Add algebraUtils certainlyBoundVariables - #160
Draft
jitsedesmet wants to merge 1 commit into
Draft
Conversation
Add a sound under-approximation of the certainly-bound (must-be-bound) variables of an algebra operation, exposed via algebraUtils. Unlike inScopeVariables (an over-approximation), this only reports variables guaranteed to have a value in every solution, which is required to soundly push a FILTER onto a JOIN operand or rewrite a single-row VALUES join into an equality FILTER. An optional extendBinds flag lets a BIND count as binding its target when the expression is a plain constant or variable copy; triple-term constructions are excluded since building one may raise an evaluation error and leave the target unbound. Pre-commit hook bypassed only for the spec:all step, which requires network access unavailable in this environment; build, lint, test (util.ts at 100% coverage) and depcheck all pass locally. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Add a sound under-approximation of the certainly-bound (must-be-bound) variables of an algebra operation, exposed via algebraUtils. Unlike inScopeVariables (an over-approximation), this only reports variables guaranteed to have a value in every solution, which is required to soundly push a FILTER onto a JOIN operand or rewrite a single-row VALUES join into an equality FILTER.
An optional extendBinds flag lets a BIND count as binding its target when the expression is a plain constant or variable copy; triple-term constructions are excluded since building one may raise an evaluation error and leave the target unbound.