Query results window limited to 100 rows then 150 then 200

Question

Great product - I love this tool and don't mind helping to find the bugs in the prereleases like this.
When I
SELECT * FROM MY_TABLE
in a sql worksheet, the results window initially only displays the first 100 rows.
I can try to scroll down, but it stops at 100 rows.
If click on Script Output window, the fetch count goes up to 150 and if I click back into
Results window, I can then scroll to row 150. Click back over to Script Output and come back, now I'm up to 200. As long I scroll to the bottom of the Results window and click back and forth, I can increase the size of the results window by 50 rows each time. If I want the result window to show 2000 rows this will get real tedious real quick...
Maybe a bug in dynamically resizing the result set?

Answer 1

Hi gary,
You may have already seen one or more threads like the following on the issue of increased memory overhead for the Excel formats:
Re: Sql Developer 3.1 - Exporting a result set in xls generates and empty file
Basically SQL Developer uses a third-party API to read and write these Excel formats. There are distinct readers and formatters for each of the xls and xlsx forms.
There is a newer version of the API that supports streaming of xlsx Workbooks. Basically it achieves a much lower footprint by keeping in memory only rows that are within a sliding window, while the older, non-streaming version gives access to all rows in the document. The programmer may define the size of this window. I believe the newer API version was either not available or not stable during our 3.1 development cycle. Possibly a future SQL Developer version might use it.
Regards,
Gary
SQL Developer Team