Better error message for sf.Frame.from_sql

[chaburkland]

Description

It's not uncommon for queries to successfully finish, but return None. As such, static-frame will raise this error:

TypeError("int() argument must be a string, a bytes-like object or a number, not 'NoneType'")

Example

I think a better error message would be suited here. Something like: RuntimeError("Query finished without returning any results")

Platform

<Series: platform>
<Index>
platform           Linux-5.4.0-165-generic-x86_64-with-glibc2.29
sys.version        3.8.12 (default, Aug 30 2023, 21:17:56) [GCC 9.4.0]
static-frame       1.6.4
numpy              1.24.3
pandas             1.5.3
xlsxwriter         3.1.0
openpyxl           3.0.9
xarray             <ModuleNotFoundError>
tables             3.8.0
pyarrow            0.17.1
msgpack            (1, 0, 0)
msgpack_numpy      None
<<U13>             <object>