Revert "pg_stat_statements: Add coverage for entry_dealloc()"

This reverts commit 742f6b3e6d.

The new test failed on big-endian platforms.

Discussion: https://www.postgresql.org/message-id/flat/40d1e4f2-835f-448f-a541-8ff5db75bf3d@eisentraut.org

contrib/pg_stat_statements/Makefile

@@ -19,7 +19,7 @@ LDFLAGS_SL += $(filter -lm, $(LIBS))
 
 REGRESS_OPTS = --temp-config $(top_srcdir)/contrib/pg_stat_statements/pg_stat_statements.conf
 REGRESS = select dml cursors utility level_tracking planning \
-	user_activity wal entry_timestamp max cleanup oldextversions
+	user_activity wal entry_timestamp cleanup oldextversions
 # Disabled because these tests require "shared_preload_libraries=pg_stat_statements",
 # which typical installcheck users do not have (e.g. buildfarm clients).
 NO_INSTALLCHECK = 1

contrib/pg_stat_statements/expected/max.out

@@ -1,82 +0,0 @@
---
--- Test deallocation of entries
---
-SHOW pg_stat_statements.max;
- pg_stat_statements.max 
-------------------------
- 100
-(1 row)
-
-SET pg_stat_statements.track = 'all';
--- Create 101 tables.
-DO $$
-BEGIN
-  FOR i IN 1..101 LOOP
-    EXECUTE format('create table t%s (a int)', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
-SELECT pg_stat_statements_reset() IS NOT NULL AS t;
- t 
----
- t
-(1 row)
-
--- Run 98 queries.
-DO $$
-BEGIN
-  FOR i IN 1..98 LOOP
-    EXECUTE format('select * from t%s', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
--- All 98 queries should be registered.  We just check the first and
--- last to keep the output small.
-SELECT query FROM pg_stat_statements WHERE query LIKE '%t001%' OR query LIKE '%t098%' ORDER BY query;
-       query        
---------------------
- select * from t001
- select * from t098
-(2 rows)
-
--- Query tables 2 through 98 again, so they have a higher calls count.
--- Table 1 still has previous calls count.
-DO $$
-BEGIN
-  FOR i IN 2..98 LOOP
-    EXECUTE format('select * from t%s', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
--- Run 3 more queries.  This will exceed the max and will cause the
--- least used query to be deallocated.  (The queries for
--- pg_stat_statements themselves will also register, so fewer than 3
--- queries will also cause overflow, but let's keep this scenario
--- self-contained.)
-DO $$
-BEGIN
-  FOR i IN 99..101 LOOP
-    EXECUTE format('select * from t%s', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
--- Check that the limit was kept.
-SELECT count(*) <= 100 FROM pg_stat_statements;
- ?column? 
-----------
- t
-(1 row)
-
--- Check that record for t001 has been deallocated.
-SELECT query FROM pg_stat_statements WHERE query LIKE '%t001%' ORDER BY query;
- query 
--------
-(0 rows)
-
--- Check deallocation count.
-SELECT dealloc > 0 AS t FROM pg_stat_statements_info;
- t 
----
- t
-(1 row)
-

contrib/pg_stat_statements/meson.build

@@ -50,7 +50,6 @@ tests += {
       'user_activity',
       'wal',
       'entry_timestamp',
-      'max',
       'cleanup',
       'oldextversions',
     ],

contrib/pg_stat_statements/pg_stat_statements.conf

@@ -1,4 +1,2 @@
 shared_preload_libraries = 'pg_stat_statements'
 max_prepared_transactions = 5
-
-pg_stat_statements.max = 100

contrib/pg_stat_statements/sql/max.sql

@@ -1,61 +0,0 @@
---
--- Test deallocation of entries
---
-
-SHOW pg_stat_statements.max;
-
-SET pg_stat_statements.track = 'all';
-
--- Create 101 tables.
-DO $$
-BEGIN
-  FOR i IN 1..101 LOOP
-    EXECUTE format('create table t%s (a int)', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
-
-SELECT pg_stat_statements_reset() IS NOT NULL AS t;
-
--- Run 98 queries.
-DO $$
-BEGIN
-  FOR i IN 1..98 LOOP
-    EXECUTE format('select * from t%s', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
-
--- All 98 queries should be registered.  We just check the first and
--- last to keep the output small.
-SELECT query FROM pg_stat_statements WHERE query LIKE '%t001%' OR query LIKE '%t098%' ORDER BY query;
-
--- Query tables 2 through 98 again, so they have a higher calls count.
--- Table 1 still has previous calls count.
-DO $$
-BEGIN
-  FOR i IN 2..98 LOOP
-    EXECUTE format('select * from t%s', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
-
--- Run 3 more queries.  This will exceed the max and will cause the
--- least used query to be deallocated.  (The queries for
--- pg_stat_statements themselves will also register, so fewer than 3
--- queries will also cause overflow, but let's keep this scenario
--- self-contained.)
-DO $$
-BEGIN
-  FOR i IN 99..101 LOOP
-    EXECUTE format('select * from t%s', lpad(i::text, 3, '0'));
-  END LOOP;
-END
-$$;
-
--- Check that the limit was kept.
-SELECT count(*) <= 100 FROM pg_stat_statements;
--- Check that record for t001 has been deallocated.
-SELECT query FROM pg_stat_statements WHERE query LIKE '%t001%' ORDER BY query;
--- Check deallocation count.
-SELECT dealloc > 0 AS t FROM pg_stat_statements_info;