contrib/amcheck/verify_nbtree.c

@@ -31,7 +31,6 @@
 #include "access/xact.h"
 #include "catalog/index.h"
 #include "catalog/pg_am.h"
-#include "catalog/pg_opfamily_d.h"
 #include "commands/tablecmds.h"
 #include "lib/bloomfilter.h"
 #include "miscadmin.h"
@@ -334,20 +333,10 @@ bt_index_check_internal(Oid indrelid, bool parentcheck, bool heapallindexed,
 					 errmsg("index \"%s\" metapage has equalimage field set on unsupported nbtree version",
 							RelationGetRelationName(indrel))));
 		if (allequalimage && !_bt_allequalimage(indrel, false))
-		{
-			bool		has_interval_ops = false;
-
-			for (int i = 0; i < IndexRelationGetNumberOfKeyAttributes(indrel); i++)
-				if (indrel->rd_opfamily[i] == INTERVAL_BTREE_FAM_OID)
-					has_interval_ops = true;
 			ereport(ERROR,
 					(errcode(ERRCODE_INDEX_CORRUPTED),
 					 errmsg("index \"%s\" metapage incorrectly indicates that deduplication is safe",
-							RelationGetRelationName(indrel)),
-					 has_interval_ops
-					 ? errhint("This is known of \"interval\" indexes last built on a version predating 2023-11.")
-					 : 0));
-		}
+							RelationGetRelationName(indrel))));
 
 		/* Check index, possibly against table it is an index on */
 		bt_check_every_level(indrel, heaprel, heapkeyspace, parentcheck,

src/backend/utils/adt/datum.c

@@ -43,7 +43,6 @@
 #include "postgres.h"
 
 #include "access/detoast.h"
-#include "catalog/pg_type_d.h"
 #include "fmgr.h"
 #include "utils/builtins.h"
 #include "utils/datum.h"
@@ -334,17 +333,20 @@ datum_image_eq(Datum value1, Datum value2, bool typByVal, int typLen)
  * datum_image_eq() in all cases can use this as their "equalimage" support
  * function.
  *
- * Earlier minor releases erroneously associated this function with
- * interval_ops.  Detect that case to rescind deduplication support, without
- * requiring initdb.
+ * Currently, we unconditionally assume that any B-Tree operator class that
+ * registers btequalimage as its support function 4 must be able to safely use
+ * optimizations like deduplication (i.e. we return true unconditionally).  If
+ * it ever proved necessary to rescind support for an operator class, we could
+ * do that in a targeted fashion by doing something with the opcintype
+ * argument.
  *-------------------------------------------------------------------------
  */
 Datum
 btequalimage(PG_FUNCTION_ARGS)
 {
-	Oid			opcintype = PG_GETARG_OID(0);
+	/* Oid		opcintype = PG_GETARG_OID(0); */
 
-	PG_RETURN_BOOL(opcintype != INTERVALOID);
+	PG_RETURN_BOOL(true);
 }
 
 /*-------------------------------------------------------------------------

src/bin/pgbench/pgbench.c

@@ -6710,22 +6710,15 @@ clear_socket_set(socket_set *sa)
 static void
 add_socket_to_set(socket_set *sa, int fd, int idx)
 {
-	/* See connect_slot() for background on this code. */
-#ifdef WIN32
-	if (sa->fds.fd_count + 1 >= FD_SETSIZE)
-	{
-		pg_log_fatal("too many concurrent database clients for this platform: %d",
-					 sa->fds.fd_count + 1);
-		exit(1);
-	}
-#else
 	if (fd < 0 || fd >= FD_SETSIZE)
 	{
-		pg_log_fatal("socket file descriptor out of range for select(): %d",
-					 fd);
+		/*
+		 * Doing a hard exit here is a bit grotty, but it doesn't seem worth
+		 * complicating the API to make it less grotty.
+		 */
+		pg_log_fatal("too many client connections for select()");
 		exit(1);
 	}
-#endif
 	FD_SET(fd, &sa->fds);
 	if (fd > sa->maxfd)
 		sa->maxfd = fd;

src/bin/scripts/scripts_parallel.c

@@ -223,39 +223,15 @@ ParallelSlotsSetup(const ConnParams *cparams,
 			conn = connectDatabase(cparams, progname, echo, false, true);
 
