postgres=# select oid from pg_class where relname=:'tablename'; oid --- 24678 (1 row) 以下是我失败的几个尝试: postgres=# select oid into partition_table_id from pg_class where relname=:'tablename'; ERROR: There is no hash distributable column postgres=# select oid from pg_class where...
postgres=# select oid from pg_class where relname=:'tablename'; oid --- 24678 (1 row) 以下是我失败的几个尝试: postgres=# select oid into partition_table_id from pg_class where relname=:'tablename'; ERROR: There is no hash distributable column postgres=# select oid from pg_class where...
select*frompg_locks aawhereaa.relationin(selectoidfrompg_classwhererelname='sbtest1'); image.png 查看对应的SQL,发现为 大表之间的left join, 无where条件 (左表600w行, 13GB, 右表1000w行, dn,cn 内存均2GB...) 代码语言:sql AI代码解释 select*frompg_stat_activitywherepidin(selectpidfrompg_lo...
All these privileges are stored in single column in pg_class table: $selectoid::regclass,relaclfrompg_classwhererelname='whatever'; oid │ relacl ──────────┼──────────────────────────────────────────────────────...
在PostgreSQL中,删除非空约束需要先删除约束,然后再创建一个新的表。以下是详细步骤: 首先,找到要删除的非空约束的名称。可以使用以下查询: 代码语言:sql 复制 SELECTconname,relname,nspnameFROMpg_constraint cJOINpg_class tONt.oid=c.conrelidJOINpg_namespace nONn.oid=t.relnamespaceWHEREcontype='c'AND...
from pg_class c,pg_attribute a where c.relname='表名' and c.oid=a.attrelid and a.attnum>0 四、Mysql版本 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 DROP FUNCTION IF EXISTS f_selectall; DELIMITER $ CREATE FUNCTION f_selectall(ptablename VARCHAR(50),...
db_tapp=# SELECT * , pg_relation_filepath(oid) FROM pg_class where pg_relation_filepath(oid) like '%8843923%'; oid | relname | relnamespace | reltype | reloftype | relowner | relam | relfilenode | reltablespace | relpages | reltuples | relallvisible | reltoastrelid | relhas...
select relname as TABLE_NAME ,col_description(c.oid, 0) as COMMENTS from pg_class c where relkind = 'r' and relname not like 'pg_%' and relname not like 'sql_%' 四、获取数据大小 1、查询执行数据库大小 select pg_size_pretty (pg_database_size('db_product')); ...
sql:select cast(relname as varchar) as Name, cast(obj_description(c.oid,'pg_class') as varchar) as Description from pg_class c inner join pg_namespace n on n.oid = c.relnamespace and nspname='public' inner join pg_tables z on z.tablename=c.relname where relkind in('p', ...
.join(PG_CLASS) .and(canUseTupleInPredicates() PG_NAMESPACE.NSPNAME, PG_CLASS.RELNAME) .from(PG_CLASS) .join(PG_NAMESPACE) .unionAll( .from(PG_CLASS) .join(PG_NAMESPACE) .on(PG_CLASS.RELNAMESPACE.eq(oid(PG_NAMESPACE))) .leftOuterJoin(PG_DESCRIPTION) .from(ROUTINES) .from(ct) ...