YufeiLiu created FLINK-16938:
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Summary: SqlTimestamp has lag when convert long to Timestamp
Key: FLINK-16938
URL: https://issues.apache.org/jira/browse/FLINK-16938
Project: Flink
Issue Type: Bug
Components: Table SQL / Planner
Affects Versions: 1.10.0
Reporter: YufeiLiu
When I set rowtime attribute by using expression 'column.rowtime' , and result
type is sql.Timestamp, the result will have lag which is equals with default
timezone offset.
{code:java}
tEnv.fromDataStream(stream, "user_action_time.rowtime, user_name, data");
{code}
I look into the conversion logic, the field was go through 'long ->
SqlTimestamp -> Timestamp' conversion.
{code:java}
long from = System.currentTimeMillis();
long to = SqlTimestamp
.fromEpochMillis(from)
.toTimestamp()
.getTime();
{code}
The result is {{from!=to}}. In {{SqlTimestamp.toTimestamp()}} using
{{Timestamp.valueOf(LocalDateTime dateTime)}} which is contain timezone
infomation, will casue time lag.
>From Timestamp to Timestamp not have this issue, but convert Datastream to
>Table is use StreamRecord.timestamp as rowtime field.
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