WITH tbl_ids AS (SELECT DISTINCT oid FROM pg_class c WHERE relowner>1 AND relkind='r'), stp AS (SELECT id,sum(ROWS)sum_r,sum(sorted_rows)sum_sr,min(ROWS)min_r, max(ROWS)max_r,nvl(count(DISTINCT slice),0)pop_slices FROM stv_tbl_perm WHERE id IN (SELECT oid FROM tbl_ids)...
要查看应用于表的分配方式,请查询 PG_CLASS_INFO 系统目录视图。有关更多信息,请参阅查看分配方式。如果未使用 CREATE TABLE 语句指定分配方式,Amazon Redshift 将应用自动 (AUTO) 分配。 EVEN 分配 不管任意特定列中的值是什么,领导节点都以轮询方式向所有切片分配行。当表不参与联接时,适合使用 EVEN 分配。当 ...
INNER JOIN pg_class AS c ON c.relnamespace= con.connamespace AND c.oid =con.conrelid INNER JOIN pg_namespace AS n ON n.oid=c.relnamespace WHERE c.relkind='r'AND pg_get_constraintdef(con.oid) NOT LIKE'FOREIGN KEY%'ORDER BY seq)--CLOSE PAREN COLUMN LIST UNION SELECT c.oid::b...
PG_CLASS_INFO is an Amazon Redshift system view built on the PostgreSQL catalog tables PG_CLASS and PG_CLASS_EXTENDED. PG_CLASS_INFO includes details about table creation time and the current distribution style. For more information, see .
)asajoinpg_classaspgconpgc.oid=a.idleftjoinpg_user use2on(pgc.relowner=use2.usesysid)joinpg_namespaceaspgnonpgn.oid=pgc.relnamespaceandpgn.nspowner>1joinpg_databaseaspgdbonpgdb.oid=a.db_idjoin(selecttbl,count(*)asmbytesfromstv_blocklistgroupbytbl ...
1,使用COPY命令将多个、大小相当的文件加载到Redshift Amazon Redshift是一个MPP数据库,即大规模并行处理数据库,Redshift的背后是一个EC2集群,每个计算节点(ec2)进一步细分为slice,所有slice平分计算节点的处理能力。 每个节点的slice数量取决于群集的节点类型。 例如,每个DS2.XLARGE计算节点都有两个slice,而每个DS2.8...
on d_p.objid=d_c.objidjoinpg_catalog.pg_class c_c on d_c.refobjid=c_c.relfilenode left outerjoinpg_namespace n_p on c_p.relnamespace=n_p.oid left outerjoinpg_namespace n_c on c_c.relnamespace=n_c.oid where d_c.deptype='i'::"char"and c_c.relkind='v'::"char"; ...
创建一个视图find_depend: create view find_dependasselectdistinctc_p.oidastbloid, n_p.nspnameasschemaname, c_p.relnameasname, n_c.nspnameasrefbyschemaname, c_c.relnameasrefbyname, c_c.oidasviewoidfrompg_catalog.pg_class c_pjoinpg_catalog.pg_depend d_ponc_p.relfilenode = d_p.refob...
Redshift不强制主键约束,但它们在其他方面也可供使用。它们在自动执行数据管道或数据质量检查时非常有用...
您说卸载工作正常,但您收到此错误,这表明您正在成功连接,但当查询完成时,您的代码与JDBC驱动程序的...