Granular object type filtering for pg to pg snapshot and streaming#735
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Granular object type filtering for pg to pg snapshot and streaming#735
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kvch
approved these changes
Feb 25, 2026
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Description
Adds granular object type filtering for both schema snapshots and DDL replication in the pg-to-pg pipeline. Users can specify which categories of database objects (tables, sequences, types, indexes, functions, views, etc.) to include or exclude, giving fine-grained control over what gets replicated.
There are 16 supported categories for filtering: tables, sequences, types, indexes, constraints, functions, views, materialized_views, triggers, event_triggers, policies, rules, comments, extensions, collations, text_search
It's worth noting that in some situations inter-dependencies between these object types might block the snapshot for completing or introducing errors. Therefore should be used with care when you know your schema well enough.
Type of Change
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Changes Made
Schema snapshot filtering — Parses pg_dump TOC headers to include/exclude object type sections during snapshot generation. Filters both the main dump and cleanup (DROP) statements. Sequences are also conditionally skipped when excluded.
DDL replication filtering — Evaluates incoming DDL events during WAL processing and skips execution for excluded object types. Handles mixed DDL statements (e.g., CREATE TABLE with a PRIMARY KEY creates both table and index objects) by only skipping when all objects in the event are excluded.
Configuration — Supports both include_object_types (allowlist) and exclude_object_types (denylist) modes, enforcing mutual exclusivity. Available via YAML config and environment variables for both snapshot and DDL replication independently.
Testing
Checklist
Additional Notes