2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed 从执行计划上可以看出,该查询使用到了索引I_T。 5.再次查看v$object_usage视图中记录的信息 sec@ora10g> set autot off sec@ora10g> select * from v$object_usage; INDEX_NAME TABLE_NAME MONITORIN USED START_...
SQL>select'alter index'||owner||'.'||index_name||'monitoring usage;'as"Monitor Indices Script"fromdba_indexeswhereownerin('SECOOLER'); Monitor Indices Script---alterindexSECOOLER.I_T monitoring usage; …… 省略 …… 如果您对PL/SQL熟悉的话,可以更方便的完成批量将索引置为被监控状态。 SQL>co...
。 要增加一个列、修改一列的类型或者使用OF子句,你还必须具有该数据类型上的USAGE特权。 参数 IF EXISTS如果表不存在则不要抛出一个错误。这种情况下会发出一个提示。 name要修改的一个现有表的名称(可以是模式限定的)。如果在表名前指定了 ONLY,则只会修改该表。如果没有指定ONLY, 该表及其所有后代表(如果...
SQL creates a temporary source file that will contain C source code with embedded SQL statements. A program object is then created using the CRTPGM command. The SQL options used to create the program are the options that are in effect at the time the ALTER PROCEDURE (SQL) statement is exec...
GRANT usage, create ON SCHEMA test1 TO test2; 将test1用户下的表的查询权限赋予test2用户。 ALTER DEFAULT PRIVILEGES FOR USER test1 IN SCHEMA test1 GRANT SELECT ON tables TO test2; test1用户创建表。 SET ROLE test1 password '{password}'; CREATE TABLE test3(...
Cardinality estimation uses only one default set of model assumptions about the underlying data distribution and usage patterns for all databases and queries. The only way to change or adjust any one of those assumptions is when the user undertakes a manual process to expl...
The privilege set must implicitly or explicitly include the USAGE privilege on the distinct type. The encoding scheme of the distinct type must be the same as the encoding scheme of the table. If the column is to be used in the definition of the foreign key of a referential constraint, ...
This will turn off the OOB usage until you can resolve the underlying network inability to handle...
| ALL { FUNCTIONS | PROCEDURES | ROUTINES } IN SCHEMA schema_name [, ...] } TO role_specification [, ...] [ WITH GRANT OPTION ] [ GRANTED BY role_specification ] GRANT { USAGE | ALL [ PRIVILEGES ] } ON LANGUAGE lang_name [, ...] ...
The overall log space usage for resumable index is less compared to regular online index rebuild and allows log truncation during this operation. DDL statements attempting to modify an index that is being rebuild or its associated table while the index operation is paused aren't allowed. Ghost ...