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[FIX] account_financial_report: Avoid slow vacuum due to ondelete=cascade

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`report_journal_ledger` is auto-vacuumed as any transient model, but has some
ondelete="cascade" constraints that auto-remove subtables when a record is removed,
doing this operation very slow when selecting these sub-records.

Letting default ondelete="set null" would result in same performance bottleneck,
as the select on sub-table is performed the same for setting "null" value on them.

As a solution, and for avoiding a costly index operation, we delete by SQL sub-tables
rows in advance.

A bit of extra logic has been added for avoiding to remove that records if it's not
the turn of vacuum the parent table.
This commit is contained in:
Pedro M. Baeza
2019-08-17 20:25:18 +02:00
committed by chaule97
parent 091a3f31ad
commit 1dbf6b19bd
5 changed files with 27 additions and 1 deletions
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account_financial_report/static/description/index.html
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@@ -465,6 +465,11 @@ If you spotted it first, help us smashing it by providing a detailed and welcome
<li>Alexis de Lattre &lt;<a class="reference external" href="mailto:alexis&#64;via.ecp.fr">alexis&#64;via.ecp.fr</a>&gt;</li>
<li>Mihai Fekete &lt;<a class="reference external" href="mailto:feketemihai&#64;gmail.com">feketemihai&#64;gmail.com</a>&gt;</li>
<li>Miquel Ra??ch &lt;<a class="reference external" href="mailto:miquel.raich&#64;eficent.com">miquel.raich&#64;eficent.com</a>&gt;</li>
<li><a class="reference external" href="https://www.tecnativa.com">Tecnativa</a>:<ul>
<li>Pedro M. Baeza</li>
<li>Sergio Teruel</li>
</ul>
</li>
</ul>
<p>Much of the work in this module was done at a sprint in Sorrento, Italy in
April 2016.</p>