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69 lines
1.9 KiB
Text
69 lines
1.9 KiB
Text
create table t(
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a int,
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b int without system versioning
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) with system versioning;
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insert into t values(1, 2);
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insert into t values(3, 4);
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select * from t;
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a b
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1 2
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3 4
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select a from t for system_time as of timestamp now(6);
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a
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1
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3
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select a, b, b+0 from t for system_time as of timestamp now(6);
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a b b+0
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1 NULL NULL
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3 NULL NULL
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select * from t for system_time as of timestamp now(6);
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a b
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1 NULL
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3 NULL
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select count(*) from t group by b for system_time as of timestamp now(6);
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count(*)
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2
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select * from t for system_time as of timestamp now(6) order by b asc;
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a b
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1 NULL
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3 NULL
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select * from t for system_time as of timestamp now(6) order by b desc;
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a b
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1 NULL
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3 NULL
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select * from t group by a having a=2 for system_time as of timestamp now(6);
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a b
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select * from t group by b having b=2 for system_time as of timestamp now(6);
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a b
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select a from t where b=2 for system_time as of timestamp now(6);
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a
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select a from t where b=NULL for system_time as of timestamp now(6);
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a
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select count(*), b from t group by b having b=NULL for system_time as of timestamp now(6);
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count(*) b
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Warnings:
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Warning 4075 Attempt to read unversioned field `b` in historical query
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select a, b from t;
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a b
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1 2
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3 4
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drop table t;
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