then OracleDatabase deallocates an existing cursor. Although deallocating a cursor couldresult in a library cache miss later (only if the cursor is reexecuted), it ispreferable to an error halting your application because a SQL statement cannotbe parsed. ...
When Oracle Database executes a SQL statement, it stores the result set and processing information in an unnamedprivate SQL area. A pointer to this unnamed area, called acursor, lets youretrieve the rows of the result set one at a time.Cursor attributesreturn information about the state of t...
(1)If CURSOR_SPACE_FOR_TIMEis set to false (the default), then a cursor can be deallocated from the library cache regardless ofwhether application cursors associated with its SQL statement are open.In this case, Oracle Database must verify that the cursor containing the SQLstatement is in th...
E PL/SQL Predefined Data Types Index An implicit cursor has attributes that return information about the most recently runSELECTor DML statement that is not associated with a named cursor. Note: You can use cursor attributes only in procedural statements, not in SQL statements. ...
Oracle Cursor的使用 When Oracle Database executes a SQL statement, it stores the result set and processing information in an unnamedprivate SQL area. A pointer to this unnamed area, called acursor, lets youretrieve the rows of the result set one at a time.Cursor attributes return information ...
Oracle里的cursor分为两种:一种是shared cursor,一种是session cursor。 1.1 Shared cursor 说明 sharedcursor就是指缓存在librarycache(SGA下的Shared Pool)里的一种library cache object,说白了就是指缓存在library cache里的sql和匿名pl/sql。 它们是Oracle缓存在librarycache中的几十种librarycache object之一,它所...
oracleplsqlcursor使用When Oracle Database executes a SQL statement, it stores the result set and processing information in an unnamedprivate SQL area. A pointer to this unnamed area, called acursor, lets youretrieve the rows of the result set one at a time.Cursor attributes return information ...
カーソル属性Cursor attributes,PolarDB:各カーソルには、% ISOPEN、% FOUND、% NOTFOUND、および % ROWCOUNTの4つの属性があります。 これらの属性は、カーソルの状態をテストするために使用されます。 このトピックでは、これらの属性とその例について説明します。
内容提示: When Oracle Database executes a SQL statement, it stores the result set and processing information in an unnamedprivate SQL area. A pointer to this unnamed area, called acursor, lets youretrieve the rows of the result set one at a time.Cursor attributes return information about the...
ColumnOrdinal" value="implicitRefCursor metadata=AttributesList" /> add要素は、REF CURSORの各列に対して定義する必要があります。たとえば、5つの列を返すREF CURSORでは、構成ファイルで5つのadd要素を定義する必要があります。 各add要素には、name属性およびvalue属性が含まれます。value属性は、...