Force Oracle Drop Global Temp Table

Question

In our project I create some global temp table that will be like these:

CREATE GLOBAL TEMPORARY TABLE v2dtemp (
  id           NUMBER,
  GOOD_TYPE_GROUP              


        

Answer 1

Another approach worth considering here is to rethink whether you need a temporary table at all.

It is a very common programming practice among those who transition from other RDBMSs to Oracle to overuse them, because they do not understand that you can use such features as Common Table Expressions to implicitly materialise a temporary result set that can be referenced in other parts of the same query, and on other systems it has become natural to write data to a table and then select from it.

The failure is usually compounded by not understanding that PL/SQL-based row by row processing is inferior in almost every respect to SQL-based set processing -- slower, more complex to code, more wordy, and more error prone -- but Oracle presents so many other powerful features for SQL processing that even when it is required it can generally be integrated directly into a SQL SELECT statement anyway.

As a side-note, in 20 years of writing Oracle code for reporting and ETL, I only needed to do use row-by-row processing once, and never needed to use a temporary table.