Integrate beta version of sbvr-types supporting WebResource#197
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ramirogm wants to merge 7 commits into
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Integrate beta version of sbvr-types supporting WebResource#197ramirogm wants to merge 7 commits into
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After every write, pine has to rerun all rules from the model to ensure
consistency. These rules run over the entire database, sometimes causing
some queries to run for too long against what should be a simple write.
This commit adds a mechanism to help with this issue by narrowing the
set of rows that each rule should touch to those rows that were actually
changed.
Implementing this mechanism safely is doable and not necessarily complex
code-wise, but requires a deep modifications from the current
architecture. This commit adds a restricted form instead where we only
narrow the rows of the root table that were changed. If any other table
was changed then narrowing is a no op.
It can be proved that this is always safe as long as the root table is
selected from only once and the rule is positive ("It is necessary that
each ...").
The implementation here adds a single binding into the rule's SQL query
which can be bound by pine for each rule where an opportunity to use
this optimization arises.
The implementation itself is simple: count how many times the root table
is selected from and if it is selected from exactly one, then add a
narrowing constraint in the form of:
$1 = '{}' OR
<root table>.id = ANY(CAST($1 AS INTEGER[]))
Where $1 will be bound to either '{}', which disables narrowing, or to a
list of IDs that were affected by the write.
This initial implementation can be extended in the future.
Change-type: major
Signed-off-by: Carol Schulze <carol@balena.io>
Add binds for affected IDs in compiled rules
ramirogm
marked this pull request as draft
February 18, 2023 12:09
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@balena-ci re-test |
Change-type: patch Signed-off-by: Ramiro Gonzalez <ramiro.gonzalez@balena.io>
Change-type: patch Signed-off-by: Ramiro Gonzalez <ramiro.gonzalez@balena.io>
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Change-type: patch