Coordinates parallel statement execution
This operation is implemented in the following versions
This example was developed using Oracle 10.2.0.1 on Linux
This example requires the following table definitions
CREATE TABLE t1 ( c1 NUMBER, c2 NUMBER ) PARALLEL 2;
SELECT COUNT(*) FROM t1;
generates the following execution plan
0 SELECT STATEMENT Optimizer=CHOOSE 1 0 SORT (AGGREGATE) 2 1 PX COORDINATOR 3 2 PX SEND (QC (RANDOM)) 4 3 SORT (AGGREGATE) 5 4 PX BLOCK ITERATOR 6 5 TABLE ACCESS (FULL) OF 'T1'