MDEV-29730 mysqldump --dump-history creates broken dump if there are precision-versioned tables

client/mysqldump.c

@@ -3399,7 +3399,7 @@ static uint get_table_structure(const char *table, const char *db, char *table_t
       mysql_free_result(result);
     }
     my_snprintf(query_buff, sizeof(query_buff),
-                "select column_name, extra, generation_expression "
+                "select column_name, extra, generation_expression, data_type "
                 "from information_schema.columns where table_schema=database() "
                 "and table_name=%s", quote_for_equal(table, temp_buff));
     if (mysql_query_with_error_report(mysql, &result, query_buff))
@@ -3413,8 +3413,16 @@ static uint get_table_structure(const char *table, const char *db, char *table_t
     {
       if (strstr(row[1],"INVISIBLE"))
         complete_insert= 1;
-      if (vers_hidden && row[2])
-        vers_hidden= strcmp(row[2], "ROW START");
+      if (vers_hidden && row[2] && strcmp(row[2], "ROW START") == 0)
+      {
+        vers_hidden= 0;
+        if (row[3] && strcmp(row[3], "bigint") == 0)
+        {
+          maybe_die(EX_ILLEGAL_TABLE, "Cannot use --dump-history for table %s with transaction-precise history",
+                    result_table);
+          *versioned= 0;
+        }
+      }
       if (init)
       {
         dynstr_append_checked(&select_field_names, ", ");

mysql-test/suite/versioning/r/data.result

@@ -183,3 +183,26 @@ x	check_row_ts(row_start, row_end)
 2	CURRENT ROW
 drop tables t1, t2;
 drop function check_fields;
+#
+# MDEV-29730 mysqldump --dump-history creates broken dump if there are precision-versioned tables
+#
+create table t1 (x int,
+rs BIGINT unsigned as row start, re BiGiNt unsigned as row end,
+period for system_time (rs,re)) with system versioning engine=innodb;
+insert t1 (x) values (1);
+insert t1 (x) values (2);
+delete from t1 where x=1;
+mysqldump: Cannot use --dump-history for table `t1` with transaction-precise history
+mysqldump: Cannot use --dump-history for table `t1` with transaction-precise history
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL,
+  `rs` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
+  `re` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
+  PERIOD FOR SYSTEM_TIME (`rs`, `re`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci WITH SYSTEM VERSIONING;
+/*!40101 SET character_set_client = @saved_cs_client */;
+INSERT INTO `t1` VALUES
+(2,XXX,18446744073709551615);
+drop table t1;

mysql-test/suite/versioning/t/data.test

@@ -147,4 +147,23 @@ select *, check_row_ts(row_start, row_end) from t2 for system_time all;
 drop tables t1, t2;
 drop function check_fields;
 
+--echo #
+--echo # MDEV-29730 mysqldump --dump-history creates broken dump if there are precision-versioned tables
+--echo #
+create table t1 (x int,
+  rs BIGINT unsigned as row start, re BiGiNt unsigned as row end,
+  period for system_time (rs,re)) with system versioning engine=innodb;
+insert t1 (x) values (1);
+insert t1 (x) values (2);
+delete from t1 where x=1;
+
+--replace_result mysqldump.exe mysqldump
+--error 6
+--exec $MYSQL_DUMP --dump-history test 2>&1 >/dev/null
+--replace_regex /2,\d+,/2,XXX,/ /mysqldump\.exe/mysqldump/
+--error 6
+--exec $MYSQL_DUMP --force --dump-history --compact test 2>&1
+
+drop table t1;
+
 --source suite/versioning/common_finish.inc