Use DO blocks instead of functions to allow running on replica

diagnostic.sql

@@ -19,10 +19,11 @@
 -- - continuous aggregates
 --   - continuous aggregate large materialization ranges
 --   - continuous aggregate chunk interval vs bucket width
---
 
-CREATE OR REPLACE FUNCTION pg_temp.check_deprecated_features() RETURNS void LANGUAGE plpgsql AS
-$$
+SET search_path TO pg_catalog, pg_temp;
+
+-- deprecated features
+DO $$
 BEGIN
   -- check for hypertables with hypercore access method
   PERFORM FROM pg_class c join pg_am am ON c.relam=am.oid AND am.amname='hypercore' LIMIT 1;
@@ -36,10 +37,10 @@ BEGIN
     RAISE WARNING 'Found continuous aggregates using deprecated non-finalized form.';
   END IF;
 END
-$$ SET search_path = pg_catalog, pg_temp;
+$$;
 
-CREATE OR REPLACE FUNCTION pg_temp.check_catalog_corruption() RETURNS void LANGUAGE plpgsql AS
-$$
+-- catalog corruption checks
+DO $$
 DECLARE
   v_count int8;
   v_relnames text[];
@@ -72,10 +73,10 @@ BEGIN
     RAISE WARNING 'Found % orphaned chunk relations: %', v_count, v_rels[1:20];
   END IF;
 END
-$$ SET search_path = pg_catalog, pg_temp;
+$$;
 
-CREATE OR REPLACE FUNCTION pg_temp.check_scheduler_present() RETURNS void LANGUAGE plpgsql AS
-$$
+-- scheduler checks
+DO $$
 DECLARE
   v_count int8;
 BEGIN
@@ -92,10 +93,45 @@ BEGIN
     RAISE WARNING 'Multiple TimescaleDB scheduler (%) running in current database', v_count;
   END IF;
 END
-$$ SET search_path = pg_catalog, pg_temp;
+$$;
 
-CREATE OR REPLACE FUNCTION pg_temp.check_cagg_large_materialization_range() RETURNS void LANGUAGE plpgsql AS
-$$
+-- job failure checks
+DO $$
+DECLARE
+  v_failed int;
+  v_total int;
+  v_failed_distinct int;
+  v_job_id int;
+  v_count int;
+  v_job_name text;
+BEGIN
+  -- check for job failures in the last 7 days
+  SELECT
+    count(*) FILTER (WHERE NOT succeeded) AS failed,
+    count(succeeded) AS total,
+    count(DISTINCT job_id) FILTER (WHERE NOT succeeded) failed_distinct
+  INTO v_failed, v_total, v_failed_distinct
+  FROM _timescaledb_internal.bgw_job_stat_history
+  WHERE execution_start > now() - '7 day'::interval;
+  IF v_failed > 0 THEN
+    RAISE WARNING '%/% job executions of % distinct jobs failed in last 7 days', v_failed, v_total, v_failed_distinct;
+    FOR v_job_id, v_count, v_job_name IN
+      SELECT job_id, count(*) AS count, (SELECT application_name FROM _timescaledb_config.bgw_job WHERE id = job_id) AS job_name
+      FROM _timescaledb_internal.bgw_job_stat_history
+      WHERE execution_start > now() - '7 day'::interval AND NOT succeeded
+      GROUP BY job_id
+      ORDER BY count DESC
+      LIMIT 5
+    LOOP
+      RAISE WARNING '  Job % had % failures', v_job_name, v_count;
+    END LOOP;
+  END IF;
+END
+$$;
+
+-- continuous aggregate checks
+-- continuous aggregates with large materialization ranges
+DO $$
 DECLARE
   v_cagg regclass;
   v_range text;
@@ -120,10 +156,10 @@ BEGIN
     RAISE WARNING 'Continuous aggregate % has large materialization range ''%''.', v_cagg, v_range;
   END LOOP;
 END
-$$ SET search_path = pg_catalog, pg_temp;
+$$;
 
-CREATE OR REPLACE FUNCTION pg_temp.check_cagg_chunk_interval() RETURNS void LANGUAGE plpgsql AS
-$$
+-- continuous aggregates with chunk interval smaller than bucket width
+DO $$
 DECLARE
   v_cagg regclass;
   v_cagg_width text;
@@ -149,46 +185,12 @@ BEGIN
     RAISE WARNING 'Continuous aggregate % has chunk width smaller than bucket width % <= %', v_cagg, v_chunk_width, v_cagg_width;
   END LOOP;
 END
-$$ SET search_path = pg_catalog, pg_temp;
-
-CREATE OR REPLACE FUNCTION pg_temp.check_job_failures() RETURNS void LANGUAGE plpgsql AS
-$$
-DECLARE
-  v_failed int;
-  v_total int;
-  v_failed_distinct int;
-  v_job_id int;
-  v_count int;
-  v_job_name text;
-BEGIN
-  -- check for job failures in the last 7 days
-  SELECT
-    count(*) FILTER (WHERE NOT succeeded) AS failed,
-    count(succeeded) AS total,
-    count(DISTINCT job_id) FILTER (WHERE NOT succeeded) failed_distinct
-  INTO v_failed, v_total, v_failed_distinct
-  FROM _timescaledb_internal.bgw_job_stat_history
-  WHERE execution_start > now() - '7 day'::interval;
-  IF v_failed > 0 THEN
-    RAISE WARNING '%/% job executions of % distinct jobs failed in last 7 days', v_failed, v_total, v_failed_distinct;
-    FOR v_job_id, v_count, v_job_name IN
-      SELECT job_id, count(*) AS count, (SELECT application_name FROM _timescaledb_config.bgw_job WHERE id = job_id) AS job_name
-      FROM _timescaledb_internal.bgw_job_stat_history
-      WHERE execution_start > now() - '7 day'::interval AND NOT succeeded
-      GROUP BY job_id
-      ORDER BY count DESC
-      LIMIT 5
-    LOOP
-      RAISE WARNING '  Job % had % failures', v_job_name, v_count;
-    END LOOP;
-  END IF;
-
-END
-$$ SET search_path = pg_catalog, pg_temp;
+$$;
 
 
-CREATE OR REPLACE FUNCTION pg_temp.check_compressed_chunk_batch_sizes() RETURNS void LANGUAGE plpgsql AS
-$$
+-- compression checks
+-- compressed chunk batch sizes
+DO $$
 DECLARE
     v_hypertable_id int;
     v_hypertable regclass;
@@ -243,20 +245,5 @@ BEGIN
         END IF;
     END LOOP;
 END
-$$ SET search_path = pg_catalog, pg_temp;
-
-CREATE OR REPLACE FUNCTION pg_temp.run_checks() RETURNS void LANGUAGE plpgsql AS
-$$
-BEGIN
-  PERFORM pg_temp.check_deprecated_features();
-  PERFORM pg_temp.check_catalog_corruption();
-  PERFORM pg_temp.check_scheduler_present();
-  PERFORM pg_temp.check_job_failures();
-  PERFORM pg_temp.check_compressed_chunk_batch_sizes();
-  PERFORM pg_temp.check_cagg_large_materialization_range();
-  PERFORM pg_temp.check_cagg_chunk_interval();
-END
-$$ SET search_path = pg_catalog, pg_temp;
-
-SELECT pg_temp.run_checks();
+$$;