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https://issues.apache.org/jira/browse/SPARK-36604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17407068#comment-17407068
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Senthil Kumar commented on SPARK-36604:
---------------------------------------
[~yghu] I tested this scenario in Spark2.4, but I don't see this issue is
occurring. Are you seeing this issue only in Spark 3.1.1?
{panel}
_scala> spark.sql("create table c(a timestamp)")_
_res16: org.apache.spark.sql.DataFrame = []_
__
_scala> spark.sql("insert into c select '2021-08-15 15:30:01'")_
_res17: org.apache.spark.sql.DataFrame = []_
__
_scala> spark.sql("analyze table c compute statistics for columns a")_
_res18: org.apache.spark.sql.DataFrame = []_
__
_scala> spark.sql("desc formatted c a").show(true)_
_+--------------+--------------------+_
_| info_name| info_value|_
_+--------------+--------------------+_
_| col_name| a|_
_| data_type| timestamp|_
_| comment| NULL|_
_| min|2021-08-15 15:30:...|_
_| max|2021-08-15 15:30:...|_
_| num_nulls| 0|_
_|distinct_count| 1|_
_| avg_col_len| 8|_
_| max_col_len| 8|_
_| histogram| NULL|_
_+--------------+--------------------+_
{panel}
> timestamp type column analyze result is wrong
> ---------------------------------------------
>
> Key: SPARK-36604
> URL: https://issues.apache.org/jira/browse/SPARK-36604
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.1, 3.1.2
> Environment: Spark 3.1.1
> Reporter: YuanGuanhu
> Priority: Major
>
> when we create table with timestamp column type, the min and max data of the
> analyze result for the timestamp column is wrong
> eg:
> {code}
> > select * from a;
> {code}
> {code}
> 2021-08-15 15:30:01
> Time taken: 2.789 seconds, Fetched 1 row(s)
> spark-sql> desc formatted a a;
> col_name a
> data_type timestamp
> comment NULL
> min 2021-08-15 07:30:01.000000
> max 2021-08-15 07:30:01.000000
> num_nulls 0
> distinct_count 1
> avg_col_len 8
> max_col_len 8
> histogram NULL
> Time taken: 0.278 seconds, Fetched 10 row(s)
> spark-sql> desc a;
> a timestamp NULL
> Time taken: 1.432 seconds, Fetched 1 row(s)
> {code}
>
> reproduce step:
> {code}
> create table a(a timestamp);
> insert into a select '2021-08-15 15:30:01';
> analyze table a compute statistics for columns a;
> desc formatted a a;
> select * from a;
> {code}
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