.Net - Creating an On-Demand recordset rather than pulling everything into memory at once

Question

I don\'t know if this title makes sense, but my situation is as follows:

I\'m writing a .Net program to query an Oracle DB for an enormous amount of history (about 2-yea

Answer 1

The OracleDataReader won't put all records in memory. Look at the Fetchsize property this controls the amount of records actually cached until we need a second roundtrip to the database.

If you want Oracle to return rows faster eg., you can try the

/*+ FIRST_ROWS(n) */

hint in your query vs the

/*+ ALL_ROWS */ 

hint if you can wait for all the data.