To create a function-based index, in addition to the prerequisites for creating a conventional index, if the index is based on user-defined functions, then those functions must be markedDETERMINISTIC. Also, you must have theEXECUTEobject privilege on any user-defined function(s) used in the fu...
And the database can still use it. This is because it can filter the rows in the index. This is often faster than full scanning the table.*Starting in 11.2.0.2, Oracle Database can use function-based indexes to process queries without the function in the where clause. This happens in ...
And the database can still use it. This is because it can filter the rows in the index. This is often faster than full scanning the table.*Starting in 11.2.0.2, Oracle Database can use function-based indexes to process queries without the function in the where clause. This happens in ...
To create a function-based index, in addition to the prerequisites for creating a conventional index, if the index is based on user-defined functions, then those functions must be marked DETERMINISTIC. A function-based index is executed with the credentials of the index owner, so the index own...
ERROR OGG-01169 Oracle GoldenGate Delivery for Oracle, <replicat>.prm: Encountered an update where all key columns for target table <USER>.<TABLE> are not present.2) No index defined that can be used.Example:Available Index is a Unique function-based index:...
在OceanBase 数据库 Oracle 模式下,如果删除表中的任一索引列,则所创建的索引失效。 语法 CREATE[UNIQUE]INDEXindex_name ONtable_name(key_part,...)[index_type][index_options]index_type:USINGBTREEindex_options:index_option[index_option...]index_option:GLOBAL|LOCAL|COMMENT'string'|...
(a * b));-- Create a table with a string column with a case-insensitive collation.>CREATETABLEnames(nameSTRINGCOLLATEUNICODE_CI);-- Create an external table connected to Oracle>CREATETABLEIFNOTEXISTSora_tabUSINGORACLEOPTIONS (url'<jdbc-url>', dbtable'',user'<username>',password'<pa...
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创建一个新的存储过程。函数创建也适用于存储过程,更多内容请参考CREATE FUNCTION。如果创建存储过程时参数或返回值带有精度,不进行精度检测。创建存储过程时,存储过程定义中对表对象的操作建议都显示指定模式,否则可能会导致存储过程执行异常。在创建存储过程时,存储
在本篇文章中,我们将一步一步地回答你在中括号内提到的问题,并详细讲解如何使用"CREATE OR REPLACE FUNCTION"语句进行函数的创建或替换。 首先,让我们介绍一下函数在Oracle中的概念。一个函数是一个可执行的PL/SQL代码块,它接收输入参数并返回一个值。函数可以在SQL查询中使用,也可以作为其他函数或存储过程的一...