how many rows and how many columns ? the raw one is returning whatever type
the underlying database structure has as it is, the pydal one is building
the whole model (including references)
did you try with cacheable=True in the pydal one ? it won't build
update_records and delete_records, for starters.
On Monday, October 2, 2023 at 8:04:04 PM UTC+2 Jim S wrote:
> The only thing I can see is that the SQL needs to be 'built' by pydal, but
> I find it hard to believe it takes a whole second. Massimo might have to
> add context here.
>
> -Jim
>
> On Monday, October 2, 2023 at 1:00:19 PM UTC-5 urban....@gmail.com wrote:
>
>> Sorry my bad! I mixed up the timings when editing the post.
>>
>> The slower timing is for the dal version.
>> Moreover the dal version is slower even if I remove the .as_list() call.
>> I had originally tried that.
>> When I get the time I'll try "debugging" it by looking at the dal.py
>> source.
>> Asking here if anyone knows an obvious reason for this that I am missing.
>> On Monday, October 2, 2023 at 5:53:47 PM UTC+2 Jim S wrote:
>>
>>> It's possible I'm reading this wrong (it is Monday morning), but .09s
>>> (DAL) is faster than 1.8s (raw SQL).
>>>
>>> Is that a typo? Or, is it my Monday-morning-brain?
>>>
>>> If your raw query is slower, could it be because you're converting to a
>>> dict instead of a list as in your dal query?
>>>
>>> -Jim
>>>
>>> On Monday, October 2, 2023 at 3:07:26 AM UTC-5 urban....@gmail.com
>>> wrote:
>>>
>>>> ids = tuple(m['id'] for m in relevant_models)
>>>> raw_q = db.executesql("""
>>>> SELECT
>>>> *
>>>> FROM "table"
>>>> WHERE ("table".ref_id" IN {});
>>>> """.format(str(ids)), as_dict=True)
>>>> #################### 1.8s
>>>>
>>>> ids = tuple(m['id'] for m in relevant_models)
>>>> dal_q = db(
>>>> db.table.ref_id.belongs(ids)
>>>> ).select(db.table.ALL).as_list()
>>>> ##################### 0.09s
>>>> *Web2Py 2.22.3*
>>>>
>>>> Why would the dal query be so much slower than the raw sql? The
>>>> generated sql (db._lastsql) is the same as the raw.
>>>>
>>>>
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
You received this message because you are subscribed to the Google Groups
"web2py-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to web2py+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/web2py/21b30c28-5378-416f-86de-3e686e8023dbn%40googlegroups.com.
