ZijieSong946 commented on pull request #12054:
URL: https://github.com/apache/beam/pull/12054#issuecomment-650415974
> Thanks for patching the precision fix! The only remaining issue revealed
from internal tests is that during `CAST` operation time microsecond-precision
could be lost. Could you please add the following unit test to the end of the
new test lists? If you have time you can look into it a bit more to see if
there is a quick fix. Otherwise feel free to create a new JIRA to track the
problem and then ignore the test.
>
> ```
> @Test
> public void testCastBetweenTimeAndString() {
> String sql =
> "SELECT CAST(s1 as TIME) as t2, CAST(t1 as STRING) as s2 FROM "
> + "(SELECT '12:34:56.123456' as s1, TIME '12:34:56.123456' as
t1)";
>
> ZetaSQLQueryPlanner zetaSQLQueryPlanner = new
ZetaSQLQueryPlanner(config);
> BeamRelNode beamRelNode = zetaSQLQueryPlanner.convertToBeamRel(sql);
> PCollection<Row> stream = BeamSqlRelUtils.toPCollection(pipeline,
beamRelNode);
>
> PAssert.that(stream)
> .containsInAnyOrder(
> Row.withSchema(
> Schema.builder()
> .addLogicalTypeField("t2", SqlTypes.TIME)
> .addStringField("s2")
> .build())
> .addValues(LocalTime.of(12, 34, 56, 123456000),
"12:34:56.123456")
> .build());
>
pipeline.run().waitUntilFinish(Duration.standardMinutes(PIPELINE_EXECUTION_WAITTIME_MINUTES));
> }
> ```
OK. Sure.
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