[Patchew-devel] [PATCH v3] add more indices to Message

[Fam Zheng]

On Wed, 10/31 19:32, Paolo Bonzini wrote:
> Add indices to help the series list page.  The project is almost always
> used as a search key, either directly or through a parent project, so
> include both a variant with the project and one without.  The sorting
> keys are left last, while filter keys should come first.

I don't understand when an index without project is helpful, can you elaborate?

> 
> This reduces the SELECT COUNT(*) query in the series list from 180 ms
> to 5 ms on a full dump from a few weeks ago.

Excellent! Thanks!

Fam

> 
> Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
> ---
>  api/migrations/0037_auto_20181031_1439.py | 19 +++++++++++++++++++
>  api/models.py                             |  4 ++++
>  tests/test_import.py                      |  6 ++++--
>  3 files changed, 27 insertions(+), 2 deletions(-)
>  create mode 100644 api/migrations/0037_auto_20181031_1439.py
> 
> diff --git a/api/migrations/0037_auto_20181031_1439.py b/api/migrations/0037_auto_20181031_1439.py
> new file mode 100644
> index 0000000..ca75e37
> --- /dev/null
> +++ b/api/migrations/0037_auto_20181031_1439.py
> @@ -0,0 +1,19 @@
> +# -*- coding: utf-8 -*-
> +# Generated by Django 1.11.15 on 2018-10-31 14:39
> +from __future__ import unicode_literals
> +
> +from django.db import migrations
> +
> +
> +class Migration(migrations.Migration):
> +
> +    dependencies = [
> +        ('api', '0036_populate_message_tags'),
> +    ]
> +
> +    operations = [
> +        migrations.AlterIndexTogether(
> +            name='message',
> +            index_together=set([('is_series_head', 'project', 'date'), ('is_series_head', 'date'), ('is_series_head', 'last_reply_date'), ('is_series_head', 'project', 'last_reply_date')]),
> +        ),
> +    ]
> diff --git a/api/models.py b/api/models.py
> index ab0bd06..09758f6 100644
> --- a/api/models.py
> +++ b/api/models.py
> @@ -714,6 +714,10 @@ class Message(models.Model):
>  
>      class Meta:
>          unique_together = ('project', 'message_id',)
> +        index_together = [('is_series_head', 'project', 'last_reply_date'),
> +                          ('is_series_head', 'project', 'date'),
> +                          ('is_series_head', 'last_reply_date'),
> +                          ('is_series_head', 'date')]
>  
>  class MessageResult(Result):
>      message = models.ForeignKey(Message, related_name='results')
> diff --git a/tests/test_import.py b/tests/test_import.py
> index 5693d7e..64d8c66 100755
> --- a/tests/test_import.py
> +++ b/tests/test_import.py
> @@ -91,8 +91,10 @@ class ImportTest(PatchewTestCase):
>          self.assertTrue(s.project.name, sp.name)
>  
>          self.cli_import("0020-libvirt.mbox.gz")
> -        subj2 = subj + '\n[libvirt]  [PATCH v2] vcpupin: add clear feature'
> -        self.check_cli(["search", "project:Libvirt"], stdout=subj2)
> +        # the order of the search results may change, so we cannot use stdout=...
> +        a, b = self.check_cli(["search", "project:Libvirt"])
> +        self.assertEqual(sorted(a.split('\n')),
> +                         ['[libvirt]  [PATCH v2] vcpupin: add clear feature', subj])
>          self.check_cli(["search", "project:Libvirt-python"], stdout=subj)
>  
>  class UnprivilegedImportTest(ImportTest):
> -- 
> 2.17.1
> 
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