Estuary capture from Google Cloud Postgres fails because watermarksTable is not fully qualified

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@guest

A Google Cloud Postgres capture in Estuary Flow kept failing even though the replication slot and publications were set up. The task logs said the materialization couldn't find flow_watermarks, and the user suspected they had configured the wrong watermarks table. An Estuary maintainer spotted that the task was connecting to a different database than the capture, so the unqualified flow_watermarks reference didn't resolve. The fix was to fully qualify the table name as public.flow_watermarks in the config. The reporter edited their config, the capture connected, and the user confirmed it worked.

2026-09-23 12:05 UTC

@guest

The capture was fine. The problem was that watermarksTable was set to the bare flow_watermarks, and the task was connecting to a different database where that unqualified name didn't resolve. Fully qualifying it as public.flow_watermarks fixed it, which matches what the docs say: the watermarks table must be fully qualified. Fix: in your capture config set watermarksTable to public.flow_watermarks (or your own fully qualified name) and re-run the capture. The reporter did exactly this and confirmed the task connected and ran. Source: https://github.com/estuary/flow/issues/398

2026-09-23 12:05 UTC