Hints只应用在它们所在sql语句块(statement block,由select、update、delete关键字标识)上,对其它SQL语句或语句的其它部分没有影响。如:对于使用union操作的2个sql语句,如果只在一个sql语句上有Hints,则该Hints不会影响另一个sql语句。 我们可以使用注释(comment)来为一个语句添加Hints,一个语句块只能有一个注释,而且...
Hints只应用在它们所在sql语句块(statement block,由select、update、delete关键字标识)上,对其它SQL语句或语句的其它部分没有影响。如:对于使用union操作的2个sql语句,如果只在一个sql语句上有Hints,则该Hints不会影响另一个sql语句。 我们可以使用注释(comment)来为一个语句添加Hints,一个语句块只能有一个注释,而且...
Hints只应用在它们所在sql语句块(statement block,由select、update、delete关键字标识)上,对其它SQL语句或语句的其它部分没有影响。如:对于使用union操作的2个sql语句,如果只在一个sql语句上有Hints,则该Hints不会影响另一个sql语句。 我们可以使用注释(comment)来为一个语句添加Hints,一个语句块只能有一个注释,而且...
IGNORE_OPTIM_EMBEDDED_HINTS END_OUTLINE_DATA */ NO_INMEMORY Syntax:NO_INMEMORY ( [ @ queryblock ] tablespec ) Description: The NO_INMEMORY hint disables in-memory queries. SQL?? HelloDBA.com> alter session set "inmemory_query"=enable; HelloDBA.com> exec sql_explain('select /*...
Hints with unknown status MERGE_AJThe MERGE_AJ hint transforms a NOT IN subquery into a merge anti-join to access the specified table. The syntax of the MERGE_AJ hint is MERGE_AJ(table) where table specifies the name or alias of the table to be accessed.(depricated in Oracle 10g) ...
q'[IGNORE_OPTIM_EMBEDDED_HINTS]', q'[OPTIMIZER_FEATURES_ENABLE('11.1.0.7')]', q'[DB_VERSION('11.1.0.7')]', q'[ALL_ROWS]', q'[OUTLINE_LEAF(@"SEL$1")]', q'[INDEX_RS_ASC(@"SEL$1" "TEST"@"SEL$1" ("TEST"."OBJECT_ID"))]', ...
Oracle also gives you a way to influence the decisions of the optimizer with a technique called hints. A hint is nothing more than a comment with a specific format inside a SQL statement. Hints can be categorized as follows: Optimizer SQL hints for changing the query optimizer goal Full tabl...
You can supply additional "hints" to the optimizer as needed. Call the DBMS_APPLICATION_INFO.SET_ACTION procedure before beginning a transaction to register and name a transaction for later use when measuring performance across an application. You should specify what type of activity a transaction ...
drivers. Those operations are not enclosed indoPriviligedblocks. One noteworthy example is that the calling code needs the open socket permission when using the thin driver to open a connection. This is to prevent rogue code from using the drivers for a denial of service attack, among other ...
Use these hints as a reference while you are using the following documentation: Document Categories Window, Oracle Applications System Administrator's Guide. Important: Once you save a Document Category you cannot change it. Application. The application that owns the tables where the voucher number ...