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create table t (
a int,
b int without system versioning
) with system versioning;
insert into t values(1, 2);
insert into t values(3, 4);
select * from t;
a b
1 2
3 4
select a from t for system_time as of timestamp now(6);
a
1
3
select a, b, b+0 from t for system_time as of timestamp now(6);
a b b+0
1 NULL NULL
3 NULL NULL
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t for system_time as of timestamp now(6);
a b
1 NULL
3 NULL
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select count(*) from t group by b system_time as of timestamp now(6);
count(*)
2
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t for system_time as of timestamp now(6) order by b asc;
a b
1 NULL
3 NULL
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t for system_time as of timestamp now(6) order by b desc;
a b
1 NULL
3 NULL
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t group by a having a=2 system_time as of timestamp now(6);
a b
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t group by b having b=2 system_time as of timestamp now(6);
a b
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
select a from t where b=2 system_time as of timestamp now(6);
a
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select a from t where b=NULL system_time as of timestamp now(6);
a
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select a from t where b is NULL system_time as of timestamp now(6);
a
1
3
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select count(*), b from t group by b having b=NULL system_time as of timestamp now(6);
count(*) b
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
select a, b from t;
a b
1 2
3 4
select count(*) from t for system_time as of timestamp now(6) group by b;
count(*)
2
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t for system_time as of timestamp now(6) group by b having b=2;
a b
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
select a from t for system_time as of timestamp now(6) where b=2;
a
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select a from t for system_time as of timestamp now(6) where b=NULL;
a
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select a from t for system_time as of timestamp now(6) where b is NULL;
a
1
3
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select count(*), b from t for system_time as of timestamp now(6) group by b having b=NULL;
count(*) b
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
create or replace table t (
a int,
b int not null without system versioning
) with system versioning;
insert into t values (1, 2), (3, 4);
select * from t for system_time as of timestamp now(6);
a b
1 NULL
3 NULL
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
select * from t for system_time as of timestamp now(6) where b is NULL;
a b
1 NULL
3 NULL
Warnings:
Warning 4109 Attempt to read unversioned field `b` in historical query
Warning 4109 Attempt to read unversioned field `b` in historical query
drop table t;
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