Remove pg_control's enableIntTimes field.

We don't need it any more.

pg_controldata continues to report that date/time type storage is
"64-bit integers", but that's now a hard-wired behavior not something
it sees in the data.  This avoids breaking pg_upgrade, and perhaps other
utilities that inspect pg_control this way.  Ditto for pg_resetwal.

I chose to remove the "bigint_timestamps" output column of
pg_control_init(), though, as that function hasn't been around long
and probably doesn't have ossified users.

Discussion: https://postgr.es/m/26788.1487455319@sss.pgh.pa.us

doc/src/sgml/func.sgml

@@ -17655,11 +17655,6 @@ SELECT collation for ('foo' COLLATE "de_DE");
        <entry><type>integer</type></entry>
       </row>
 
-      <row>
-       <entry><literal>bigint_timestamps</literal></entry>
-       <entry><type>boolean</type></entry>
-      </row>
-
       <row>
        <entry><literal>float4_pass_by_value</literal></entry>
        <entry><type>boolean</type></entry>

src/backend/access/transam/xlog.c

@@ -4379,11 +4379,6 @@ WriteControlFile(void)
 	ControlFile->toast_max_chunk_size = TOAST_MAX_CHUNK_SIZE;
 	ControlFile->loblksize = LOBLKSIZE;
 
-#ifdef HAVE_INT64_TIMESTAMP
-	ControlFile->enableIntTimes = true;
-#else
-	ControlFile->enableIntTimes = false;
-#endif
 	ControlFile->float4ByVal = FLOAT4PASSBYVAL;
 	ControlFile->float8ByVal = FLOAT8PASSBYVAL;
 
@@ -4579,22 +4574,6 @@ ReadControlFile(void)
 					ControlFile->loblksize, (int) LOBLKSIZE),
 				 errhint("It looks like you need to recompile or initdb.")));
 
-#ifdef HAVE_INT64_TIMESTAMP
-	if (ControlFile->enableIntTimes != true)
-		ereport(FATAL,
-				(errmsg("database files are incompatible with server"),
-				 errdetail("The database cluster was initialized without HAVE_INT64_TIMESTAMP"
-				  " but the server was compiled with HAVE_INT64_TIMESTAMP."),
-				 errhint("It looks like you need to recompile or initdb.")));
-#else
-	if (ControlFile->enableIntTimes != false)
-		ereport(FATAL,
-				(errmsg("database files are incompatible with server"),
-				 errdetail("The database cluster was initialized with HAVE_INT64_TIMESTAMP"
-			   " but the server was compiled without HAVE_INT64_TIMESTAMP."),
-				 errhint("It looks like you need to recompile or initdb.")));
-#endif
-
 #ifdef USE_FLOAT4_BYVAL
 	if (ControlFile->float4ByVal != true)
 		ereport(FATAL,

src/backend/utils/misc/pg_controldata.c

@@ -266,8 +266,8 @@ pg_control_recovery(PG_FUNCTION_ARGS)
 Datum
 pg_control_init(PG_FUNCTION_ARGS)
 {
-	Datum		values[13];
+	Datum		values[12];
-	bool		nulls[13];
+	bool		nulls[12];
 	TupleDesc	tupdesc;
 	HeapTuple	htup;
 	ControlFileData *ControlFile;
@@ -277,7 +277,7 @@ pg_control_init(PG_FUNCTION_ARGS)
 	 * Construct a tuple descriptor for the result row.  This must match this
 	 * function's pg_proc entry!
 	 */
-	tupdesc = CreateTemplateTupleDesc(13, false);
+	tupdesc = CreateTemplateTupleDesc(12, false);
 	TupleDescInitEntry(tupdesc, (AttrNumber) 1, "max_data_alignment",
 					   INT4OID, -1, 0);
 	TupleDescInitEntry(tupdesc, (AttrNumber) 2, "database_block_size",
@@ -296,13 +296,11 @@ pg_control_init(PG_FUNCTION_ARGS)
 					   INT4OID, -1, 0);
 	TupleDescInitEntry(tupdesc, (AttrNumber) 9, "large_object_chunk_size",
 					   INT4OID, -1, 0);
-	TupleDescInitEntry(tupdesc, (AttrNumber) 10, "bigint_timestamps",
+	TupleDescInitEntry(tupdesc, (AttrNumber) 10, "float4_pass_by_value",
 					   BOOLOID, -1, 0);
-	TupleDescInitEntry(tupdesc, (AttrNumber) 11, "float4_pass_by_value",
+	TupleDescInitEntry(tupdesc, (AttrNumber) 11, "float8_pass_by_value",
 					   BOOLOID, -1, 0);
-	TupleDescInitEntry(tupdesc, (AttrNumber) 12, "float8_pass_by_value",
+	TupleDescInitEntry(tupdesc, (AttrNumber) 12, "data_page_checksum_version",
-					   BOOLOID, -1, 0);
-	TupleDescInitEntry(tupdesc, (AttrNumber) 13, "data_page_checksum_version",
 					   INT4OID, -1, 0);
 	tupdesc = BlessTupleDesc(tupdesc);
 
@@ -339,18 +337,15 @@ pg_control_init(PG_FUNCTION_ARGS)
 	values[8] = Int32GetDatum(ControlFile->loblksize);
 	nulls[8] = false;
 
-	values[9] = BoolGetDatum(ControlFile->enableIntTimes);
+	values[9] = BoolGetDatum(ControlFile->float4ByVal);
 	nulls[9] = false;
 
-	values[10] = BoolGetDatum(ControlFile->float4ByVal);
+	values[10] = BoolGetDatum(ControlFile->float8ByVal);
 	nulls[10] = false;
 
