PGPRO-1026: Store timestamps with timezone, parse timezone from timestamp

from config and command line parameters

src/backup.c

@@ -1546,13 +1546,13 @@ pg_stop_backup(pgBackup *backup)
 		 */
 		sent = pgut_send(conn,
 						   "SELECT *, txid_snapshot_xmax(txid_current_snapshot()),"
-						   " current_timestamp(0)::timestamp"
+						   " current_timestamp(0)::timestamptz"
 						   " FROM pg_stop_backup(false)",
 						   0, NULL, WARNING);
 	else
 		sent = pgut_send(conn,
 						   "SELECT *, txid_snapshot_xmax(txid_current_snapshot()),"
-						   " current_timestamp(0)::timestamp"
+						   " current_timestamp(0)::timestamptz"
 						   " FROM pg_stop_backup()",
 						   0, NULL, WARNING);
 

src/catalog.c

@@ -381,7 +381,7 @@ pgBackupCreateDir(pgBackup *backup)
 void
 pgBackupWriteControl(FILE *out, pgBackup *backup)
 {
-	char		timestamp[20];
+	char		timestamp[100];
 
 	fprintf(out, "#Configuration\n");
 	fprintf(out, "backup-mode = %s\n", pgBackupGetBackupMode(backup));

src/delete.c

@@ -223,7 +223,7 @@ pgBackupDeleteFiles(pgBackup *backup)
 	size_t		i;
 	char	   *backup_id;
 	char		path[MAXPGPATH];
-	char		timestamp[20];
+	char		timestamp[100];
 	parray	   *files;
 
 	/*
@@ -428,4 +428,4 @@ do_delete_instance(void)
 
 	elog(INFO, "Instance '%s' successfully deleted", instance_name);
 	return 0;
-}
+}

src/restore.c

@@ -720,6 +720,7 @@ create_recovery_conf(time_t backup_id,
 		PROGRAM_VERSION);
 	fprintf(fp, "restore_command = 'pg_probackup archive-get -B %s --instance %s --wal-file-path %%p --wal-file-name %%f'\n",
 			backup_path, instance_name);
+	fprintf(fp, "recovery_target_action = 'promote'\n");
 
 	if (target_time)
 		fprintf(fp, "recovery_target_time = '%s'\n", target_time);
@@ -736,7 +737,6 @@ create_recovery_conf(time_t backup_id,
 		 * replayed.
 		 */
 		fprintf(fp, "recovery_target = 'immediate'\n");
-		fprintf(fp, "recovery_target_action = 'promote'\n");
 	}
 
 	if (target_inclusive)

src/show.c

@@ -235,7 +235,7 @@ show_backup_list(FILE *out, parray *backup_list)
 		pgBackup   *backup = parray_get(backup_list, i);
 		TimeLineID	parent_tli;
 		char	   *backup_id;
-		char		timestamp[20] = "----";
+		char		timestamp[100] = "----";
 		char		duration[20] = "----";
 		char		data_bytes_str[10] = "----";
 

src/util.c

@@ -144,9 +144,29 @@ get_data_checksum_version(bool safe)
 void
 time2iso(char *buf, size_t len, time_t time)
 {
-	struct tm *tm = localtime(&time);
+	struct tm  *ptm = gmtime(&time);
+	time_t		gmt = mktime(ptm);
+	time_t		offset;
 
-	strftime(buf, len, "%Y-%m-%d %H:%M:%S", tm);
+	ptm = localtime(&time);
+	offset = time - gmt + (ptm->tm_isdst ? 3600 : 0);
+
+	strftime(buf, len, "%Y-%m-%d %H:%M:%S", ptm);
+
+	if (offset != 0)
+	{
+		buf += strlen(buf);
+		sprintf(buf, "%c%02d",
+				(offset >= 0) ? '+' : '-',
+				abs((int) offset) / SECS_PER_HOUR);
+
+		if (abs((int) offset) % SECS_PER_HOUR != 0)
+		{
+			buf += strlen(buf);
+			sprintf(buf, ":%02d",
+					abs((int) offset % SECS_PER_HOUR) / SECS_PER_MINUTE);
+		}
+	}
 }
 
