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Oracle » PL-SQL » Coding » Performance

Parallel Query Processing


Oracle PL-SQL allows parallel hints to be added at the session and
query level.
Caution should be used when using parallel hints - it can actually
slow down queries in many cases!

-- Session level, enable parallel processing

execute immediate ('alter session enable parallel dml');

-- Query level hint

select account_id /*+ parallel index (t1 idx_invoice_region) */
from invoice_region
where sales_region = 'TGX';

Oracle : Related Topics

Oracle : PL-SQL : Creating a stored procedure
Oracle : PL-SQL : Displaying output
Oracle : PL-SQL : Output variables
Oracle : PL-SQL : Arrays and structures
Oracle : PL-SQL : Conditionals
Oracle : PL-SQL : Looping in PL-SQL
Oracle : PL-SQL : Packages
Oracle : PL-SQL : Exception Handling
Oracle : PL-SQL : Sleep and Wait
Oracle : PL-SQL : Date Manipulation
Oracle : PL-SQL : Exit if error, in a SQL script
Oracle : PL-SQL : Cursors
Oracle : PL-SQL : Complex IF/THEN Processing
Oracle : PL-SQL : Creating triggers
Oracle : PL-SQL : Ranking Data
Oracle : PL-SQL : How to do an outer join in Oracle
Oracle : PL-SQL : Loops in PL-SQL : Hierarchy

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