Hello,
I was playing around with the flexible schema option and I faced some client side issues in HANA Studio. Even a simple SELECT takes ages if many columns are included. In my case I generated a table with 8000 columns.
I performed several SELECT's (1 row of data) which required following amount of time to show the results in HANA Studio(not fetched or execution time):
| Amount of column’s | First Execution | Subsequent Execution |
|---|---|---|
| 500 columns | 4 Seconds | 1,5 Seconds |
| 1000 columns | 14 Seconds | 8 Seconds |
| 1500 columns | 30 Seconds | 15 Seconds |
| 2000 columns | 83 Seconds | 30 Seconds |
| 2500 columns | 153 Seconds | 52 Seconds |
If I perform the 2500 select via hdbsql.exe it takes less than a second. It is no problem of the HANA Server, the server proc. Time and the Fetch time are ok. It is also no problem of the RAM/CPU of my client. I guess there is a problem with HANA Studio handling this kind of requests. A colleague of mine can reproduce this behavior.
If I want to see the results I do not get a proper display of the results, after 534 columns the header does not fit together with the data anymore. You can see this on following screenshots.
Everything is fine:
Does not work properly:
HANA Studio has a problem displaying the definition of such tables. Working in the modeler with them is also pretty painful.
Does someone know if it is a known issue or is it caused by the HANA Studio version I use?