REFRESH MATERIALIZED VIEW order_summary; 这个命令将释放与物化视图annual_statistics_basis相关 的存储并且让它变成一种不可扫描的状态: REFRESH MATERIALIZED VIEW annual_statistics_basis WITH NO DATA; 兼容性 REFRESH MATERIALIZED VIEW是一种 PostgreSQL扩展。
REFRESH MATERIALIZED VIEW name [ WITH [ NO ] DATA ] 描述 REFRESH MATERIALIZED VIEW完全替换一个物化视图的内容。旧的内容被丢弃。如果声明了WITH DATA(或缺省),后端查询被执行以提供新的数据,物化视图留在可扫描的状态。如果声明了WITH NO DATA,那么不会产生新的数据,并且物化视图留在一个不可扫描的状态。
REFRESH MATERIALIZED VIEW [ CONCURRENTLY ] name [ WITH [ NO ] DATA ] 参数 CONCURRENTLY对物化视图的刷新不阻塞在该物化视图上的并发选择。如果没有这个选项, 一次影响很多行的刷新将使用更少的资源并且更快结束,但是可能会阻塞其他尝试从物化视图中读取的连接。这个选项在只有少量行被影响的情况下可能会更快。
REFRESH MATERIALIZED VIEW completely replaces the contents of a materialized view. To execute this command you must be the owner of the materialized view. The old contents are discarded. If WITH DATA is specified (or defaults) the backing query is executed to provide the new data, and the ma...
Materialized view enables precomputing data for faster queries, with options for distribution, sorting, and automatic refresh from base tables. Supports incremental refresh for improved performance. May 15, 2025 Redshift › dg Refreshing a materialized view ...
REFRESH MATERIALIZED VIEW [CONCURRENTLY] view_name [WITH [NO] DATA] Parameters ParameterDescription CONCURRENTLY(Default behavior) This keyword is a no-op, added for PostgreSQL compatibility. All materialized views are refreshed concurrently with other jobs. ...
A small amount of data is computed with low complexity. A minute-level latency is allowed. Advantages: Materialized view queries support all SQL statements. Limits: Complete data can be updated only in batches. Fast refresh Real-time analysis scenarios: ...
DROP MATERIALIZED VIEW 功能描述 删除数据库中已有的物化视图。 注意事项 物化视图的所有者、物化视图所在模式的所有者、被授予了物化视图DROP权限的用户或拥有DROP ANY TABLE权限的用户才有权限执行DROP MATERIALIZED VIEW命令,系统管理员默认拥有此权限。 来自:帮助中心 查看更多 → DROP MATERIALIZED VIEW DROP ...
-- Refreshes the materialized view to reflect the latest available data> REFRESH MATERIALIZED VIEW catalog.schema.view_name;-- Refreshes the streaming table to process the latest available data-- The current catalog and schema will be used to qualify the table> REFRESH STREAMING TABLE st_name;-...
Materialized views - 物化视图 - 简称 MV,是已经被存储的或者说被物化-'materialized' 成 schema对象的查询结果。其中查询的 'From' 子句可以给 table, view 和 materialized view命名。这些用来建立 MV的对象都可以被称为 主表-master tables (a replication term) 或者 具体表-detail tables (a data warehousin...