 			/*
-			 * POSIX defines FD_SETSIZE as the highest file descriptor
-			 * acceptable to FD_SET() and allied macros.  Windows defines it
-			 * as a ceiling on the count of file descriptors in the set, not a
-			 * ceiling on the value of each file descriptor; see
-			 * https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-select
-			 * and
-			 * https://learn.microsoft.com/en-us/windows/win32/api/winsock/ns-winsock-fd_set.
-			 * We can't ignore that, because Windows starts file descriptors
-			 * at a higher value, delays reuse, and skips values.  With less
-			 * than ten concurrent file descriptors, opened and closed
-			 * rapidly, one can reach file descriptor 1024.
-			 *
-			 * Doing a hard exit here is a bit grotty, but it doesn't seem
-			 * worth complicating the API to make it less grotty.
+			 * Fail and exit immediately if trying to use a socket in an
+			 * unsupported range.  POSIX requires open(2) to use the lowest
+			 * unused file descriptor and the hint given relies on that.
 			 */
-#ifdef WIN32
-			if (i >= FD_SETSIZE)
+			if (PQsocket(conn) >= FD_SETSIZE)
 			{
-				pg_log_fatal("too many jobs for this platform: %d", i);
+				pg_log_fatal("too many jobs for this platform -- try %d", i);
 				exit(1);
 			}
-#else
-			{
-				int			fd = PQsocket(conn);
-
-				if (fd >= FD_SETSIZE)
-				{
-					pg_log_fatal("socket file descriptor out of range for select(): %d",
-								 fd);
-					exit(1);
-				}
-			}
-#endif
 
 			init_slot(slots + i, conn);
 		}

src/include/catalog/pg_amproc.dat

@@ -172,6 +172,8 @@
 { amprocfamily => 'btree/interval_ops', amproclefttype => 'interval',
   amprocrighttype => 'interval', amprocnum => '3',
   amproc => 'in_range(interval,interval,interval,bool,bool)' },
+{ amprocfamily => 'btree/interval_ops', amproclefttype => 'interval',
+  amprocrighttype => 'interval', amprocnum => '4', amproc => 'btequalimage' },
 { amprocfamily => 'btree/macaddr_ops', amproclefttype => 'macaddr',
   amprocrighttype => 'macaddr', amprocnum => '1', amproc => 'macaddr_cmp' },
 { amprocfamily => 'btree/macaddr_ops', amproclefttype => 'macaddr',

src/include/catalog/pg_opfamily.dat

@@ -50,7 +50,7 @@
   opfmethod => 'btree', opfname => 'integer_ops' },
 { oid => '1977',
   opfmethod => 'hash', opfname => 'integer_ops' },
-{ oid => '1982', oid_symbol => 'INTERVAL_BTREE_FAM_OID',
+{ oid => '1982',
   opfmethod => 'btree', opfname => 'interval_ops' },
 { oid => '1983',
   opfmethod => 'hash', opfname => 'interval_ops' },

src/test/regress/expected/opr_sanity.out

@@ -2192,7 +2192,6 @@ ORDER BY 1, 2, 3;
                     | array_ops        | array_ops        | anyarray
                     | float_ops        | float4_ops       | real
                     | float_ops        | float8_ops       | double precision
-                    | interval_ops     | interval_ops     | interval
                     | jsonb_ops        | jsonb_ops        | jsonb
                     | numeric_ops      | numeric_ops      | numeric
                     | range_ops        | range_ops        | anyrange
@@ -2200,7 +2199,7 @@ ORDER BY 1, 2, 3;
                     | record_ops       | record_ops       | record
                     | tsquery_ops      | tsquery_ops      | tsquery
                     | tsvector_ops     | tsvector_ops     | tsvector
-(15 rows)
+(14 rows)
 
 -- **************** pg_index ****************
 -- Look for illegal values in pg_index fields.