4Copyright 2008, Oracle. All rights reserved.Optimizer OperatorsCopyright 2008, Oracle. All rights reserved. 4 - 2ObjectivesAfter completing this lesson, you should e ale to!"#escrie most of the $%& operators"&ist the possile access paths"'(plain ho) *oin operations are performedCopyright 2008, Oracle. All rights reserved. 4 - +Row Source Operations",nary operations- Access .ath"/inary operations- 0oins"1-ary operationsCopyright 2008, Oracle. All rights reserved. 4 - 4Main Structures and Access PathsAccess Paths1. Full Table Scan2. Rowid Scan3. Sample Table Scan4. Index Scan (Unique)5. Index Scan (Range). Index Scan (Full)!. Index Scan (Fa"# Full)$. Index Scan (S%ip)&. Index Scan (Index 'oin)1(. U"ing )i#map Indexe"11. *ombining )i#map Indexe"Structures Tables Indexes Copyright 2008, Oracle. All rights reserved. 4 - 2Full Table Scan".erforms multiloc3 reads4here DB_FILE_MULTIBLOCK_READ_COUNT = 45"6eads all formatted loc3s elo) the high-)ater mar3 "7ay filter ro)s"8aster than inde(range scans for large amount of data "elec# + ,-om emp w.e-e ename/01ing023333333333333333333333333333333333333333333333333333333333333334 Id4 5pe-a#ion 4 6ame 4 Row"4 )7#e" 4 *o"# (8*9U)43333333333333333333333333333333333333333333333333333333333333334 ( 4 S:;:*T ST