Chetan Bhat created SPARK-32700:
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Summary: select from table TABLESAMPLE gives wrong resultset.
Key: SPARK-32700
URL: https://issues.apache.org/jira/browse/SPARK-32700
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.0.0
Environment: Spark 3.0.0
Reporter: Chetan Bhat
create table test(id int,name string) stored as parquet;
insert into test values
(5,'Alex'),(8,'Lucy'),(2,'Mary'),(4,'Fred'),(1,'Lisa'),(9,'Eric'),(10,'Adam'),(6,'Mark'),(7,'Lily'),(3,'Evan');
SELECT * FROM test TABLESAMPLE (50 PERCENT); --> output is giving only 3 rows.
spark-sql> SELECT * FROM test TABLESAMPLE (50 PERCENT);
5 Alex
10 Adam
4 Fred
Expected as per the link is 5 rows
-->[https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-sampling.html]
Also the bucket parameter for select from table TABLESAMPLE gives wrong
resultset.
spark-sql> SELECT * FROM test TABLESAMPLE (BUCKET 4 OUT OF 10);
5 Alex
8 Lucy
9 Eric
1 Lisa
3 Evan
Expected is 4 records.
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