fix tests on windows

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

@@ -347,6 +347,7 @@ now() < sysdate()
 1
 create table t1 (a int) with system versioning;
 insert t1 values (1);
+set @a=sysdate(6);
 select * from t1 for system_time as of now(6);
 a
 select * from t1 for system_time as of sysdate(6);

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

@@ -245,6 +245,10 @@ set timestamp=1000000019;
 select now() < sysdate();
 create table t1 (a int) with system versioning;
 insert t1 values (1);
+
+--source suite/versioning/wait_system_clock.inc
+set @a=sysdate(6);
+
 select * from t1 for system_time as of now(6);
 select * from t1 for system_time as of sysdate(6);
 

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

@@ -146,6 +146,8 @@ explain partitions select * from t1;
 set @str= concat('select row_start from t1 partition (pn) into @ts0');
 prepare stmt from @str; execute stmt; drop prepare stmt;
 
+--source suite/versioning/wait_system_clock.inc
+
 set @now= now(6);
 delete from t1;
 execute select_p0;
@@ -158,6 +160,9 @@ select @ts0 = @ts1;
 
 set @now= now(6);
 insert into t1 values (2);
+
+--source suite/versioning/wait_system_clock.inc
+
 execute select_p0;
 execute select_pn;
 
@@ -166,6 +171,9 @@ prepare stmt from @str; execute stmt; drop prepare stmt;
 
 set @now= now(6);
 update t1 set x = x + 1;
+
+--source suite/versioning/wait_system_clock.inc
+
 execute select_p0;
 execute select_pn;
 

mysql-test/suite/versioning/wait_system_clock.inc

@@ -0,0 +1,10 @@
+#
+# windows has a rather low-resolution system clock
+# wait until the event from the past will actually be in the past
+#
+if (`select @@version_compile_os in ("win32","win64","windows")`)
+{
+  let $_past=`select max(row_start) from t1`;
+  --let $wait_condition=select TIMESTAMP'$_past' < sysdate(6)
+  --source include/wait_condition.inc
+}