) The really nice
part is that you can pass in table_name or schema_name.table_name this way
and either work magically.
*/
CREATE OR REPLACE FUNCTION dba.column_tetris (table_in regclass)
RETURNS table (
column_name text,
type_name text,
type_align text,
alignment_description text,
type_length int2,
suggestioned_position int8,
current_position int2
)
AS $BODY$
SELECT a.attname::text AS column_name,
t.typname::text AS type_name,
t.typalign::text AS type_align,
CASE
WHEN typalign = 'c' THEN 'char alignment, no alignment needed'
WHEN typalign = 's' THEN 'short alignment, 2 bytes on most machines'
WHEN typalign = 'i' THEN 'int alignment, 4 bytes on most machines'
WHEN typalign = 'd' THEN 'double alignment, 8 bytes on many machines, but by no means all'
ELSE 'Unexpected typalign ' || typalign
END AS alignment_description,
t.typlen AS type_length,
ROW_NUMBER () OVER (ORDER BY t.typlen DESC,a.attname) as suggested_position,
a.attnum AS currrent_position
FROM pg_class c
JOIN pg_attribute a ON (a.attrelid = c.oid)
JOIN pg_type t ON (t.oid = a.atttypid)
WHERE c.relname = table_in::name AND
a.attnum >= 0
ORDER BY t.typlen DESC,a.attname;
$BODY$
LANGUAGE sql;
COMMENT ON FUNCTION dba.column_tetris (regclass) IS '
/*
Adapted from this excellent blog post:
https://blog.2ndquadrant.com/on-rocks-and-sand/
*/';
+-----------------------------+-----------+------------+-----------------------------------------------------------------+-------------+-----------------------+------------------+
| column_name | type_name | type_align | alignment_description | type_length | suggestioned_position | current_position |
+-----------------------------+-----------+------------+-----------------------------------------------------------------+-------------+-----------------------+------------------+
| from_assembly_id | uuid | c | char alignment, no alignment needed | 16 | 1 | 7 |
| from_associated_to_id | uuid | c | char alignment, no alignment needed | 16 | 2 | 4 |
| from_clinic_id | uuid | c | char alignment, no alignment needed | 16 | 3 | 14 |
| from_facility_department_id | uuid | c | char alignment, no alignment needed | 16 | 4 | 15 |
| from_facility_id | uuid | c | char alignment, no alignment needed | 16 | 5 | 11 |
| from_facility_location_id | uuid | c | char alignment, no alignment needed | 16 | 6 | 10 |
| from_scan_at_facility_id | uuid | c | char alignment, no alignment needed | 16 | 7 | 3 |
| from_scan_id | uuid | c | char alignment, no alignment needed | 16 | 8 | 8 |
| from_scase_id | uuid | c | char alignment, no alignment needed | 16 | 9 | 13 |
| from_sterilizer_load_id | uuid | c | char alignment, no alignment needed | 16 | 10 | 9 |
| from_washer_load_id | uuid | c | char alignment, no alignment needed | 16 | 11 | 12 |
| from_web_user_id | uuid | c | char alignment, no alignment needed | 16 | 12 | 6 |
| hsys_id | uuid | c | char alignment, no alignment needed | 16 | 13 | 16 |
| id | uuid | c | char alignment, no alignment needed | 16 | 14 | 1 |
| inv_id | uuid | c | char alignment, no alignment needed | 16 | 15 | 2 |
| to_assembly_id | uuid | c | char alignment, no alignment needed | 16 | 16 | 27 |
| to_associated_to_id | uuid | c | char alignment, no alignment needed | 16 | 17 | 5 |
| to_clinic_id | uuid | c | char alignment, no alignment needed | 16 | 18 | 25 |
| to_facility_department_id | uuid | c | char alignment, no alignment needed | 16 | 19 | 26 |
| to_facility_id | uuid | c | char alignment, no alignment needed | 16 | 20 | 23 |
| to_facility_location_id | uuid | c | char alignment, no alignment needed | 16 | 21 | 20 |
| to_scan_at_facility_id | uuid | c | char alignment, no alignment needed | 16 | 22 | 18 |
| to_scan_id | uuid | c | char alignment, no alignment needed | 16 | 23 | 17 |
| to_scase_id | uuid | c | char alignment, no alignment needed | 16 | 24 | 24 |
| to_sterilizer_load_id | uuid | c | char alignment, no alignment needed | 16 | 25 | 21 |
| to_washer_load_id | uuid | c | char alignment, no alignment needed | 16 | 26 | 22 |
| to_web_user_id | uuid | c | char alignment, no alignment needed | 16 | 27 | 19 |
| created_dts | timestamp | d | double alignment, 8 bytes on many machines, but by no means all | 8 | 28 | 32 |
| from_node_dts | timestamp | d | double alignment, 8 bytes on many machines, but by no means all | 8 | 29 | 30 |
| to_node_dts | timestamp | d | double alignment, 8 bytes on many machines, but by no means all | 8 | 30 | 31 |
| updated_dts | timestamp | d | double alignment, 8 bytes on many machines, but by no means all | 8 | 31 | 33 |
| num_inst | int4 | i | int alignment, 4 bytes on most machines | 4 | 32 | 28 |
| seconds | int4 | i | int alignment, 4 bytes on most machines | 4 | 33 | 29 |
| from_associated_to | citext | i | int alignment, 4 bytes on most machines | -1 | 34 | 39 |
| from_node | citext | i | int alignment, 4 bytes on most machines | -1 | 35 | 36 |
| from_to_node | citext | i | int alignment, 4 bytes on most machines | -1 | 36 | 38 |
| from_to_range | tsrange | d | double alignment, 8 bytes on many machines, but by no means all | -1 | 37 | 34 |
| from_user_name | citext | i | int alignment, 4 bytes on most machines | -1 | 38 | 41 |
| is_fake | citext | i | int alignment, 4 bytes on most machines | -1 | 39 | 43 |
| sequence_ | citext | i | int alignment, 4 bytes on most machines | -1 | 40 | 35 |
| source_ | citext | i | int alignment, 4 bytes on most machines | -1 | 41 | 42 |
| to_associated_to | citext | i | int alignment, 4 bytes on most machines | -1 | 42 | 40 |
| to_node | citext | i | int alignment, 4 bytes on most machines | -1 | 43 | 37 |
| to_user_name | citext | i | int alignment, 4 bytes on most machines | -1 | 44 | 44 |
+-----------------------------+-----------+------------+-----------------------------------------------------------------+-------------+-----------------------+------------------+