 /* copied from timestamp.c */

src/utils/logger.h

@@ -2,7 +2,7 @@
  *
  * logger.h: - prototypes of logger functions.
  *
- * Portions Copyright (c) 2017-2017, Postgres Professional
+ * Copyright (c) 2017-2017, Postgres Professional
  *
  *-------------------------------------------------------------------------
  */

src/utils/pgut.c

@@ -28,6 +28,10 @@
 #endif
 #endif
 
+#define MAX_TZDISP_HOUR		15	/* maximum allowed hour part */
+#define SECS_PER_MINUTE		60
+#define MINS_PER_HOUR		60
+
 const char *PROGRAM_NAME = NULL;
 
 const char	   *pgut_dbname = NULL;
@@ -496,19 +500,91 @@ parse_uint64(const char *value, uint64 *result)
  * Convert ISO-8601 format string to time_t value.
  */
 bool
-parse_time(const char *value, time_t *time)
+parse_time(const char *value, time_t *result)
 {
 	size_t		len;
+	int			fields_num,
+				tz = 0,
+				i;
 	char	   *tmp;
-	int			i;
 	struct tm	tm;
 	char		junk[2];
 
 	/* tmp = replace( value, !isalnum, ' ' ) */
 	tmp = pgut_malloc(strlen(value) + + 1);
 	len = 0;
-	for (i = 0; value[i]; i++)
-		tmp[len++] = (IsAlnum(value[i]) ? value[i] : ' ');
+	fields_num = 1;
+
+	while (*value)
+	{
+		if (IsAlnum(*value))
+		{
+			tmp[len++] = *value;
+			value++;
+		}
+		else if (fields_num < 6)
+		{
+			fields_num++;
+			tmp[len++] = ' ';
+			value++;
+		}
+		/* timezone field is 7th */
+		else if ((*value == '-' || *value == '+') && fields_num == 6)
+		{
+			int			hr,
+						min,
+						sec = 0;
+			char	   *cp;
+
+			errno = 0;
+			hr = strtol(value + 1, &cp, 10);
+			if ((value + 1) == cp || errno == ERANGE)
+				return false;
+
+			/* explicit delimiter? */
+			if (*cp == ':')
+			{
+				errno = 0;
+				min = strtol(cp + 1, &cp, 10);
+				if (errno == ERANGE)
+					return false;
+				if (*cp == ':')
+				{
+					errno = 0;
+					sec = strtol(cp + 1, &cp, 10);
+					if (errno == ERANGE)
+						return false;
+				}
+			}
+			/* otherwise, might have run things together... */
+			else if (*cp == '\0' && strlen(value) > 3)
+			{
+				min = hr % 100;
+				hr = hr / 100;
+				/* we could, but don't, support a run-together hhmmss format */
+			}
+			else
+				min = 0;
+
+			/* Range-check the values; see notes in datatype/timestamp.h */
+			if (hr < 0 || hr > MAX_TZDISP_HOUR)
+				return false;
+			if (min < 0 || min >= MINS_PER_HOUR)
+				return false;
+			if (sec < 0 || sec >= SECS_PER_MINUTE)
+				return false;
+
+			tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE + sec;
+			if (*value == '-')
+				tz = -tz;
+
+			fields_num++;
+			value = cp;
+		}
+		/* wrong format */
+		else if (!IsSpace(*value))
+			return false;
+	}
 	tmp[len] = '\0';
 
 	/* parse for "YYYY-MM-DD HH:MI:SS" */
@@ -540,7 +616,25 @@ parse_time(const char *value, time_t *time)
 	/* determine whether Daylight Saving Time is in effect */
 	tm.tm_isdst = -1;
 
-	*time = mktime(&tm);
+	*result = mktime(&tm);
+
+	/* adjust time zone */
+	if (tz != 0)
+	{
+		time_t		ltime = time(NULL);
+		struct tm  *ptm = gmtime(&ltime);
+		time_t		gmt = mktime(ptm);
+		time_t		offset;
+
+		/* UTC time */
+		*result -= tz;
+
+		/* Get local time */
+		ptm = localtime(&ltime);
+		offset = ltime - gmt + (ptm->tm_isdst ? 3600 : 0);
+
+		*result += offset;
+	}
 
 	return true;
 }

src/utils/pgut.h

@@ -195,7 +195,7 @@ extern bool parse_int32(const char *value, int32 *result);
 extern bool parse_uint32(const char *value, uint32 *result);
 extern bool parse_int64(const char *value, int64 *result);
 extern bool parse_uint64(const char *value, uint64 *result);
-extern bool parse_time(const char *value, time_t *time);
+extern bool parse_time(const char *value, time_t *result);
 extern bool parse_int(const char *value, int *result, int flags,
 					  const char **hintmsg);