UPDATING VIEWS IN ORACLE

Published on : 2017-05-02 00:38:38

That s a much more stable solution going forward updating views in oracle. Doubly so when you re reduced to specifying hints that involve multiple layers of aliases-- it s way too easy for someone touching the view definition to break your query by changing the alias of the table name, for example. buf 1 create table foo 2 as 3 select 1 col1 4 from dual 5* connect by level / Table created. But you need to know the alias of the base table (if any) in the underlying view. «¥ƒá/ÖI֝î-ûi¥U TȬ up vote 12 down vote accepted You can use a hint on a query against a view to force Oracle to use an index on the base table.

2) Verify that the index is not used normally but that Oracle will use it with a hint SQL> set autotrace traceonly; SQL> select * from foo where col1 = 1; 10000 rows selected. 6 %âãÏÓ 4251 0 obj >stream hÞì˜mkÛ0€ÿŠ~A­{єš-¥ŒAiò­äChÍ(lqIRèþýNoiã. The index won t be selective, so Oracle won t want to use it SQL> ed Wrote file afiedt. buf 1 create table foo 2 as 3 select 1 col1 4 from dual 5* connect by level <= 10000 SQL> / Table created. The general syntax would be /*+ index( ) */ An example 1) Create a table with 10,000 identical rows and create an index on the table.

SQL> select col1 2 from vw_foo 3 where col1 = 1; 10000 rows selected updating views in oracle. The general syntax would be /*+ index(<> <> <>) */ An example 1) Create a table with 10,000 identical rows and create an index on the table. SQL> create index idx_foo on foo(col1); Index created.flirt sex sites without a credit card.
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