Features

Observability

• Prometheus metrics by @steve-chavez in #1526
• More detailed logging by @steve-chavez in #3171, #3046, #3340, #3184
• log-level=debug by @steve-chavez and @laurenceisla in #3435, #3214, #3229

Listener

• Force the Listener to connect to the primary instance when using read replicas by @steve-chavez in #3414, #2781

API

• Preference max-affected to limit affected resources by @taimoorzaeem in #2887

Transactions

• db-hoisted-tx-settings to apply to function settings by @taimoorzaeem in #3242

Admin

• Dump the runtime configuration by @skywriter in #3171
• Dump the runtime schema cache by @taimoorzaeem in #3210

Performance

• Performance improvement on bulk json inserts, around 10% increase on requests per second by removing json_typeof from write queries by @steve-chavez in #2676.

Documentation

• Dark mode toggling (with a button on the bottom right corner) by @laurenceisla in #3289
• Architecture page by @steve-chavez in #3384
• CLI page by @taimoorzaeem in #3248
• Listener page by @laurenceisla and @steve-chavez in #3582

Errors

• Show extra information in the PGRST121 error (could not parse RAISE 'PGRST') by @laurenceisla in #3404
  • Shows the failed MESSAGE or DETAIL in the details field
  • Shows the correct JSON format in the hints field

Fixes

• Dump media handlers and timezones with --dump-schema by @wolfgangwalther in #3237
• Don't hide error on LISTEN channel failure by @steve-chavez in #3323 and #3324
• Incorrect admin server /ready response on slow schema cache loads by @steve-chavez in #3330
• Fix in-database configuration values not loading for pgrst.server_trace_header and pgrst.server_cors_allowed_origins by @laurenceisla in #3345
• Clarify the PGRST121 (could not parse RAISE 'PGRST') error message by @laurenceisla in #3404
• Fix wrong 503 Service Unavailable on pg error 53400 by @taimoorzaeem in #3267
• Fix not adding application_name on all connection strings by @steve-chavez in #2985
• Admin /live and /ready now differentiates a failure as 500 status by @steve-chavez in #3424
  • 503 status is still given when postgREST is in a recovering state
• Media Types are parsed case insensitively by @develop7 in #3478
• Fix listener silently failing on read replica by @steve-chavez in #3533 and #3536
  • If the LISTEN connection fails, it's retried with exponential backoff
• Force listener to connect to read-write instances using target_session_attrs by @steve-chavez in #3414
• Fix incorrect 413 Request Entity Too Large on pg errors 54* by @taimoorzaeem in #3255
• Remove verbosity from error logs starting with "An error occurred..." and replacing it with "Failed to..." by @laurenceisla in #3549

Deprecations

• Support for PostgreSQL versions 9.6, 10 and 11 is deprecated. From this on version onwards, PostgREST will only support non-end-of-life PostgreSQL versions. See https://www.postgresql.org/support/versioning/.
• Prefer: params=single-object is deprecated. Use a function with a single unnamed JSON parameter instead. - @steve-chavez