what looks like the directory "line"?

Hello

I'm confused as to what look like entries in a directory of online. Oracle docs say:

"This part of the data block contains information on the real lines in the block (including addresses for each line in the area of data lines)."

The address here means the DBA or the rowid?

In addition, what else this product contains?

Thank you

OracleGuy777 wrote:
Large. To summarize

(1) rowid is really a logical construction is calculated on the fly. It is not stored anywhere (but if we wanted to, we could store as an additional column in the data in the column).

Fix.

AND, it can be stored in different internal locations when it is used to quickly point to a speecific location. For example, it is stored in an index to point to the line for which the index of data exists.

(2) each line in a block of data has an id to identify it, and this id is stored in the header of line (this will be just to say it's the nth line).

Fundamentally correct.

(If line directory is an array of fixed-size buildings, why not just use the "(série de numéro-1) ' * construct_size ' to get there instead of store an ID?. - but why worry?")

(3) the row contains a table mapping offset how bytes, each line is at the beginning of the block.

Once again, basically correct.

If I'm still not OK, I'm going to jump off a bridge! ;)

Don't, don't. Who will ask these difficult questions - which do not need the OS information (but could use Oracle version qualification) - to keep me entertained while I wait for Support of MyOracle response (s)? (And Jonathan of the give a reason to correct me, still :-)))

Tags: Database

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what looks like the directory "line"?

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