Postgres 16 support for PGSM

* PG16 requires changes around one of the hooks, ifdef added
* Meson build file added

Makefile

@@ -21,7 +21,7 @@ REGRESS = basic version guc pgsm_query_id functions counters relations database
 PG_CONFIG ?= pg_config
 
 ifdef USE_PGXS
-MAJORVERSION := $(shell pg_config --version | awk {'print $$2'} | cut -f1 -d".")
+MAJORVERSION := $(shell $(PG_CONFIG) --version | awk {'print $$2'} | cut -f1 -d".")
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)
 else

meson.build

@@ -0,0 +1,54 @@
+# Copyright (c) 2022-2023, PostgreSQL Global Development Group
+
+pg_stat_monitor_sources = files(
+  'pg_stat_monitor.c',
+)
+
+pg_stat_monitor = shared_module('pg_stat_monitor',
+  pg_stat_monitor_sources,
+  kwargs: contrib_mod_args + {
+    'dependencies': contrib_mod_args['dependencies'],
+  },
+)
+contrib_targets += pg_stat_monitor
+
+install_data(
+  'pg_stat_monitor.control',
+  'pg_stat_monitor--2.0.sql',
+  'pg_stat_monitor--1.0--2.0.sql',
+  kwargs: contrib_data_args,
+)
+
+tests += {
+  'name': 'pg_stat_monitor',
+  'sd': meson.current_source_dir(),
+  'bd': meson.current_build_dir(),
+  'regress': {
+    'sql': [
+      'application_name',
+      'application_name_unique',
+      'basic',
+      'cmd_type',
+      'counters',
+      'database',
+      'error_insert',
+      'error',
+      'functions',
+      'guc',
+      'histogram',
+      'pgsqm_query_id',
+      'relations',
+      'rows',
+      'state',
+      'tags',
+      'top_query',
+      'user',
+      'version'
+    ],
+    'regress_args': ['--temp-config', files('pg_stat_monitor.conf')],
+    # Disabled because these tests require
+    # "shared_preload_libraries=pg_stat_monitor", which typical
+    # runningcheck users do not have (e.g. buildfarm clients).
+    'runningcheck': false,
+  },
+}

pg_stat_monitor.c

@@ -164,7 +164,11 @@ DECLARE_HOOK(void pgsm_ExecutorStart, QueryDesc *queryDesc, int eflags);
 DECLARE_HOOK(void pgsm_ExecutorRun, QueryDesc *queryDesc, ScanDirection direction, uint64 count, bool execute_once);
 DECLARE_HOOK(void pgsm_ExecutorFinish, QueryDesc *queryDesc);
 DECLARE_HOOK(void pgsm_ExecutorEnd, QueryDesc *queryDesc);
+#if PG_VERSION_NUM < 160000
 DECLARE_HOOK(bool pgsm_ExecutorCheckPerms, List *rt, bool abort);
+#else
+DECLARE_HOOK(bool pgsm_ExecutorCheckPerms, List *rt, List *rp, bool abort);
+#endif
 
 #if PG_VERSION_NUM >= 140000
 DECLARE_HOOK(PlannedStmt *pgsm_planner_hook, Query *parse, const char *query_string, int cursorOptions, ParamListInfo boundParams);
@@ -783,7 +787,11 @@ pgsm_ExecutorEnd(QueryDesc *queryDesc)
 }
 
 static bool
+#if PG_VERSION_NUM < 160000
 pgsm_ExecutorCheckPerms(List *rt, bool abort)
+#else
+pgsm_ExecutorCheckPerms(List *rt, List *rp, bool abort)
+#endif
 {
 	ListCell   *lr = NULL;
 	int			i = 0;
@@ -827,7 +835,11 @@ pgsm_ExecutorCheckPerms(List *rt, bool abort)
 	num_relations = i;
 
 	if (prev_ExecutorCheckPerms_hook)
+#if PG_VERSION_NUM < 160000
 		return prev_ExecutorCheckPerms_hook(rt, abort);
+#else
+		return prev_ExecutorCheckPerms_hook(rt, rp, abort);
+#endif
 
 	return true;
 }