database - How to know how much space on tablespace will the creation of an index take -

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I have to create an index on a specific table space on the oracle database. I would like to know how much space would be in the area of ​​the table, So the pointer will be created, so I can assure that my tables are capable of dealing with this kind of index.

dbms_space is a process in the package that will tell you the number of bytes that That will be allocated to the index segment (which is probably what you think if you are trying to decide that it will fit in your table space) and the number of bytes of that allocation that will actually be used. This process relies on data that is collected in the underlying table, however, if these figures are wrong, then the estimation of the process is also false.


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