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feat(sync-service): remove subquery feature flags - #4741
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…re flags Subqueries in shape WHERE clauses (including incremental move handling for compound AND/OR/NOT expressions) are now permanently enabled. Remove the `allow_subqueries` and `tagged_subqueries` feature flags and the code that only existed to support their disabled paths. - config: empty `@known_feature_flags`; the generic ELECTRIC_FEATURE_FLAGS mechanism is retained for future flags but has none defined - shape: drop `check_feature_flag/2` — subqueries always allowed - consumer/state: drop the `allow_subqueries` disjunct; non-subquery shapes keep fragment streaming (unchanged production behavior) - dependency move policy collapses to always stream: remove `dependency_move_policy` from ShapeInfo/EventHandlerBuilder, the `:invalidate_on_dependency_move` clause in Steady, and the now-unreachable `:unsupported_subquery` handler in Consumer - tests: drop `@tag allow_subqueries: false` and `feature_flags` args; remove obsolete invalidate-policy tests - docs: reframe subqueries as GA (no preview/flag language); trim compose env Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #4741 +/- ##
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- Coverage 60.06% 60.02% -0.05%
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Files 397 397
Lines 43766 43766
Branches 12587 12587
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- Hits 26290 26271 -19
- Misses 17395 17413 +18
- Partials 81 82 +1
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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
robacourt
changed the title
alco
approved these changes
Aug 4, 2026
| @build_env Mix.env() | ||
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| @known_feature_flags ~w[allow_subqueries tagged_subqueries] | ||
| @known_feature_flags ~w[] |
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This probably causes a compilation warning for unused attribute, so it may need to be commented out
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There's no warning because it's still used elsewhere (like line 787). This is to leave the ability for feature flags while not actually having any active feature flags.
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Summary
Subqueries in shape WHERE clauses are now permanently enabled and treated as a generally-available feature. This removes the two gating flags —
allow_subqueriesandtagged_subqueries— so there is no way to turn subqueries off, and cleans up the code that only existed to support their disabled paths.Changes
@known_feature_flagsand simplify thefeature_flagsdefault. The genericELECTRIC_FEATURE_FLAGSmechanism (env var, parsing, plumbing) is intentionally retained for future flags — it just has no flags defined now.allow_subqueriesremoval:shape.ex: dropcheck_feature_flag/2— subqueries are always allowed.consumer/state.ex: drop the"allow_subqueries" in feature_flagsdisjunct. Non-subquery shapes keep fragment streaming, matching current production behavior; only shapes with dependencies / inner subquery shapes use full-txn buffering.tagged_subqueriesremoval — the dependency move policy collapses to always stream:event_handler_builder.ex: removedependency_move_policy/2.subqueries/shape_info.ex: remove thedependency_move_policyfield and type.event_handler/subqueries/steady.ex: remove the:invalidate_on_dependency_moveclause that returned{:error, :unsupported_subquery}.consumer.ex: remove the now-unreachable:unsupported_subqueryerror handler.@tag allow_subqueries: falsetags + the setup conditional, stripfeature_flags: ["allow_subqueries"]args, and delete the two obsolete invalidate-policy tests.shapes.md(section/anchor renamed to#subqueries), collapse theconfig.mdFeature Flags section to a minimalELECTRIC_FEATURE_FLAGSentry, move subqueries out of "Unsupported" in the client skill, and drop theELECTRIC_FEATURE_FLAGSline from the agents-server dev compose.Notes
With the test-env
feature_flagsdefault now empty and theallow_subqueriesdisjunct gone, simple non-subquery shapes exercise fragment streaming by default in tests (matching production) rather than txn-buffering. The full suite passes under that.Test Plan
mix format --check-formattedcleanmix compile --warnings-as-errorsclean (confirms no dead clauses / unused vars)ELECTRIC_FEATURE_FLAGSset (covered byserve_shape_plug_test/subqueries_test)🤖 Generated with Claude Code
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