-	values[11] = BoolGetDatum(ControlFile->float8ByVal);
+	values[11] = Int32GetDatum(ControlFile->data_checksum_version);
 	nulls[11] = false;
 
-	values[12] = Int32GetDatum(ControlFile->data_checksum_version);
-	nulls[12] = false;
-
 	htup = heap_form_tuple(tupdesc, values, nulls);
 
 	PG_RETURN_DATUM(HeapTupleGetDatum(htup));

src/bin/pg_controldata/pg_controldata.c

@@ -293,8 +293,9 @@ main(int argc, char *argv[])
 		   ControlFile->toast_max_chunk_size);
 	printf(_("Size of a large-object chunk:         %u\n"),
 		   ControlFile->loblksize);
+	/* This is no longer configurable, but users may still expect to see it: */
 	printf(_("Date/time type storage:               %s\n"),
-		   (ControlFile->enableIntTimes ? _("64-bit integers") : _("floating-point numbers")));
+		   _("64-bit integers"));
 	printf(_("Float4 argument passing:              %s\n"),
 		   (ControlFile->float4ByVal ? _("by value") : _("by reference")));
 	printf(_("Float8 argument passing:              %s\n"),

src/bin/pg_resetwal/pg_resetwal.c

@@ -598,11 +598,6 @@ GuessControlValues(void)
 	ControlFile.indexMaxKeys = INDEX_MAX_KEYS;
 	ControlFile.toast_max_chunk_size = TOAST_MAX_CHUNK_SIZE;
 	ControlFile.loblksize = LOBLKSIZE;
-#ifdef HAVE_INT64_TIMESTAMP
-	ControlFile.enableIntTimes = true;
-#else
-	ControlFile.enableIntTimes = false;
-#endif
 	ControlFile.float4ByVal = FLOAT4PASSBYVAL;
 	ControlFile.float8ByVal = FLOAT8PASSBYVAL;
 
@@ -688,8 +683,9 @@ PrintControlValues(bool guessed)
 		   ControlFile.toast_max_chunk_size);
 	printf(_("Size of a large-object chunk:         %u\n"),
 		   ControlFile.loblksize);
+	/* This is no longer configurable, but users may still expect to see it: */
 	printf(_("Date/time type storage:               %s\n"),
-		   (ControlFile.enableIntTimes ? _("64-bit integers") : _("floating-point numbers")));
+		   _("64-bit integers"));
 	printf(_("Float4 argument passing:              %s\n"),
 		   (ControlFile.float4ByVal ? _("by value") : _("by reference")));
 	printf(_("Float8 argument passing:              %s\n"),

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201702101
+#define CATALOG_VERSION_NO	201702231
 
 #endif

src/include/catalog/pg_control.h

@@ -21,7 +21,7 @@
 
 
 /* Version identifier for this pg_control format */
-#define PG_CONTROL_VERSION	960
+#define PG_CONTROL_VERSION	1001
 
 /*
  * Body of CheckPoint XLOG records.  This is declared here because we keep
@@ -215,9 +215,6 @@ typedef struct ControlFileData
 	uint32		toast_max_chunk_size;	/* chunk size in TOAST tables */
 	uint32		loblksize;		/* chunk size in pg_largeobject */
 
-	/* flag indicating internal format of timestamp, interval, time */
-	bool		enableIntTimes; /* int64 storage enabled? */
-
 	/* flags indicating pass-by-value status of various types */
 	bool		float4ByVal;	/* float4 pass-by-value? */
 	bool		float8ByVal;	/* float8, int8, etc pass-by-value? */

src/include/catalog/pg_proc.h

@@ -5355,7 +5355,7 @@ DESCR("pg_controldata checkpoint state information as a function");
 DATA(insert OID = 3443 ( pg_control_recovery PGNSP PGUID 12 1 0 0 0 f f f f t f v s 0 0 2249 "" "{3220,23,3220,3220,16}" "{o,o,o,o,o}" "{min_recovery_end_location,min_recovery_end_timeline,backup_start_location,backup_end_location,end_of_backup_record_required}" _null_ _null_ pg_control_recovery _null_ _null_ _null_ ));
 DESCR("pg_controldata recovery state information as a function");
 
-DATA(insert OID = 3444 ( pg_control_init PGNSP PGUID 12 1 0 0 0 f f f f t f v s 0 0 2249 "" "{23,23,23,23,23,23,23,23,23,16,16,16,23}" "{o,o,o,o,o,o,o,o,o,o,o,o,o}" "{max_data_alignment,database_block_size,blocks_per_segment,wal_block_size,bytes_per_wal_segment,max_identifier_length,max_index_columns,max_toast_chunk_size,large_object_chunk_size,bigint_timestamps,float4_pass_by_value,float8_pass_by_value,data_page_checksum_version}" _null_ _null_ pg_control_init _null_ _null_ _null_ ));
+DATA(insert OID = 3444 ( pg_control_init PGNSP PGUID 12 1 0 0 0 f f f f t f v s 0 0 2249 "" "{23,23,23,23,23,23,23,23,23,16,16,23}" "{o,o,o,o,o,o,o,o,o,o,o,o}" "{max_data_alignment,database_block_size,blocks_per_segment,wal_block_size,bytes_per_wal_segment,max_identifier_length,max_index_columns,max_toast_chunk_size,large_object_chunk_size,float4_pass_by_value,float8_pass_by_value,data_page_checksum_version}" _null_ _null_ pg_control_init _null_ _null_ _null_ ));
 DESCR("pg_controldata init state information as a function");
 
 DATA(insert OID = 3445 ( pg_import_system_collations PGNSP PGUID 12 100 0 0 0 f f f f t f v r 2 0 2278 "16 4089" _null_ _null_ "{if_not_exists,schema}" _null_ _null_ pg_import_system_collations _null_ _null_ _null_ ));