pg_partition_indexes_size(oid|text, oidtext) bigint 指定名称的分区的索引使用的磁盘空间。其中,第一个参数为表名|oid,第二个参数为分区名|oid。 常见例子 查询所有数据库大小 select pg_database.datname, pg_size_pretty(pg_database_size(datname)) as size from pg_database; 查询所有表大小 se...
pg_size_pretty --- 8192 bytes (1 row) postgres=# select pg_size_pretty(pg_total_relation_size('t')); pg_size_pretty --- 8192 bytes (1 row) 5. 索引大小(pg_indexes_size) postgres=# select pg_size_pretty(pg_indexes_size('t')); pg_size_pretty --- 0 bytes (1 row) 6. 当前...
pg_size_pretty(table_size) AS table_size, pg_size_pretty(indexes_size) AS indexes_size, pg_size_pretty(total_size) AS total_size FROM ( SELECT table_name, pg_table_size(table_name) AS table_size, pg_indexes_size(table_name) AS indexes_size, pg_total_relation_size(table_name) AS t...
(1ROW) 由此可见,pg_table_size是pg_relation_size所有返回值的总和。 而pg_total_relation_size是pg_table_size和pg_indexes_size的总和。 如果您想知道表正在使用多少空间,请使用pg_table_size和pg_total_relation_size考虑它们-一个数字是仅表的,一个数字是表+索引的。 检查存储文件的布局,以获取有关fsm,v...
数据库:select pg_size_pretty(pg_database_size('postgis')); 表空间:select pg_size_pretty(pg_tablespace_size('pg_default')); 查看某个表的索引所占大小: select pg_indexes_size('tb_all_data_manual'); 查看某个索引的所占大小: select pg_relation_size('index_tb_all_data_manual_code_timety...
z1 = 'select pg_indexes_size(\'' z2 = '\');' #print(z1+table+z2) cur.execute(z1+table+z2) rows = cur.fetchall() size = 0 for row in rows: size = int(row[0]) + size print('表索引大小合计') print(str(size) + ' byte') ...
select pg_size_pretty(pg_relation_size('product')) as size; 4、查询数据库表包括索引的大小 select pg_size_pretty(pg_total_relation_size('table_name')) as size; 5、查看表中索引大小 select pg_size_pretty(pg_indexes_size('product')); ...
单一索引(Unique Indexes)。如果索引声明为唯一索引,那么就不允许出现多个索引值相同的元组。唯一索引可以迫使某个字段的值不重复(主键功能类似,但唯一索引允许NULL存在,NULL并不会被认为是相等的),也可以让联合字段组成的值唯一。在创建索引时添加UNIQUE关键字可以生成单一索引,目前只有B-tree索引支持单一索引的用法。
CREATE INDEX idx_real ON my_complex (((value).r)); \d my_complex; Table "public.my_complex" Column | Type | Collation | Nullable | Default ---+---+---+---+--- name | text | | | value | complex | | | Indexes: "idx_real" btree (((value).r)) CREATE INDEX idx_complex...
from pg_stat_user_indexes where indexrelnamein(select indexname from pg_indexes where schemaname='public'and tablename='testdata');schemaname|relname|indexrelname|index_size|idx_scan|idx_tup_read|idx_tup_fetch---+---+---+---+---+---+---public|testdata|testdata_pkey|16384|2|5999998...