HOW TO SHRINK A TABLE USING ONLINE REDEFINITION
Last updated on FEBRUARY 15, 2017
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 to 22.214.171.124 [Release 9.0.1 to 11.2]
Information in this document applies to any platform.
This article will demonstrate the use online redefinition (DBMS_REDEFINITION) to shrink the size of a sparsely populated table.
ALTER TABLE ... SHRINK space will lock a table for the duration of operation .. as such ... it may be desirable to resize the table online.
NOTE : To shrink a table in this manner will temporarily need the amount of space required to store the original table ... as well as the shrunk table
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