and locate the specific SQL query
which causes the issue. Queries can take excessive time for a very wide
variety of reasons.
On Jul 16, 2010, at 12:56 PM, Adrian Price-Whelan wrote:
Hello --
I'm working with a database populated with data originally from a file
structure
, 2010, at 9:52 AM, Adrian Price-Whelan wrote:
Hi,
I was just wondering at first whether there was a known issue with
ARRAY types, but here is the query:
spectra =
session.query(Spectrum).join(SpectrumHeader).filter(SpectrumHeader.filename
== spPlateFilename).all()
It should return
that the
spectrum_header.filename
has an index, and make sure your foreign key column
spectrum.spectrum_header_pk
is indexed as well.
On 07/19/2010 08:46 AM, Adrian Price-Whelan wrote:
does it take a few seconds to fully fetch all the results and it only gets
1000 rows ? or is that just to get
), session.commit().
I thought that might be another clue, thanks!
On Jul 19, 1:53 pm, Adrian Price-Whelan adrian@gmail.com wrote:
Here is some more detailed information trying the query multiple ways:
Piping the command into psql and writing to a tmp file takes 12 seconds (tmp
file is 241MB
First off, thanks for your quick replies!
I will look into this, but I can tell you that the arrays are strictly numbers
and the array columns are type numeric[]
Thanks again,
Adrian
On Jul 19, 2010, at 3:47 PM, Michael Bayer wrote:
On Jul 19, 2010, at 1:53 PM, Adrian Price-Whelan wrote
Hello --
I'm working with a database populated with data originally from a file
structure of files that are ~150MB each. We are dealing with a lot of data that
is being stored in the database using the 'ARRAY' datatype, specifically
numeric[]. After loading some of the data into the database I
