in the database, it is found that the difference between the Corrupt view and the normal view is that the from statement of the Corrupt view has a table_schema prefix definition, while the normal view does not have a table_schema prefix -- Corrupt view definition root@localhost[demo]> ...
视图在数据库中有着重要的作用，视图经常被用来当做一个抽象的装置，特别是对某些应用来讲，它可能不...
TheVIEW_ROUTINE_USAGEtable (available as of MySQL 8.0.13) provides access to information about stored functions used in view definitions. The table does not list information about built-in (native) functions or loadable functions used in the definitions. You can see information only for views ...
TheVIEW_TABLE_USAGEtable provides access to information about tables and views used in view definitions. You can see information only for views for which you have some privilege, and only for tables for which you have some privilege. The
and receive a full description of the definition. * Most importantly this shortcoming becomes problematic when a super user like root tries to perform an export using mysql-dump. This client evidently uses SHOW CREATE VIEW in order to read out the contents of views, and if the view is SQL ...
Source query (same as view definition) time is ~0.100 (SQL_NO_CACHE) Query from view (select * from some_view) time is ~0.300 (SQL_NO_CACHE) Server is configured with lot of available memory, query cache is enabled and works fine, and there is not this problem in production.. Bu...
public ReportConfigDataset dataSet() Get the dataSet property: Has definition for data in this report config. Returns: the dataSet value.dateRange public String dateRange() Get the dateRange property: Date range of the current view. Returns: the dateRange value.display...
public ReportConfigDataset dataSet() Get the dataSet property: Has definition for data in this report config. Returns: the dataSet value.dateRange public String dateRange() Get the dateRange property: Date range of the current view. Returns: the dateRange value.display...
The ALGORITHM clause for CREATE VIEW does not affect materialization for any WITH clause preceding the SELECT statement in the view definition. Consider this statement: CREATEALGORITHM={TEMPTABLE|MERGE}VIEWv1ASWITH...SELECT... The ALGORITHM value affects materialization only of the SELECT, not the ...
But I couldn't understand. A materialized view takes a different approach in which the query result is cached as a concrete table that may be updated from the original base tables from time to time. Can someone explain to me the definition and usage about the materialized view. ...